Major interaction on record — check this product against your medications before combining. Based on 5 of 8 ingredients. Check your meds →
Dietary supplement

Ultimate Bone Support Ingredients & Drug Interactions

by Woodstock Vitamins

Other (e.g. Tea Bag) Category: Multi-vitamin And Mineral (mvm)
Most serious interaction: Major
The interaction bottom line Most serious interaction: Major

Ultimate Bone Support is a dietary supplement by Woodstock Vitamins with 8 active ingredients. Its ingredients are commonly taken for bone health and osteoporosis, correcting vitamin d deficiency, immune system support.Based on those ingredients, 793 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Vitamin D3, Microcrystalline Hydroxyapatite Concentrate, Choline. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of Ultimate Bone Support by Woodstock Vitamins

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 8 of its 8 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Ultimate Bone Support contains 8 ingredients total. The active ones are Vitamin D3 (for calcium regulation and bone health), Vitamin K2 (for bone mineralization and clotting), Choline (a nutrient involved in bone structure and brain function), Silicon (possibly helpful for bone strength), and two forms of calcium — Microcrystalline Hydroxyapatite Concentrate and Calcium — along with Phosphorus.

These work together as a bone-support formula. The product also contains inactive ingredients like cellulose, magnesium stearate, and medium-chain triglyceride oil to hold everything together.

Does it work?

Strong evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Strong

Clinical evidence supports at least one of this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: Supports healthy bones, cartilage, and ligaments.
  • We looked for evidence on: Corticosteroid-induced osteoporosis, Fall prevention, Fractures, Fetal bone mineralization, Bone density, Joint health — and 1 related terms.
  • The strongest evidence on file: Calcium is rated "Likely Effective" for Corticosteroid-induced osteoporosis (Natural Medicines).
  • Also on file: Calcium is rated "Likely Effective" for Osteoporosis.
  • Also on file: Vitamin D is rated "Likely Effective" for Corticosteroid-induced osteoporosis.

Vitamin D3 is effective for treating rickets, osteomalacia (soft bones from vitamin D deficiency), renal bone disease, and certain calcium disorders. Vitamin K2 is effective for bleeding disorders and vitamin K deficiency, and is possibly effective for osteoporosis.

Calcium is likely effective for osteoporosis and effective for low blood calcium and certain kidney conditions. Silicon is possibly effective for osteoporosis.

The evidence for Choline is insufficient to rate its effect on the conditions this product targets — it hasn't been established whether it works for bone health specifically.

The evidence, ingredient by ingredient Vitamin D Vitamin K Choline Silicon Calcium

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 5 of the 5 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 5 of 5.
  • General safety write-ups exist for 5 of 5.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Vitamin D3 is generally well tolerated at recommended doses, but very high doses over time can cause toxicity with symptoms of high blood calcium (hypercalcemia), anemia, and bone loss. Vitamin K2 is likely safe in pregnancy and lactation.

Choline is likely safe in pregnancy and lactation but can cause fishy body odor, nausea, and diarrhea at very high doses (above 3.5 grams daily). Silicon is likely safe during pregnancy but should be avoided during breastfeeding due to insufficient safety data.

Calcium is likely safe at recommended amounts in pregnancy and lactation, though very high doses have raised theoretical concerns about kidney stones and prostate cancer risk. Orally, calcium commonly causes belching, constipation, diarrhea, or stomach upset.

No pregnancy or lactation data is on file for Phosphorus.

Side effects, ingredient by ingredient Vitamin D Vitamin K Choline Silicon Calcium

Meds to double-check

Major interaction found
Known Interaction Concern · database check
Major identified

At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.

Why this rating?
  • 4 of the 5 matched ingredients can interact with medications — Choline, Calcium, Vitamin D, Vitamin K.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; heart-rhythm medications; lithium.
  • For scale: 794 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you're on warfarin (a blood thinner), do not start this product without checking with your pharmacist — vitamin K2 can reverse its effects and put you at risk for clots. If you take HIV integrase inhibitors like dolutegravir or elvitegravir, calcium can reduce their blood levels significantly.

Separate dosing by several hours if your doctor approves. Heart rhythm medications (verapamil, diltiazem), digoxin, thyroid medication (levothyroxine), sotalol, atorvastatin, HIV medication raltegravir, and the psoriasis treatment calcipotriene also have documented interactions — check your exact medications on this page before starting.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Major medication interactions have been identified, and safety information is well characterized.

This product is designed for bone health and works best for people who need extra calcium, vitamin D, and bone-supporting nutrients. If you take blood thinners (especially warfarin), HIV medications, thyroid medication, heart rhythm drugs, or any bisphosphonate bone medications, you'll need to check with your pharmacist before starting — some of these have Major interactions.

Pregnant or breastfeeding women should talk to their doctor first.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 7 of 8 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated May 23, 2024.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Ultimate Bone Support, straight from the product label.

Brand Woodstock Vitamins
Barcode (UPC) 669439806968
Net contents 60 Packet(s)
Market status On market
Date entered into DSLD May 23, 2024
DSLD ID 310325
Product type Multi-vitamin And Mineral (mvm)
Supplement form Other (e.g. Tea Bag)
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Ultimate Bone Support by Woodstock Vitamins, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Packet(s)
Maximum serving Sizes:
1 Packet(s)
Servings per container
60
UPC/BARCODE
669439806968
IngredientAmount% DV
Vitamin D325 mcg125%
Vitamin K245 mcg38%
Choline60 mg11%
Silicon3 mg--
Microcrystalline Hydroxyapatite Concentrate2.2 Gram(s)--
Calcium550 mg42%
Phosphorus198 mg16%
Microcrystalline Hydroxyapatite1.32 Gram(s)--

Other ingredients: Hydroxypropyl Methylcellulose, Stearic Acid, Magnesium Stearate, Medium Chain Triglyceride Oil, Silica, Microcrystalline Cellulose, Hydroxypropyl Methylcellulose, Water, Purified

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions

Directions: Consume the contents of one packet with a meal, one to two times daily, or as directed by your healthcare practitioner.

Precautions

Consult your healthcare practitioner prior to use.

Individuals taking medication should discuss potential interactions with their healthcare practitioner. Consider total vitamin K intake (food + supplements) if you are taking blood-thinning medication.

Do not use if packet is damaged. The labeling on this product does not comply with California's Proposition 65. Therefore, this product may not be sold in California.

Storage: Keep closed in a cool, dry place out of reach of children.

Formula

Ultimate Bone Support is a comprehensive, convenient, and cost-effective dietary supplement that supports healthy bones, cartilage, and ligaments. Each packet provides the following: two capsules containing a combination of microcrystalline hydroxyapatite concentrate (MCHC) from Calcium Hydroxyapatite Concentrate 275mg, vitamin D3, and vitamin K2 along with one capsule of choline-stabilized orthosilicic acid (ch-OSA).

Ultimate Bone Support contains choline-stabilized orthosilicic acid, a well-absorbed form of silicon that has been clinically tested. Silicon-dependent enzymes link together single chains of amino acids to synthesize collagen fibers. The surfaces of these collagen fibers act as the binding sites for MCHC. The more surface area available to the MCHC to bind to, the more flexible the bone. MCHC, a proprietary, standardized, and safe-source bone extract from New Zealand bovine, contains a crystalline calcium and phosphorus matrix in the ideal physiological ratio of 2:1, plus bioactive growth factors and type I collagen. As a source of calcium, MCHC contributes to the production and maintenance of bone structure, a function supported by vitamins D3 and K2. Amino acids, glycosaminoglycans, and a broad range of essential trace elements are also present. Combine ch-OSA and MCHC with significant levels of vitamins D3 and K2, and the result is a unique package that addresses quantity and quality of bone, and supports overall bone strength and health.

Each packet contains: 2 Calcium Hydroxyapatite Concentrate 275mg with vitamins D3 and K2 capsules and 1 ch-OSA capsule.

Formulation

Bone is composed of a calcium-based mineral complex and an organic material known as collagen. A somewhat flexible and fibrous protein, collagen appears to be a key factor in a bone's ability to withstand sudden impact. The quantity and health of collagen determines the bone's "toughness", while the mineral content determines its strength and stiffness.

Does not contain: Wheat, gluten, yeast, soy protein, dairy products, fish, shellfish, peanuts, tree nuts, egg, ingredients derived from genetically modified organisms (GMOs), artificial colors, artificial sweeteners, or artificial preservatives.

Supports overall bone health and strength

Manufactured in a GMP compliant facility.

Vegetarian Caps

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Storage

Storage: Keep closed in a cool, dry place out of reach of children.

FDA Statement of Identity

Dietary Supplement

Brand IP Statement(s)

Chlorine-stabilized orthosilicic acid (ch-OSA) is a registered trademark of and manufactured by Bio Minerals n.v., Belgium. Produced under US patents 5,922,360; 7,968,528; and 8,771,757.

General Statements

This package is completely recyclable.

See for yourself

Ultimate Bone Support by Woodstock Vitamins label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

What’s inside

The Ingredients in Ultimate Bone Support by Woodstock Vitamins

These are the 8 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Packet(s) Dosage formOther (e.g. Tea Bag) Servings per container60 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Vitamin D3

Interacts with
715 drugs
25 mcg per serving Form: Cholecalciferol

Vitamin D is a fat-soluble vitamin that helps your body absorb calcium and is important for healthy bones, muscles, and immune function. Many people,...

Vitamin D3 monograph & interactions

Vitamin K2

Interacts with
2 drugs
45 mcg per serving Form: Menaquinone-7

Vitamin K is an essential nutrient your body needs for normal blood clotting and to support healthy bones. Most people get enough from food, but suppl...

Vitamin K2 monograph & interactions

Choline

Interacts with
16 drugs
60 mg per serving Form: Choline-stabilized Orthosilicic Acid

Choline is an essential nutrient your body needs for liver function, brain health, and nerve signaling, and many people get enough from foods like egg...

Choline monograph & interactions

Silicon

No known
interactions
3 mg per serving Form: Choline-stabilized Orthosilicic Acid

Silicon is a trace mineral found in the body and in foods like oats, barley, and certain fruits and vegetables, and it is popular in supplements for h...

Silicon monograph & interactions
2.2 Gram(s) per serving

Calcium is an essential mineral your body needs for strong bones, nerve signaling, and muscle function, and supplements can help fill gaps when diet f...

Microcrystalline Hydroxyapatite Concentrate monograph & interactions

Calcium

Interacts with
168 drugs
550 mg per serving Form: Microcrystalline Hydroxyapatite Concentrate

Calcium is an essential mineral your body needs for strong bones, nerve signaling, and muscle function, and supplements can help fill gaps when diet f...

Calcium monograph & interactions

Phosphorus

198 mg per serving Form: Microcrystalline Hydroxyapatite Concentrate

Microcrystalline Hydroxyapatite

Interacts with
168 drugs
1.32 Gram(s) per serving Form: Microcrystalline Hydroxyapatite Concentrate

Calcium is an essential mineral your body needs for strong bones, nerve signaling, and muscle function, and supplements can help fill gaps when diet f...

Microcrystalline Hydroxyapatite monograph & interactions

Other (inactive) ingredients: Hydroxypropyl Methylcellulose, Stearic Acid, Magnesium Stearate, Medium Chain Triglyceride Oil, Silica, Microcrystalline Cellulose, Hydroxypropyl Methylcellulose, Water, Purified. These complete the product’s ingredient list but are not active constituents.

Interaction report

Ultimate Bone Support by Woodstock Vitamins Drug Interactions

Want to check YOUR meds against Ultimate Bone Support?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

Go to the checker
793Drugs
9 Major 146 Moderate 638 Minor

Ingredients driving the most interactions

Choline 16

Each ingredient & the kinds of drugs it affects

For each ingredient in Ultimate Bone Support with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Vitamin D38 drug types · 715 drugs

Aluminum

Vitamin D might increase aluminum absorption and toxicity, but this has only been reported in people with renal failure.
The protein that transports calcium across the intestinal wall can also bind and transport aluminum. This protein is stimulated by vitamin D, which may therefore increase aluminum absorption. This mechanism may contribute to increased aluminum levels and toxicity in people with renal failure, when they take vitamin D and aluminum-containing phosphate binders chronically.

Likelihood Probable Evidence B
Atorvastatin (Lipitor)

Vitamin D might reduce absorption of atorvastatin.
A small, low-quality clinical study shows that taking vitamin D reduces levels of atorvastatin and its active metabolites by up to 55%. However, while atorvastatin levels decreased, total cholesterol, low-density lipoprotein (LDL) cholesterol, and high-density lipoprotein (HDL) cholesterol levels did not substantially change. Atorvastatin is metabolized in the gut by CYP3A4 enzymes, and researchers theorized that vitamin D might induce CYP3A4, causing reduced levels of atorvastatin. However, this proposed mechanism was not specifically studied.

Likelihood Probable Evidence B
Calcipotriene (Dovonex)

Taking calcipotriene with vitamin D increases the risk for hypercalcemia.
Calcipotriene is a vitamin D analog used topically for psoriasis. It can be absorbed in sufficient amounts to cause systemic effects, including hypercalcemia. Theoretically, combining calcipotriene with vitamin D supplements might increase the risk of hypercalcemia.

Likelihood Probable Evidence D
Digoxin (Lanoxin)

Theoretically, hypercalcemia induced by high-dose vitamin D can increase the risk of arrhythmia from digoxin.
High doses of vitamin D can cause hypercalcemia. Hypercalcemia increases the risk of fatal cardiac arrhythmias with digoxin. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and digoxin concurrently.

Likelihood Possible Evidence D
Diltiazem (Cardizem, Others)

Theoretically, hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of diltiazem for arrhythmia.
High doses of vitamin D can cause hypercalcemia. Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically this could also occur with diltiazem. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and diltiazem concurrently.

Likelihood Probable Evidence B
Thiazide Diuretics

Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Thiazide diuretics decrease urinary calcium excretion, which could lead to hypercalcemia if vitamin D supplements are taken concurrently. This has been reported in people being treated with vitamin D for hypoparathyroidism, and also in elderly people with normal parathyroid function who were taking a thiazide, vitamin D, and calcium-containing antacids daily.

Likelihood Probable Evidence D
Verapamil (Calan, Others)

Hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of verapamil for arrhythmia.
Hypercalcemia due to high doses of vitamin D can reduce the effectiveness of verapamil in atrial fibrillation. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and verapamil concurrently.

Likelihood Probable Evidence B
Cytochrome P450 3A4 (Cyp3A4) Substrates

Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
There is some concern that vitamin D might induce CYP3A4. In vitro research suggests that vitamin D induces CYP3A4 transcription. Additionally, observational research has found that increased UV light exposure and serum vitamin D levels are associated with decreased serum levels of CYP3A4 substrates such as tacrolimus and sirolimus, while no association between UV light exposure or vitamin D levels and levels of mycophenolic acid, a non-CYP3A4 substrate, was found. A small, low-quality clinical study shows that taking vitamin D reduces levels of the CYP3A4 substrate atorvastatin and its active metabolites by up to 55%; however, the clinical effects of atorvastatin were not reduced. While researchers theorized that vitamin D might induce CYP3A4, this proposed mechanism was not specifically studied.

Likelihood Possible Evidence D

Microcrystalline Hydroxyapatite Concentrate18 drug types · 168 drugs

Ceftriaxone (Rocephin)

Co-administration of intravenous calcium and ceftriaxone can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys.
Avoid administering intravenous calcium in any form, such as parenteral nutrition or Lactated Ringers, within 48 hours of intravenous ceftriaxone. Case reports in neonates show that administering intravenous ceftriaxone and calcium can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys. In several cases, neonates have died as a result of this interaction. So far there are no reports in adults; however, there is still concern that this interaction might occur in adults.

Likelihood Probable Evidence D
Dolutegravir (Tivicay)

Calcium seems to reduce levels of dolutegravir.
Advise patients to take dolutegravir either 2 hours before or 6 hours after taking calcium supplements. Pharmacokinetic research suggests that taking calcium carbonate 1200 mg concomitantly with dolutegravir 50 mg reduces plasma levels of dolutegravir by almost 40%. Calcium appears to decrease levels of dolutegravir through chelation.

Likelihood Probable Evidence B
Elvitegravir (Vitekta)

Calcium seems to reduce levels of elvitegravir.
Advise patients to take elvitegravir either 2 hours before or 2 hours after taking calcium supplements. Pharmacokinetic research suggests that taking calcium along with elvitegravir can reduce blood levels of elvitegravir through chelation.

Likelihood Probable Evidence B
Aluminum

Calcium citrate might increase aluminum absorption and toxicity. Other types of calcium do not increase aluminum absorption.
Calcium citrate can increase the absorption of aluminum when taken with aluminum hydroxide. The increase in aluminum levels may become toxic, particularly in individuals with kidney disease. However, the effect of calcium citrate on aluminum absorption is due to the citrate anion rather than calcium cation. Calcium acetate does not appear to increase aluminum absorption.

Likelihood Possible Evidence B
Bictegravir/Emtricitabine/Tenofovir Alafenamide (Biktarvy)

Calcium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption when taken in a fasting state.
Advise patients that bictegravir/emtricitabine/tenofovir alafenamide and calcium can be taken together if taken with food. However, if taken on an empty stomach, bictegravir/emtricitabine/tenofovir alafenamide should not be taken with, or 2 hours after, calcium containing products.

Likelihood Probable Evidence D
Bisphosphonates

Calcium reduces the absorption of bisphosphonates.
Advise patients to take bisphosphonates at least 30 minutes before calcium, but preferably at a different time of day. Calcium supplements decrease absorption of bisphosphonates.

Likelihood Probable Evidence C
Calcipotriene (Dovonex)

Taking calcipotriene with calcium might increase the risk for hypercalcemia.
Calcipotriene is a vitamin D analog used topically for psoriasis. It can be absorbed in sufficient amounts to cause systemic effects, including hypercalcemia. Theoretically, combining calcipotriene with calcium supplements might increase the risk of hypercalcemia.

Likelihood Possible Evidence B
Digoxin (Lanoxin)

Using intravenous calcium with digoxin might increase the risk of fatal cardiac arrhythmias.
Hypercalcemia increases the risk of fatal cardiac arrhythmias with digoxin. However, one retrospective analysis of clinical data suggests that intravenous calcium does not increase the risk of dysrhythmias or mortality in patients receiving digoxin.

Likelihood Possible Evidence B
Diltiazem (Cardizem, Others)

Theoretically, calcium may reduce the therapeutic effects of diltiazem.
Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically, calcium might increase this risk of hypercalcemia and reduce the effectiveness of diltiazem.

Likelihood Probable Evidence D
Levothyroxine (Synthroid, Others)

Calcium seems to reduce the absorption and effectiveness of levothyroxine.
Advise patients to take levothyroxine and calcium supplements at least 4 hours apart. Calcium reduces levothyroxine absorption, probably by forming insoluble complexes. Calcium carbonate supplements reduce effectiveness of levothyroxine in patients with hypothyroidism.

Likelihood Probable Evidence B
Lithium

Theoretically, concomitant use of calcium and lithium may increase this risk of hypercalcemia.
Clinical research suggests that long-term use of lithium may cause hypercalcemia in 10% to 60% of patients. Theoretically, concomitant use of lithium and calcium supplements may further increase this risk.

Likelihood Possible Evidence B
Quinolone Antibiotics

Calcium seems to reduce the absorption of quinolone antibiotics.
Advise patients to take oral quinolones at least 2 hours before or 4-6 hours after calcium supplements or calcium-fortified foods. Taking calcium at the same time as oral quinolones can reduce quinolone absorption. Calcium binds to quinolones in the gut.

Likelihood Probable Evidence B
Raltegravir (Isentress)

Calcium may reduce levels of raltegravir.
Pharmacokinetic research shows that taking a single dose of calcium carbonate 3000 mg along with raltegravir 400 mg twice daily modestly decreases the mean area under the curve of raltegravir, but the decrease does not necessitate a dose adjustment of raltegravir. However, a case of elevated HIV-1 RNA levels and documented resistance to raltegravir has been reported for a patient taking calcium carbonate 1 gram three times daily plus vitamin D3 (cholecalciferol) 400 IU three times daily in combination with raltegravir 400 mg twice daily for 11 months. It is thought that calcium reduced raltegravir levels by chelation, leading to treatment failure.

Likelihood Possible Evidence B
Sotalol (Betapace)

Calcium seems to reduce the absorption of sotalol.
Advise patients to separate doses by at least 2 hours before or 4-6 hours after calcium. Calcium appears to reduce the absorption of sotalol, probably by forming insoluble complexes.

Likelihood Possible Evidence B
Tetracycline Antibiotics

Calcium seems to reduce the absorption of tetracycline antibiotics.
Advise patients to take oral tetracyclines at least 2 hours before, or 4-6 hours after calcium supplements. Taking calcium at the same time as oral tetracyclines can reduce tetracycline absorption. Calcium binds to tetracyclines in the gut.

Likelihood Probable Evidence C
Thiazide Diuretics

Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Thiazides reduce calcium excretion by the kidneys. Using thiazides along with moderately large amounts of calcium carbonate increases the risk of milk-alkali syndrome (hypercalcemia, metabolic alkalosis, renal failure). Patients may need to have their serum calcium levels and/or parathyroid function monitored regularly.

Likelihood Probable Evidence C
Verapamil (Calan, Others)

Theoretically, calcium may reduce the therapeutic effects of verapamil.
Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically, use of calcium supplements may increase this risk of hypercalcemia and reduce the effectiveness of verapamil.

Likelihood Probable Evidence D
Calcium Channel Blockers

Intravenous calcium may decrease the effects of calcium channel blockers; oral calcium is unlikely to have this effect.
Intravenous calcium is used to decrease the effects of calcium channel blockers in the management of overdose. Intravenous calcium gluconate has been used before intravenous verapamil (Isoptin) to prevent or reduce the hypotensive effects without affecting the antiarrhythmic effects. But there is no evidence that dietary or supplemental calcium when taken orally interacts with calcium channel blockers.

Likelihood Unlikely Evidence D

Choline1 drug type · 16 drugs

Atropine

Theoretically, choline might decrease the effects of atropine in the brain.
Animal research shows that administering choline one hour before administering atropine can attenuate atropine-induced decreases in brain levels of acetylcholine. Theoretically, concomitant use of choline and atropine may decrease the effects of atropine.

Likelihood Possible Evidence D

Vitamin K21 drug type · 2 drugs

Warfarin (Coumadin)

Vitamin K can antagonize and reverse the therapeutic effects of warfarin.
Vitamin K antagonizes the effects of warfarin. Excessive vitamin K intake, either from supplements or from changes in the diet, can reduce the anticoagulant effect of warfarin.

Likelihood Likely Evidence C
The maker

Brand information

Manufacturer and brand details for Ultimate Bone Support, from the product label.

Woodstock Vitamins

See all Woodstock Vitamins products
Name
Village Vitality LLC
Street Address
79 Tinker Street Fl 2
City
Woodstock
State
NY
ZipCode
12498
Phone Number
(845) 521-7455
Web Address
www.WoodstockVitamins.com
Pharmacist Counseling Corner

Ultimate Bone Support by Woodstock Vitamins: Common Questions

Does Ultimate Bone Support by Woodstock Vitamins interact with any medications?
Yes. Based on its ingredients, Ultimate Bone Support has a known interaction with 793 medications, including 9 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Ultimate Bone Support contains 8 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this if I'm pregnant?
Vitamin K2 and Choline are likely safe during pregnancy. Calcium at recommended amounts is important for bone health in pregnancy. Silicon should be avoided because there isn't enough safety data. Vitamin D is often used during pregnancy but only under your doctor's guidance — do not exceed recommended doses. Talk to your OB or pharmacist before starting any supplement.
Can I take this while breastfeeding?
Vitamin K2 is likely safe. Choline and Calcium are likely safe at recommended amounts — in fact, your body needs adequate calcium while breastfeeding. Silicon should be avoided because safety hasn't been established. No data is available for Phosphorus. Check with your provider before taking supplements.
What are the common side effects?
Calcium commonly causes belching, constipation, diarrhea, flatulence, or stomach upset. Choline can cause nausea, diarrhea, or a fishy body odor at high doses. Vitamin D is well tolerated at normal doses but can cause symptoms of high blood calcium (weakness, nausea, bone pain) if taken in very high amounts over time.
Does this actually help osteoporosis?
Calcium is likely effective for osteoporosis, and Vitamin K2 and Silicon are possibly effective. Vitamin D3 is effective for rickets and bone softening but evidence for osteoporosis specifically isn't in our data. The combination may support bone strength, but talk to your doctor about whether this formula is right for your situation.
Why is there a concern about very high doses?
Vitamin D at very high doses over time can cause toxicity — your body stores excess vitamin D in fat, and too much can raise blood calcium to dangerous levels, which can affect your heart, kidneys, and bones. Calcium in very high amounts (above 2,000 mg daily) has raised theoretical concerns about kidney stones and prostate cancer. Stick to recommended doses.
Can I take this with my thyroid medication?
Calcium in this product can reduce how well your body absorbs levothyroxine (Synthroid). If you take thyroid medication, separate it from this supplement by at least 4 hours — take your thyroid pill first thing in the morning, then this product later. Check with your pharmacist about your exact timing.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Ultimate Bone Support label
Go deeper

The Full Monographs Behind Ultimate Bone Support’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Sources

Sources & How We Checked

Ultimate Bone Support's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 132 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Vitamin D 26 references
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  13. Dietary reference intakes for calcium and vitamin D. Institute of Medicine, November 30, 2010. Available at: http://www.iom.edu/~/media/Files/Report%20Files/2010/Dietary-Reference-Intakes-for-Calcium-and-Vitamin-D/Vitamin%20D%20and%20Calcium%202010%20Repo
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  18. Turner AN, Carr Reese P, Fields KS, Anderson J, Ervin M, Davis JA, Fichorova RN, Roberts MW, Klebanoff MA, Jackson RD. A blinded, randomized controlled trial of high-dose vitamin D supplementation to reduce recurrence of bacterial vaginosis. Am J Obstet G PubMed
  19. Weiner M, Epstein FH. Signs and symptoms of electrolyte disorders. Yale J Biol Med. 1970;43(2):76-109.
  20. Lappe J, Watson P, Travers-Gustafson D, Recker R, Garland C, Gorham E, Baggerly K, McDonnell SL. Effect of Vitamin D and Calcium Supplementation on Cancer Incidence in Older Women: A Randomized Clinical Trial. JAMA. 2017 Mar 28;317(12):1234-1243. PubMed
  21. Roth DE, Leung M, Mesfin E, Qamar H, Watterworth J, Papp E. Vitamin D supplementation during pregnancy: state of the evidence from a systematic review of randomised trials. BMJ. 2017;359:j5237. PubMed
  22. Murai IH, Fernandes AL, Sales LP, et al. Effect of a single high dose of vitamin D3 on hospital length of stay in patients with moderate to severe COVID-19: A randomized clinical trial. JAMA. 2021.
  23. Wang Z, Schuetz EG, Xu Y, Thummel KE. Interplay between vitamin D and the drug metabolizing enzyme CYP3A4. J Steroid Biochem Mol Biol 2013;136:54-8. PubMed
  24. Doyle D, Browne U, Brickley A, Murphy D. Vitamin D-induced hypercalcaemia and acute kidney injury in sarcoidosis. BMJ Case Rep 2023;16(1):e250580. PubMed
  25. Williamson A, Martineau AR, Sheikh A, Jolliffe D, Griffiths CJ. Vitamin D for the management of asthma. Cochrane Database Syst Rev 2023;2(2):CD011511. PubMed
  26. Kinesya E, Santoso D, Gde Arya N, et al. Vitamin D as adjuvant therapy for diabetic foot ulcers: Systematic review and meta-analysis approach. Clin Nutr ESPEN 2023;54:137-143. PubMed

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Vitamin K 11 references
  1. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
  2. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.
  3. Crowther MA, Ageno W, Garcia D, et al. Oral vitamin K versus placebo to correct excessive anticoagulation in patients receiving warfarin: a randomized trial. Ann Intern Med. 2009;150(5):293-300. PubMed
  4. Dietary vitamin K guidance: an effective strategy for stable control of oral anticoagulation? Nutr Rev. 2010;68(3):178-81. PubMed
  5. Kim JS, Nafziger AN, Gaedigk A, et al. Effects of oral vitamin K on S- and R-warfarin pharmacokinetics and pharmacodynamics: enhanced safety of warfarin as a CYP2C9 probe. J Clin Pharmacol. 2001 Jul;41(7):715-22. PubMed
  6. Riegert-Johnson, D. L. and Volcheck, G. W. The incidence of anaphylaxis following intravenous phytonadione (vitamin K1): a 5-year retrospective review. Ann.Allergy Asthma Immunol. 2002;89(4):400-406. PubMed
  7. Dezee, K. J., Shimeall, W. T., Douglas, K. M., Shumway, N. M., and O'malley, P. G. Treatment of excessive anticoagulation with phytonadione (vitamin K): a meta-analysis. Arch.Intern.Med. 2-27-2006;166(4):391-397. DOI
  8. Dentali, F., Ageno, W., and Crowther, M. Treatment of coumarin-associated coagulopathy: a systematic review and proposed treatment algorithms. J.Thromb.Haemost. 2006;4(9):1853-1863. PubMed
  9. Caluwé R, Vandecasteele S, Van Vlem B, Vermeer C, De Vriese AS. Vitamin K2 supplementation in haemodialysis patients: a randomized dose-finding study. Nephrol Dial Transplant. 2014;29(7):1385-90.
  10. Huang ZB, Wan SL, Lu YJ, Ning L, Liu C, Fan SW. Does vitamin K2 play a role in the prevention and treatment of osteoporosis for postmenopausal women: a meta-analysis of randomized controlled trials. Osteoporos Int. 2015;26(3):1175-86. PubMed
  11. Hunnali CR, Devi U, Kitchanan S, Sethuraman G. Three Different Regimens for Vitamin K Birth Prophylaxis in Infants Born Preterm: A Randomized Clinical Trial. J Pediatr 2023;255:98-104. PubMed

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Choline 14 references
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  3. Schmidt, C., Abicht, A., Krampfl, K., Voss, W., Stucka, R., Mildner, G., Petrova, S., Schara, U., Mortier, W., Bufler, J., Huebner, A., and Lochmuller, H. Congenital myasthenic syndrome due to a novel missense mutation in the gene encoding choline acetyl
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  7. Smith, C. M., Swash, M., Exton-Smith, A. N., Phillips, M. J., Overstall, P. W., Piper, M. E., and Bailey, M. R. Choline therapy in Alzheimer's disease. Lancet 8-5-1978;2(8084):318. PubMed
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  9. Christie, J. G. Blackburn 1. M. Glen A. I. M. Zeisel S. Shering A. & Yates C. M. Effects of choline and lecithin on CSF choline levels and on cognitive functioning in patients with presenile dementia of the Alzheimer type. Nutrition and the brain 1979;5
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  12. Wozniak JR, Fuglestad AJ, Eckerle JK, et al. Choline supplementation in children with fetal alcohol disorders: a randomized, double-blind, placebo-controlled trial. Am J Clin Nutr. 2015;102(5): 1113-25.
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  14. Food and Nutrition Board, Institute of Medicine. Choline. Dietary Reference Intakes: Thiamin, Riboflavin, Niacin, Vitamin B-6, Vitamin B-12, Pantothenic Acid, Biotin, and Choline. Washington D.C.: National Academy Press; 1998:390-422.

See these in context on the Choline monograph →

Silicon 19 references
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  2. Jugdaohsingh R, Anderson SH, Tucker KL, et al. Dietary silicon intake and absorption. Am J Clin Nutr 2002;75:887-93. PubMed
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See these in context on the Silicon monograph →

Calcium 62 references
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DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

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