Interactions on record — worth a quick check against your medications. Based on 4 of 6 ingredients. Check your meds →
Dietary supplement

Collagen Flex Toasted Cinnamon Ingredients & Drug Interactions

by DaVinci Laboratories

Collagen Flex Toasted Cinnamon label
See full label image
Liquid Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Collagen Flex Toasted Cinnamon against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Collagen Flex Toasted Cinnamon is a dietary supplement by DaVinci Laboratories with 6 active ingredients. Its ingredients are commonly taken for hair growth and thinning hair, brittle nails, skin health.Based on those ingredients, 412 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Cordyceps Mycelium Extract, Vitamin C. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Collagen Flex Toasted Cinnamon by DaVinci Laboratories

Ask about any prescription or over-the-counter medication and we check it for interactions with Collagen Flex Toasted Cinnamon by DaVinci Laboratories — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Collagen Flex Toasted Cinnamon by DaVinci Laboratories

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

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

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 5 of its 5 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Collagen Flex Toasted Cinnamon has five active ingredients. Biotin is a B vitamin that supports hair, skin, and nail health and is effective for biotin deficiency.

Vitamin C is an antioxidant important for immune function and tissue repair. Cordyceps Mycelium Extract is a medicinal mushroom traditionally used for energy and athletic performance.

Morikol Tripeptide Marine Collagen is a collagen peptide designed to support skin and joint structure. HyaMax is hyaluronic acid, a substance that holds water in skin and tissues.

The product also contains inactive ingredients including glycerin, water, natural flavors, rosmarinic acid, and potassium sorbate.

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: collagen rebuilding and healthy joint function.
  • We looked for evidence on: Aging skin, Brittle nails, Biotin deficiency, Dry eye, Exercise-induced muscle damage, Fractures — and 3 related terms.
  • The strongest evidence on file: Biotin is rated "Likely Effective" for Biotin deficiency (Natural Medicines).
  • Also on file: Hyaluronic Acid is rated "Possibly Effective" for Dry eye.
  • Also on file: Vitamin C is rated "Possibly Ineffective" for Fractures.

The evidence for these ingredients varies. Biotin is effective for biotin deficiency, but shows insufficient evidence for alopecia (hair loss) and appears ineffective for multiple sclerosis and seborrheic dermatitis.

Vitamin C is effective for vitamin C deficiency and possibly effective for anemia of chronic disease, atrial fibrillation, cataracts, and exercise-induced respiratory infections. Cordyceps appears ineffective for athletic performance and has insufficient evidence for sexual dysfunction, arrhythmia, asthma, lung cancer, and COPD.

HyaMax is possibly effective for dry eye and venous leg ulcers but has insufficient evidence for aging skin, hay fever, and sexual dysfunction. We hold no effectiveness data for Morikol Tripeptide Marine Collagen.

The evidence, ingredient by ingredient Biotin Vitamin C Cordyceps Hyaluronic Acid

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 4 of the 4 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 4 of 4.
  • General safety write-ups exist for 4 of 4.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Vitamin C is generally well tolerated at normal doses, but very high doses can cause abdominal cramps, heartburn, diarrhea, nausea, and kidney stones in people prone to them — adverse effects are more likely above 2 grams daily. Biotin is well tolerated even at fairly high doses since excess is removed in the urine; high-dose biotin has rarely caused mild diarrhea.

Cordyceps is generally well tolerated short-term, with occasional abdominal discomfort, constipation, or diarrhea — there is one rare case report of liver inflammation possibly linked to cordyceps, but it's unclear whether cordyceps or a contaminant was responsible. HyaMax (hyaluronic acid) is well tolerated orally and topically, though long-term safety of oral supplements isn't fully studied.

Side effects, ingredient by ingredient Biotin Vitamin C Cordyceps Hyaluronic Acid

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 2 of the 4 matched ingredients can interact with medications — Cordyceps, Vitamin C.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; cancer treatments.
  • For scale: 412 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.

Double-check this product before taking it if you use blood thinners or antiplatelet drugs — vitamin C at high doses and cordyceps both may increase bleeding risk or reduce drug effectiveness. Also verify if you take birth control or hormone replacement therapy (vitamin C can raise estrogen levels), chemotherapy drugs (vitamin C may weaken their effectiveness), thyroid medication like levothyroxine (vitamin C can increase absorption), or immunosuppressants like cyclosporine (cordyceps may interfere).

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. Moderate medication interactions have been identified, and safety information is well characterized.

Collagen Flex works best for people looking to support skin, hair, and nail health with biotin and collagen in a convenient liquid form. If you take blood thinners, birth control, hormone therapy, chemotherapy, thyroid medication, or immunosuppressants, check your exact medications with the search tool before starting — vitamin C and cordyceps have documented interactions that could affect how these drugs work.

Talk to your pharmacist about whether this product fits your current regimen.

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

Assessment coverage: 4 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Aug 22, 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 Collagen Flex Toasted Cinnamon, straight from the product label.

Brand DaVinci Laboratories
Barcode (UPC) 026664018014
Net contents 7.6 Fluid Ounce(s); 225 mL
Market status On market
Date entered into DSLD Aug 22, 2024
DSLD ID 314617
Product type Other Combinations
Supplement form Liquid
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten 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 Collagen Flex Toasted Cinnamon by DaVinci Laboratories, 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:
15 mL
Maximum serving Sizes:
15 mL
Servings per container
15
UPC/BARCODE
026664018014
IngredientAmount% DV
Calories50 Calorie(s)--
Total Carbohydrates9 Gram(s)3%
Biotin2000 mcg6667%
Vitamin C60 mg67%
Protein3 Gram(s)6%
Cordyceps Mycelium Extract700 mg--
Morikol Tripeptide Marine Collagen2000 mg--
HyaMax20 mg--

Other ingredients: Glycerin, Water, Natural Flavors, Rosmarinic Acid, Potassium Sorbate

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.
Formulation

Collagen Flex contains ingredients known to support collagen rebuilding and healthy aging. Working in combination, these ingredients promote healthy joint function. Color, flavor and sweetness of this product may vary due to variations of natural ingredients.

A Liquid Dietary Supplement to support healthy joints

Gluten free / Soy free

Precautions

Warning: If pregnant or nursing, consult your healthcare practitioner before taking this product.

Keep out of reach of children.

To obtain product information or report a serious adverse event, call 1-800-325-1776.

Contains: Fish (tilapia).

Storage

Store in a cool, dry place. Best if used within 60 days of opening.

Brand IP Statement(s)

MoriKol is a registered trademark of Dolcas Biotech, LLC. HyaMax Brand Sodium Hyaluronate is a Trademark of Fenchem Enterprises, LTD.

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.

FDA Statement of Identity

A Liquid Dietary Supplement to support healthy joints

Formula

Made with Morikol Tripeptide Marine Collagen Mint chocolate flavor with other natural flavors

Suggested/Recommended/Usage/Directions

Suggested use: As a dietary supplement, take 15 mL (approximately 1 tablespoon), once daily, or as directed by your healthcare practitioner. Shake well before each use.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Collagen Flex Toasted Cinnamon by DaVinci Laboratories label

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

Collagen Flex Toasted Cinnamon label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Collagen Flex Toasted Cinnamon by DaVinci Laboratories

These are the 6 active ingredients this product is made of. Select any to open its full monograph.

Serving size15 mL Dosage formLiquid Servings per container15 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.

Biotin

No known
interactions
2000 mcg per serving

Biotin (vitamin B7) is a water-soluble vitamin your body needs to turn food into energy and to support healthy hair, skin, and nails. Most people get...

Biotin monograph & interactions

Vitamin C

Interacts with
207 drugs
60 mg per serving Form: Ascorbic Acid

Vitamin C (ascorbic acid) is an essential nutrient your body needs but cannot make, so you must get it from food or supplements. It's important for im...

Vitamin C monograph & interactions

Protein

3 Gram(s) per serving

Cordyceps Mycelium Extract

Interacts with
249 drugs
700 mg per serving Form: Cordyceps sinensis Mycelium Extract

Cordyceps is a fungus used in traditional Chinese medicine for energy, exercise performance, and lung and immune support. Human research is limited an...

Cordyceps Mycelium Extract monograph & interactions

Morikol Tripeptide Marine Collagen

2000 mg per serving Form: Tripeptide Marine Collagen

HyaMax

No known
interactions
20 mg per serving Form: Sodium Hyaluronate

Hyaluronic acid is a natural substance in the body that helps hold water in the skin, joints, and eyes. Oral and topical products are popular for skin...

HyaMax monograph & interactions

Other (inactive) ingredients: Glycerin, Water, Natural Flavors, Rosmarinic Acid, Potassium Sorbate. These complete the product’s ingredient list but are not active constituents.

Interaction report

Collagen Flex Toasted Cinnamon by DaVinci Laboratories Drug Interactions

Want to check YOUR meds against Collagen Flex Toasted Cinnamon?

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
412Drugs
334 Moderate 78 Minor

Ingredients driving the most interactions

Cordyceps Mycelium Extract 249
Vitamin C 207

Individual Drug Interactions

The ingredients in Collagen Flex Toasted Cinnamon interact with 412 drugs. Click any drug to see the details.

2 of the 6 ingredients in Collagen Flex Toasted Cinnamon interact with drugs. Each result below shows which ingredient is responsible. Cordyceps Mycelium Extract Vitamin C

Each ingredient & the kinds of drugs it affects

For each ingredient in Collagen Flex Toasted Cinnamon 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.

Cordyceps Mycelium Extract3 drug types · 249 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, cordyceps may increase the risk of bleeding when used with antiplatelet or anticoagulant drugs.
In vitro and animal research suggests that cordyceps extract inhibits platelet aggregation and function. However, this interaction has not been reported in humans.

Likelihood Possible Evidence D
Immunosuppressants

Theoretically, concurrent use of cordyceps might interfere with immunosuppressive therapy.
Animal and in vitro research suggests that cordyceps stimulates the immune system. However, limited clinical research suggests that taking cordyceps may lower the necessary therapeutic dose of the immunosuppressant cyclosporine, which suggests that cordyceps may have an immunosuppressive effect.

Likelihood Possible Evidence B
Testosterone

Theoretically, concurrent use of cordyceps and testosterone might have additive effects.
Animal research suggests that cordyceps can increase testosterone levels. The clinical significance of this finding is unclear.

Likelihood Possible Evidence D
Cordyceps Mycelium Extract full monograph & interactions

Vitamin C13 drug types · 207 drugs

Alkylating Agents

Theoretically, antioxidant effects of vitamin C might reduce the effectiveness of alkylating agents.
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs that generate free radicals, such as cyclophosphamide, chlorambucil, carmustine, busulfan, and thiotepa. In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as vitamin C have on chemotherapy.

Likelihood Possible Evidence D
Aluminum

Vitamin C can increase the amount of aluminum absorbed from aluminum compounds.
Research in animals and humans shows that vitamin C increases aluminum absorption, theoretically by chelating aluminum and keeping it in solution where it is available for absorption. In people with normal renal function, urinary excretion of aluminum will likely increase, making aluminum retention and toxicity unlikely. Patients with renal failure who take aluminum-containing compounds such as phosphate binders should avoid vitamin C supplements in doses above the recommended dietary allowances.

Likelihood Probable Evidence B
Antitumor Antibiotics

Theoretically, the antioxidant effects of vitamin C might reduce the effectiveness of antitumor antibiotics.
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs which generate free radicals, such as doxorubicin. In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effects, if any, antioxidants such as vitamin C have on chemotherapy.

Likelihood Possible Evidence D
Estrogens

Vitamin C might increase blood levels of estrogens.
Increases in plasma estrogen levels of up to 55% occur under some circumstances when vitamin C is taken concurrently with oral contraceptives or hormone replacement therapy, including topical products. It is suggested that vitamin C prevents oxidation of estrogen in the tissues, regenerates oxidized estrogen, and reduces sulfate conjugation of estrogen in the gut wall. When tissue levels of vitamin C are high, these processes are already maximized and supplemental vitamin C does not have any effect on estrogen levels. Increases in plasma estrogen levels may occur when patients who are deficient in vitamin C take supplements. Monitor these patients for estrogen-related side effects.

Likelihood Probable Evidence B
Fluphenazine (Prolixin)

Theoretically, vitamin C might decrease levels of fluphenazine.
In one patient there was a clinically significant decrease in fluphenazine levels when vitamin C (500 mg twice daily) was started. The mechanism is not known, and there is no further data to confirm this interaction.

Likelihood Possible Evidence D
Indinavir (Crixivan)

Vitamin C can modestly reduce indinavir levels.
One pharmacokinetic study shows that taking vitamin C 1 gram orally once daily along with indinavir 800 mg orally three times daily reduces the area under the concentration-time curve of indinavir by 14%. The mechanism of this interaction is unknown, but it is unlikely to be clinically significant in most patients. The effect of higher doses of vitamin C on indinavir levels is unknown.

Likelihood Probable Evidence B
Levothyroxine (Synthroid, Others)

Vitamin C can increase levothyroxine absorption.
Two clinical studies in adults with poorly controlled hypothyroidism show that swallowing levothyroxine with a glass of water containing vitamin C 500-1000 mg in solution reduces thyroid stimulating hormone (TSH) levels and increases thyroxine (T4) levels when compared with taking levothyroxine alone. This suggests that vitamin C increases the oral absorption of levothyroxine, possibly due to a reduction in pH.

Likelihood Probable Evidence B
Warfarin (Coumadin)

High-dose vitamin C might reduce the levels and effectiveness of warfarin.
Vitamin C in high doses may cause diarrhea and possibly reduce warfarin absorption. There are reports of two people who took up to 16 grams daily of vitamin C and had a reduction in prothrombin time. Lower doses of 5-10 grams daily can also reduce warfarin absorption. In many cases, this does not seem to be clinically significant. However, a case of warfarin resistance has been reported for a patient who took vitamin C 500 mg twice daily. Cessation of vitamin C supplementation resulted in a rapid increase in international normalized ratio (INR). Tell patients taking warfarin to avoid taking vitamin C in excessively high doses (greater than 10 grams daily). Lower doses may be safe, but the anticoagulation activity of warfarin should be monitored. Patients who are stabilized on warfarin while taking vitamin C should avoid adjusting vitamin C dosage to prevent the possibility of warfarin resistance.

Likelihood Possible Evidence D
Acetaminophen (Tylenol, Others)

High-dose vitamin C might slightly prolong the clearance of acetaminophen.
A small pharmacokinetic study in healthy volunteers shows that taking high-dose vitamin C (3 grams) 1.5 hours after taking acetaminophen 1 gram slightly increases the apparent half-life of acetaminophen from around 2.3 hours to 3.1 hours. Ascorbic acid competitively inhibits sulfate conjugation of acetaminophen. However, to compensate, elimination of acetaminophen glucuronide and unconjugated acetaminophen increases. This effect is not likely to be clinically significant.

Likelihood Probable Evidence B
Aspirin

Acidification of the urine by vitamin C might increase aspirin levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction is not clinically significant.

Likelihood Possible Evidence B
Choline Magnesium Trisalicylate (Trilisate)

Acidification of the urine by vitamin C might increase choline magnesium trisalicylate levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction probably is not clinically significant.

Likelihood Possible Evidence B
Niacin

Vitamin C might decrease the beneficial effects of niacin on high-density lipoprotein (HDL) cholesterol levels.
A combination of niacin and simvastatin (Zocor) effectively raises HDL cholesterol levels in patients with coronary disease and low HDL levels. Clinical research shows that taking a combination of antioxidants (vitamin C, vitamin E, beta-carotene, and selenium) along with niacin and simvastatin (Zocor) attenuates this rise in HDL, specifically the HDL-2 and apolipoprotein A1 fractions, by more than 50% in patients with coronary disease. It is not known whether this adverse effect is due to a single antioxidant such as vitamin C, or to the combination. It also is not known whether it will occur in other patient populations.

Likelihood Possible Evidence A
Salsalate (Disalcid)

Acidification of the urine by vitamin C might increase salsalate levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams/day vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction probably is not clinically significant.

Likelihood Possible Evidence B
Vitamin C full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Collagen Flex Toasted Cinnamon, from the product label.

DaVinci Laboratories

See all DaVinci Laboratories products
Name
DaVinci Laboratories a division of FoodScience LLC
Street Address
929 Harvest Lane
City
Williston
State
VT
ZipCode
05495
Phone Number
1-800-325-1776
Web Address
www.davincilabs.com
Pharmacist Counseling Corner

Collagen Flex Toasted Cinnamon by DaVinci Laboratories: Common Questions

Does Collagen Flex Toasted Cinnamon by DaVinci Laboratories interact with any medications?
Yes. Based on its ingredients, Collagen Flex Toasted Cinnamon has a known interaction with 412 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Collagen Flex Toasted Cinnamon contains 6 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 or breastfeeding?
Biotin and vitamin C are likely safe in pregnancy and lactation at normal dietary amounts. Cordyceps, though, doesn't have enough safety data — the facts advise avoiding it during pregnancy and breastfeeding. HyaMax also lacks sufficient safety information for oral supplements in pregnancy and breastfeeding. Talk with your doctor or pharmacist before using this product while pregnant or nursing.
Will this help my hair loss?
Biotin, which is in this product, has insufficient reliable evidence for alopecia (hair loss), so we can't say whether it will help. Biotin is effective for biotin deficiency, but if your hair loss is from something else, biotin may not address it — discuss your specific situation with your doctor.
Does high-dose vitamin C in this product cause kidney stones?
Kidney stones have been reported in people prone to them who take high doses of vitamin C orally, especially above 2 grams daily. Since we don't know the exact vitamin C dose in this liquid formula, if you're at risk for kidney stones or have had them before, check the label and talk to your pharmacist about whether it's right for you.
What are the most common side effects I might notice?
The most common reported side effects from these ingredients are mild: abdominal discomfort, constipation, diarrhea, and nausea — especially from vitamin C or cordyceps at higher doses. These are uncommon with normal use, and some people notice less stomach upset if they take cordyceps with food.
Is the collagen in this product vegan?
The facts don't specify whether Morikol Tripeptide Marine Collagen is vegan — marine collagen is typically derived from fish, but you'd need to check the product label or contact the manufacturer to be sure.
What's HyaMax and why is it in here?
HyaMax is hyaluronic acid, a natural substance that holds water in skin and tissues. It's possibly effective for dry eye and venous leg ulcers. In this collagen product, it's likely there to support skin hydration and moisture retention alongside the other ingredients.

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

Not sure if Collagen Flex Toasted Cinnamon is safe with your meds?

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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.

Collagen Flex Toasted Cinnamon label
Go deeper

The Full Monographs Behind Collagen Flex Toasted Cinnamon’s Ingredients

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

Herb & supplement monograph

Biotin

Biotin (vitamin B7) is a water-soluble vitamin your body needs to turn food into energy and to support healthy hair, skin, and nails. Most people get plenty from a normal diet, and true defi...

Read the full Biotin monograph → Herb & supplement monograph

Vitamin C

Interacts with 207 drugs

Vitamin C (ascorbic acid) is an essential nutrient your body needs but cannot make, so you must get it from food or supplements. It's important for immune function, collagen, and acts as an...

Read the full Vitamin C monograph → Herb & supplement monograph

Cordyceps

Interacts with 249 drugs

Cordyceps is a fungus used in traditional Chinese medicine for energy, exercise performance, and lung and immune support. Human research is limited and mostly low quality, so its benefits ar...

Read the full Cordyceps monograph → Herb & supplement monograph

Hyaluronic Acid

Hyaluronic acid is a natural substance in the body that helps hold water in the skin, joints, and eyes. Oral and topical products are popular for skin moisture and joint comfort, and the evi...

Read the full Hyaluronic Acid monograph →
Sources

Sources & How We Checked

Collagen Flex Toasted Cinnamon'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 73 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.

Biotin 4 references
  1. Debourdeau PM, Djezzar S, Estival JL, et al. Life-threatening eosinophilic pleuropericardial effusion related to vitamins B5 and H. Ann Pharmacother 2001;35:424-6. DOI
  2. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline (2000). Washington, DC: National Academy Press, 2000. Available at: http://b
  3. Mock DM, Quirk JG, Mock NI. Marginal biotin deficiency during normal pregnancy. Am J Clin Nutr 2002;75:295-9. PubMed
  4. Sedel F, Papeix C, Bellanger A, Touitou V, Lebrun-Frenay C, Galanaud D, et al. High doses of biotin in chronic progressive multiple sclerosis: a pilot study.Mult Scler Relat Disord. 2015;4(2):159-69. doi: 10.1016/j.msard.2015.01.005. PubMed

See these in context on the Biotin monograph →

Vitamin C 51 references
  1. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
  2. Back DJ, Breckenridge AM, MacIver M, et al. Interaction of ethinyloestradiol with ascorbic acid in man. Br Med J (Clin Res Ed) 1981;282:1516.
  3. Morris JC, Beeley L, Ballantine N. Interaction of ethinyloestradiol with ascorbic acid in man [letter]. Br Med J (Clin Res Ed) 1981;283:503.
  4. Labriola D, Livingston R. Possible interactions between dietary antioxidants and chemotherapy. Oncology 1999;13:1003-8.
  5. Dwyer JH, Merz NB, Shirocre AM, et al. Progression of early atherosclerosis and intake of vitamin C and vitamin E from supplements and food. The Los Angeles Atherosclerosis Study. 41st Annual Conference on Cardiovascular Disease Epidemiology and Prevent
  6. Levine M, Rumsey SC, Daruwala R, et al. Criteria and recommendations for vitamin C intake. JAMA 1999;281:1415-23. PubMed
  7. Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
  8. Segal S, Kaminski S. Drug-nutrient interactions. American Druggist 1996 Jul;42-8.
  9. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington, DC: National Academy Press, 2000. Available at: http://www.nap.edu/books/0309069351/html/.
  10. Houston JB, Levy G. Drug biotransformation interactions in man VI: Acetaminophen and ascorbic acid. J Pharm Sci 1976;65:1218-21. PubMed
  11. Brown BG, Zhao XQ, Chait A, et al. Simvastatin and niacin, antioxidant vitamins, or the combination for the prevention of coronary disease. N Engl J Med 2001;345:1583-93. DOI
  12. Rosenthal G. Interaction of ascorbic acid and warfarin. JAMA 1971;215:1671. DOI
  13. Hume R, Johnstone JM, Weyers E. Interaction of ascorbic acid and warfarin. JAMA 1972;219:1479. DOI
  14. Smith EC, Skalski RJ, Johnson GC, Rossi GV. Interaction of ascorbic acid and warfarin. JAMA 1972;221:1166. DOI
  15. Traxer O, Huet B, Poindexter J, et al. Effect of ascorbic acid consumption on urinary stone risk factors. J Urol 2003;170:397-401.. PubMed
  16. Domingo JL, Gomez M, Llobet JM, Richart C. Effect of ascorbic acid on gastrointestinal aluminum absorption (letter). Lancet 1991;338:1467.
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Parts of this content are provided by the Therapeutic Research Center, LLC.

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.

© 2021 Therapeutic Research Center, LLC

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