Interactions on record — worth a quick check against your medications. Based on 3 of 5 ingredients. Check your meds →
Dietary supplement

ThyroSupport Ingredients & Drug Interactions

by Dr. Garber's

ThyroSupport label
See full label image
Liquid Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking ThyroSupport 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

ThyroSupport is a dietary supplement by Dr. Garber's with 5 active ingredients. Its ingredients are commonly taken for dry eyes and eye strain, joint pain and inflammation, immune and general wellness support.Based on those ingredients, 2,041 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Thyroid extract, Black Currant. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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HelloPharmacist Scorecard of ThyroSupport by Dr. Garber's

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 Sep 17, 2026

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 5 active ingredients.
  • “Proprietary Blend” is a proprietary blend — the label gives one combined amount (83 mg) without saying how much of each component you get.

ThyroSupport contains five ingredients: a proprietary blend, black currant, bloodwig dogberry, sweet almond, and thyroid extract. The product is a liquid, so it also contains glycerin, purified water, and alcohol as inactive ingredients.

The active components work together to support thyroid function — black currant and sweet almond are traditionally used botanicals, while thyroid extract itself provides thyroid hormone precursors (T3 and T4). Bloodwig dogberry and native gold are parts of the proprietary blend.

Does it work?

Not established
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
Not established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use.

Why this rating?
  • The label markets this product for: optimal thyroid health.
  • We looked for evidence on: Hypothyroidism, thyroid function, metabolic support, thyroid balance.
  • The closest evidence on file: Thyroid Extract is rated "Insufficient Reliable Evidence To Rate" for Hypothyroidism (Natural Medicines).

The evidence for most of these ingredients hasn't been firmly established. Black currant shows insufficient reliable evidence for Alzheimer disease, liver disease, upper respiratory infection, cough, and eczema.

Sweet almond similarly lacks established evidence for aging skin, ADHD, cancer, heart disease, and constipation. Thyroid extract hasn't been reliably studied for thyroid cancer, hypothyroidism, or infertility in the data we hold.

In short, the effectiveness of this product for its intended use isn't confirmed by the evidence available to us.

The evidence, ingredient by ingredient Black Currant Sweet Almond Thyroid Extract

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 3 of the 3 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 3 of 3.
  • General safety write-ups exist for 3 of 3.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Thyroid extract is the biggest safety concern here. OTC thyroid extracts may contain active hormones in unpredictable amounts and shouldn't be used without medical supervision.

The facts advise against it in pregnancy because thyroid hormone levels must be carefully controlled, and it should be avoided while breastfeeding unless a doctor directs you to use it — unregulated hormone exposure could affect the nursing infant. Black currant, while safe as a food, is less studied in concentrated supplement form, so caution is advised.

Sweet almond is generally well tolerated as a food but carries a serious allergy risk for anyone with tree-nut allergies — this is a major food allergen in the United States. A small number of people taking black currant seed oil developed mild diarrhea a few days after starting it.

Side effects, ingredient by ingredient Black Currant Sweet Almond Thyroid Extract

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 3 matched ingredients can interact with medications — Black Currant, Thyroid Extract.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 2,042 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.

Before taking ThyroSupport, double-check with your doctor or pharmacist if you're on levothyroxine (Synthroid) or other thyroid medications — thyroid extract can increase your hormone levels and side effects. If you take anticoagulants or antiplatelet drugs (blood thinners like warfarin or aspirin), or if you're on phenothiazines (antipsychotic medications), let them know about this product because black currant may increase bleeding risk or lower your seizure threshold.

If you're on antacids or calcium supplements, note that thyroid extract may be less well absorbed when taken alongside these.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.

If you have thyroid disease or take thyroid medication, don't start this product without talking to your doctor first — the thyroid extract could dangerously raise your hormone levels. Anyone on blood thinners, antipsychotic medications, or who has a tree-nut allergy should also check with their doctor or pharmacist before use.

The effectiveness for thyroid support isn't well established in the data we hold, so discuss whether this is the right choice for your situation.

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

Assessment coverage: 3 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Sep 21, 2018.

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 ThyroSupport, straight from the product label.

Brand Dr. Garber's
Barcode (UPC) 189806000237
Net contents 2 fl. Oz.; 60 mL
Market status On market
Date entered into DSLD Sep 21, 2018
DSLD ID 181172
Product type Other Combinations
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Children 4 or More Years of Age, 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 ThyroSupport by Dr. Garber's, 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 mL
Maximum serving Sizes:
1 mL
Servings per container
60
UPC/BARCODE
189806000237
IngredientAmount% DV
Proprietary Blend83 mg--
Black Currant0 NP--
Bloodwig Dogberry0 NP--
Sweet Almond0 NP--
Native Gold0 NP--
Thyroid extract0 NP--

Other ingredients: Glycerin, purified Water, Alcohol

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.
Precautions

Do not use if imprinted cap seal is broken or missing

Children should take this product only as instructed by a health care practitioner.

Seals/Symbols

GMO Free Gluten Free GMP Good Manufacturing Practice Product

Formulation

GMO Free Gluten Free

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.

General Statements

Natural solutions for optimal thyroid health.

Heal different

Benefit: Supports healthy thyroid function.

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Suggested use: Take 1.0 ml, directly by mouth or in a small amount of water, twice daily or as instructed by a health care practitioner. Children should take this product only as instructed by a health care practitioner.

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

See for yourself

ThyroSupport by Dr. Garber's label

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

ThyroSupport 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 ThyroSupport by Dr. Garber's

These are the 5 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 mL Dosage formLiquid 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.

Proprietary Blend

83 mg per serving

Other (inactive) ingredients: Glycerin, Purified Water, Alcohol. These complete the product’s ingredient list but are not active constituents.

Interaction report

ThyroSupport by Dr. Garber's Drug Interactions

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 Go to the checker
2,041Drugs
143 Moderate 1,898 Minor

Ingredients driving the most interactions

Thyroid extract 2,022
Black Currant 140

Individual Drug Interactions

The ingredients in ThyroSupport interact with 2,041 drugs. Click any drug to see the details.

2 of the 5 ingredients in ThyroSupport interact with drugs. Each result below shows which ingredient is responsible. Thyroid extract Black Currant

Each ingredient & the kinds of drugs it affects

For each ingredient in ThyroSupport 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.

Thyroid extract2 drug types · 2,022 drugs

Levothyroxine (Synthroid, Others)

Theoretically, thyroid extract might increase the effects and adverse effects of levothyroxine.
Thyroid extract contains triiodothyronine (T3) and thyroxine (T4). Taking thyroid extract increases blood levels of T3 and T4, in some cases to abnormally high levels.

Likelihood Possible Evidence D
Oral Drugs

Food and medications can interfere with thyroid hormone absorption. Some foods, particularly those high in fiber or containing certain minerals like calcium or iron, can bind to thyroid hormones and reduce their absorption in the digestive tract. Additionally, taking thyroid medications with certain drugs, like antacids or calcium supplements, can hinder the effectiveness of the thyroid medication, necessitating adjustments in dosage or timing. Prescription thyroid medications, such as Synthroid, are recommended to be taken on an empty stomach, at least 30 minutes before food and other medications, for optimal absorption.

Likelihood Likely Evidence A
Thyroid extract full monograph & interactions

Black Currant2 drug types · 140 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.
Gamma-linolenic acid (GLA), a constituent of black currant seed oil, appears to have antiplatelet effects.

Likelihood Possible Evidence D
Phenothiazines

Theoretically, black currant seed oil might increase the risk of seizure in patients receiving phenothiazines.
Black currant seed oil contains gamma-linolenic acid (GLA). There is some concern that taking supplements containing GLA might cause seizures, or lower the seizure threshold, when taken with phenothiazines, although there is no evidence that black currant seed oil causes seizures. In one report, three patients with schizophrenia who had received phenothiazines developed EEG changes suggestive of temporal lobe epilepsy after starting treatment with GLA, although none experienced an actual seizure. In another report, two patients with schizophrenia who were stabilized on phenothiazines developed seizures when evening primrose 4 grams daily, which contains GLA, was added. One of these patients had a prior history of seizures.

Likelihood Possible Evidence D
Black Currant full monograph & interactions
The maker

Brand information

Manufacturer and brand details for ThyroSupport, from the product label.

Dr. Garber's

See all Dr. Garber's products
Name
Dr. Garber's LLC
City
Santa Fe
State
NM
ZipCode
87501
Phone Number
877-374-2723
Web Address
www.drgarbers.com
Pharmacist Counseling Corner

ThyroSupport by Dr. Garber's: Common Questions

Does ThyroSupport by Dr. Garber's interact with any medications?
Yes. Based on its ingredients, ThyroSupport has a known interaction with 2,041 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
ThyroSupport contains 5 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.
Is this safe if I'm pregnant or breastfeeding?
No — the safety data advises against thyroid extract in pregnancy because thyroid hormone levels must be carefully controlled, and it should be avoided while breastfeeding unless your doctor directs you to use it. Talk with your doctor or pharmacist about whether this product is right for you before starting it.
Can I take this if I have a nut allergy?
Sweet almond is a tree nut and a major food allergen in the United States. If you have a tree-nut allergy, do not use this product — serious allergic reactions are possible. Check with your doctor if you're unsure about your allergy status.
What does thyroid extract do?
Thyroid extract contains thyroid hormones (T3 and T4) that increase blood levels of these hormones. However, the effectiveness of this product for hypothyroidism or thyroid disease hasn't been established in the data we hold, and the hormone amounts in OTC extracts can vary unpredictably.
What side effects might I get?
In a small study, a few people taking black currant seed oil reported mild diarrhea a few days after starting. Thyroid extract can raise thyroid hormone levels, sometimes abnormally high, which may cause symptoms like rapid heartbeat, anxiety, or tremor. In rare cases, dangerously high levels can lead to thyroid storm.
Does black currant really help with colds or respiratory infections?
Black currant shows insufficient reliable evidence for upper respiratory infections and cough in the data we hold, so we can't confirm it works for those purposes.
Will this interfere with my other medications?
Yes — if you take thyroid medication, blood thinners, antipsychotics, antacids, or calcium supplements, this product may interact. Use the search tool on this page to check your exact medications, and discuss the results with your doctor or pharmacist before starting.

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.

ThyroSupport label
Go deeper

The Full Monographs Behind ThyroSupport’s Ingredients

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

Herb & supplement monograph

Black Currant

Interacts with 140 drugs

Black currant is a nutritious berry that is rich in vitamin C and antioxidants, and its seed oil contains the omega-6 fatty acid GLA. While it is enjoyed safely as a food and is popular as a...

Read the full Black Currant monograph → Herb & supplement monograph

Sweet Almond

Sweet almonds are a nutritious tree nut rich in healthy fats, fiber, protein, vitamin E, and minerals, and they are generally safe and healthy to eat as part of a balanced diet. Almond oil i...

Read the full Sweet Almond monograph → Herb & supplement monograph

Thyroid Extract

Interacts with 2,022 drugs

Thyroid extract supplements are made from dried animal thyroid gland and may contain real thyroid hormones (T3 and T4), but the amounts in over-the-counter products are not standardized and...

Read the full Thyroid Extract monograph →
Sources

Sources & How We Checked

ThyroSupport'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 16 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.

Black Currant 6 references
  1. Guivernau M, Meza N, Barja P, Roman O. Clinical and experimental study on the long-term effect of dietary gamma-linolenic acid on plasma lipids, platelet aggregation, thromboxane formation, and prostacyclin production. Prostaglandins Leukot Essent Fatty A PubMed
  2. Fa-lin Z, Zhen-yu W, Yan H, et al. Efficacy of blackcurrant oil soft capsule, a Chinese herbal drug, in hyperlipidemia treatment. Phytother Res 2010;24 Suppl 2:S209-13. PubMed
  3. Holman CP and Bell AF. A trial of evening primrose oil in the treatment of chronic schizophrenia. J Orhtomolecular Psych 1983;12:302-304.
  4. Vaddadi KS. The use of gamma-linolenic acid and linoleic acid to differentiate between temporal lobe epilepsy and schizophrenia. Prostaglandins Med 1981;6(4):375-379. PubMed
  5. Norred, C. L. and Brinker, F. Potential coagulation effects of preoperative complementary and alternative medicines. Alt Ther 2001;7(6):58-67.
  6. Puri BK. The safety of evening primrose oil in epilepsy. Prostaglandins Leukotrienes Essential Fatty Acids 2007;77:101-3. PubMed

See these in context on the Black Currant monograph →

Sweet Almond 4 references
  1. Motaharifard MS, Effatpanah M, Karimi M, et al. Effect of sweet almond syrup versus methylphenidate in children with ADHD: A randomized triple-blind clinical trial. Complement Ther Clin Pract. 2019;36:170-175. PubMed
  2. Simon D, Nobbe S, Nägeli M, et al. Short- and long-term effects of two emollients on itching and skin restoration in xerotic eczema. Dermatol Ther. 2018;31(6):e12692. PubMed
  3. Food and Drug Administration. Food Allergen Labeling and Consumer Protection Act of 2004 (FALCPA); Public Law 108-282, Title II. Accessed on May 19, 2021. Available at: https://www.fda.gov/food/food-allergensgluten-free-guidance-documents-regulatory-infor
  4. Salama M, Tebben PJ, Al Nofal A. An infant developing hypercalcemia and hypophosphatemia due to the use of exclusively almond milk. J Pediatr Endocrinol Metab 2024;37(4):375-379. PubMed

See these in context on the Sweet Almond monograph →

Thyroid Extract 6 references
  1. Benvenga, S., Trimarchi, F., Barbera, C., Costante, G., Morabito, S., Barberio, G., and Consolo, F. Circulating immunoglobulin E (IgE) antibodies to L-thyroxine in a euthyroid patient with multinodular goiter and allergic rhinitis. J Endocrinol Invest 198 PubMed
  2. Gerard, P., Malvaux, P., and De Visscher, M. Accidental poisoning with thyroid extract treated by exchange transfusion. Arch Dis Child 1972;47(256):981-982. PubMed
  3. Tofahrn, J. and Hundeiker, M. [Nevus eruption following thyroidin with spontaneous involution]. Z Hautkr 1976;51(15):617-620.
  4. Rees-Jones RW, Larsen PR. Triiodothyronine and thyroxine content of desiccated thyroid tablets. Metabolism 1977;26(11):1213-1218. PubMed
  5. Jackson IM, Cobb WE. Why does anyone still use desiccated thyroid USP? Am J Med 1978;64(2):284-8. PubMed
  6. Jha S, Waghdhare S, Reddi R, Bhattacharya P. Thyroid storm due to inappropriate administration of a compounded thyroid hormone preparation successfully treated with plasmapheresis. Thyroid. 2012;22(12):1283-6. PubMed

See these in context on the Thyroid Extract monograph →

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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