Gf Thyroid Ingredients & Drug Interactions
by Systemic Formulas Bio Function
What is this page for?
First and foremost: checking Gf Thyroid 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
Gf Thyroid is a dietary supplement by Systemic Formulas Bio Function with 8 active ingredients. Its ingredients are commonly taken for thyroid support, iodine source, weight management.Based on those ingredients, 959 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Kelp, Pata de Vaca, Irish Moss. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Gf Thyroid by Systemic Formulas Bio Function
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HelloPharmacist Scorecard of Gf Thyroid by Systemic Formulas Bio Function
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.
What’s inside
Low disclosure
Gf Thyroid contains 8 ingredients, of which kelp, Irish moss (sea moss), pata de vaca, and pumpkin seed (Cucurbita Pepo) are the active ones — the rest are a proprietary blend, homeopathic thyroid dilution, and tissue extracts. Kelp and Irish moss are both seaweed sources of iodine, a mineral needed for thyroid function.
Pata de vaca is a plant traditionally used in herbal medicine, and pumpkin seed has a history in folk remedies for urinary and reproductive health. The product also contains three inactive ingredients: gelatin (the capsule), lactose, and leucine (an amino acid used as an excipient).
Does it work?
Not established
The evidence for what this product claims to do is not established in the data we hold. Kelp and Irish moss show insufficient reliable evidence for aging skin, heart disease, constipation, diarrhea, and indigestion.
Pata de vaca has insufficient evidence for diabetes. Pumpkin seed is possibly effective for benign prostate enlargement, but the data on the other uses listed (hair loss, bladder pain, parasite infection, urinary tract infections) is insufficient.
Because this is a combination product with a proprietary blend, we cannot assess how the ingredients work together or their individual doses.
How safe is it?
Well-documented data
Orally, kelp and Irish moss may be unsafe due to their high iodine content, which can disrupt thyroid function and cause goiter, overactive thyroid (hyperthyroidism), or underactive thyroid (hypothyroidism). Kelp carries a rare serious risk of thyroid cancer.
Both seaweeds can also concentrate heavy metals from ocean water. One case report linked a kelp-containing supplement to heart palpitations and dangerous heart rhythms in a young adult, though it's unclear whether kelp alone was responsible.
Pumpkin is generally well tolerated when eaten as food; concentrated seed supplements may cause abdominal discomfort, diarrhea, nausea, or vomiting, and rare anaphylaxis has been reported. Two case reports describe severe hair loss after eating wild or bitter-tasting pumpkin or squash, linked to high levels of a compound called cucurbitacin.
During pregnancy, the iodine content in kelp and Irish moss poses a risk — the safety data advises against this product. Iodine passes into breast milk and may harm the baby's thyroid, so breastfeeding mothers should avoid it.
Pata de vaca has insufficient safety information; the data advises against it in pregnancy and breastfeeding. Pumpkin as food is fine in pregnancy and breastfeeding, but safety of concentrated supplements during these times is not well studied.
Meds to double-check
Moderate interaction found
Check with your doctor or pharmacist before taking this product if you use lithium, antithyroid drugs (like propylthiouracil or methimazole), thyroid hormone replacement, amiodarone (a heart medication), antidiabetes drugs, or any blood thinner (anticoagulant) or antiplatelet medication. The iodine-rich ingredients kelp and Irish moss can alter how these drugs work, and pumpkin and kelp may raise lithium levels or compound blood-sugar-lowering effects.
No interactions are documented for three of the ingredients we were unable to check.
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.
This product carries real interaction risks if you take lithium, thyroid medications, antithyroid drugs, amiodarone, or antidiabetes medications — talk with your doctor or pharmacist before starting. If you have any thyroid condition or are pregnant or breastfeeding, check with your healthcare provider first.
The iodine content is high and can shift your thyroid function in either direction depending on your history. For anyone else considering it, keep in mind the evidence for its claimed benefits is not yet established.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 4 of 8 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated May 24, 2013.
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
General information
Key facts about Gf Thyroid, straight from the product label.
| Brand | Systemic Formulas Bio Function |
|---|---|
| Barcode (UPC) | 635585003919 |
| Net contents | 60 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | May 24, 2013 |
| DSLD ID | 21882 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years) |
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 Gf Thyroid by Systemic Formulas Bio Function, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Proprietary Blend | 1060 mg | -- |
| Kelp | 0 NP | -- |
| Irish Moss | 0 NP | -- |
| Thyroid 6x Dilution | 0 NP | -- |
| Pata de Vaca | 0 NP | -- |
| Abutua | 0 NP | -- |
| Cucurbita Pepo | 0 NP | -- |
| RNA/DNA Lung Factors | 0 NP | -- |
| RNA/DNA Thymus Factors | 0 NP | -- |
Other ingredients: Gelatin, Lactose, Leucine
Tap any ingredient to jump to its full detail below.
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.
Storage
Keep away from Heat Sunlight
General Statements
Builds and balances the thyroid gland; helps adjust changes due to climate/jet lag.
SOLD THROUGH PROFESSIONALS
#39
MADE IN U.S.A.
F/12
FDA Disclaimer Statement
This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any diseases.
Suggested/Recommended/Usage/Directions
DIRECTIONS FOR NUTRITIONAL USE: 1-2 capsules, up to twice a day, for 1-3 months, or as directed. Then, take as needed for maintenance. Increase the amount of liquids you drink each day while taking this product.
FDA Statement of Identity
Dietary Supplement
Precautions
KEEP OUT OF REACH OF CHILDREN.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Gf Thyroid by Systemic Formulas Bio Function label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
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)The Ingredients in Gf Thyroid by Systemic Formulas Bio Function
These are the 8 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule 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
- › Kelp
- › Irish Moss
- › Thyroid 6x Dilution
- › Pata de Vaca
- › Abutua
- › Cucurbita Pepo
- › RNA/DNA Lung Factors
- › RNA/DNA Thymus Factors
Other (inactive) ingredients: Gelatin, Lactose, Leucine. These complete the product’s ingredient list but are not active constituents.
Gf Thyroid by Systemic Formulas Bio Function Drug Interactions
HelloPharmacist Interaction Report
Gf Thyroid by Systemic Formulas Bio Function interacts with medications, primarily through its kelp and Irish moss content — both high in iodine.
The most serious concern is with lithium (used for bipolar disorder): kelp can trigger high thyroid hormone levels (hyperthyroidism) in patients on lithium, and pumpkin (another ingredient here) may raise lithium levels in the blood by reducing how your kidneys clear it. Both are moderate-severity interactions requiring close monitoring.
Read the full breakdown — every affected drug type, severity by severity
The iodine in kelp and Irish moss also affects how antithyroid drugs, thyroid hormone replacements, and amiodarone (a heart rhythm medication) work. Because iodine in high doses can cause either overactive or underactive thyroid depending on your history, these combinations need careful supervision.
Kelp may also theoretically interfere with how your liver processes several drug families (substrates of CYP2D6, CYP2C9, and CYP3A4 enzymes), though no human cases have been reported. A minor theoretical concern exists with blood thinners (anticoagulants) and antiplatelet drugs, since kelp contains fucoidan, which has anticoagulant properties in the lab — though clinical evidence of significant bleeding risk is limited.
One ingredient, pata de vaca, interacts with antidiabetes medications: animal data suggests it may lower blood sugar, which could compound the effect of diabetes drugs and raise the risk of low blood sugar (hypoglycemia). We could not check three other ingredients (Thyroid 6x Dilution, Abutua, and RNA/DNA Lung and Thymus Factors) because we hold no interaction data for them.
Altogether, these interactions span 960 individual medications.
Use the search tool on this page to look up your exact medications, and talk with your doctor or pharmacist before starting this product.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Gf Thyroid?
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 checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Gf Thyroid interact with 959 drugs. Click any drug to see the details.
4 of the 8 ingredients in Gf Thyroid interact with drugs. Each result below shows which ingredient is responsible. Kelp Pata de Vaca Irish Moss Cucurbita Pepo
AcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Acarbose interactionAcetohexamideDymelor
How Acetohexamide interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Acetohexamide interactionAlbiglutideTanzeum
How Albiglutide interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Albiglutide interactionAlogliptinNesina
How Alogliptin interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Alogliptin interactionKelpCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2c8 (cyp2c8) Substrates Minor
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Kelp + Alogliptin interactionAlogliptin, MetforminKazano
How Alogliptin, Metformin interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Alogliptin, Metformin interactionAlogliptin, PioglitazoneOseni
How Alogliptin, Pioglitazone interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Alogliptin, Pioglitazone interactionKelpCytochrome P450 2c8 (cyp2c8) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP2C8 substrates might increase the risk for adverse effects.
Read the full Kelp + Alogliptin, Pioglitazone interactionAmiodaroneCordarone, Pacerone
How Amiodarone interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
KelpAmiodarone (cordarone), Cytochrome P450 2c8 (cyp2c8) Substrates +1 Moderate
Interaction Summary
Theoretically, combining Fucus vesiculosus with amiodarone might cause excessively high iodine levels.
Read the full Kelp + Amiodarone interactionIrish MossAmiodarone (cordarone) Moderate
Interaction Summary
Theoretically, combining sea moss with amiodarone might cause excessively high iodine levels.
Read the full Irish Moss + Amiodarone interactionAntidiabetes, Dipeptidyl Peptidase-4 (dpp-iv) InhibitorGlyxambi
How Antidiabetes, Dipeptidyl Peptidase-4 (dpp-iv) Inhibitor interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Antidiabetes, Dipeptidyl Peptidase-4 (dpp-iv) Inhibitor interactionCanagliflozinInvokana
How Canagliflozin interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Canagliflozin interactionCanagliflozin, MetforminInvokamet
How Canagliflozin, Metformin interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Canagliflozin, Metformin interactionCanagliflozin, Metformin HydrochlorideInvokamet XR
How Canagliflozin, Metformin Hydrochloride interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Canagliflozin, Metformin Hydrochloride interactionCarbimazoleNeo-Mercazole
How Carbimazole interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
KelpAntithyroid Drugs Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of antithyroid drugs.
Read the full Kelp + Carbimazole interactionIrish MossAntithyroid Drugs Moderate
Interaction Summary
Due to its iodine content, sea moss might alter the effects of antithyroid drugs.
Read the full Irish Moss + Carbimazole interactionChlorpropamideChlorpropam, Diabinese
How Chlorpropamide interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Chlorpropamide interactionKelpCytochrome P450 2d6 (cyp2d6) Substrates Minor
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP2D6 substrates might alter the effects of these substrates.
Read the full Kelp + Chlorpropamide interactionConjugated EstrogensCenestin, Enjuvia, Premarin, Premarin Vaginal Cream
How Conjugated Estrogens interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
KelpCytochrome P450 3a4 (cyp3a4) Substrates, Thyroid Hormone Moderate
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Kelp + Conjugated Estrogens interactionIrish MossThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, sea moss might alter the effects of thyroid hormone.
Read the full Irish Moss + Conjugated Estrogens interactionDapagliflozinFarxiga
How Dapagliflozin interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Dapagliflozin interactionDapagliflozin Propanediol, MetforminXigduo XR
How Dapagliflozin Propanediol, Metformin interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Dapagliflozin Propanediol, Metformin interactionDapagliflozin Propanediol, Saxagliptin HydrochlorideQtern
How Dapagliflozin Propanediol, Saxagliptin Hydrochloride interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Dapagliflozin Propanediol, Saxagliptin Hydrochloride interactionDapagliflozin, Metformin Hydrochloride, Saxagliptin HydrochlorideQternmet XR
How Dapagliflozin, Metformin Hydrochloride, Saxagliptin Hydrochloride interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Dapagliflozin, Metformin Hydrochloride, Saxagliptin Hydrochloride interactionKelpCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Kelp + Dapagliflozin, Metformin Hydrochloride, Saxagliptin Hydrochloride interactionDasiglucagon HydrochlorideZegalogue
How Dasiglucagon Hydrochloride interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Dasiglucagon Hydrochloride interactionDesiccated Thyroid ExtractWesthroid, WP Thyroid
How Desiccated Thyroid Extract interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
KelpThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Kelp + Desiccated Thyroid Extract interactionIrish MossThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, sea moss might alter the effects of thyroid hormone.
Read the full Irish Moss + Desiccated Thyroid Extract interactionDesiccated Thyroid Extract (prescription Drug)Nature-Throid, Thyrar
How Desiccated Thyroid Extract (prescription Drug) interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
KelpThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Kelp + Desiccated Thyroid Extract (prescription Drug) interactionIrish MossThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, sea moss might alter the effects of thyroid hormone.
Read the full Irish Moss + Desiccated Thyroid Extract (prescription Drug) interactionDextrothyroxineCholoxin
How Dextrothyroxine interacts with Gf Thyroid — through 2 ingredients. Tap an ingredient for the detail:
KelpThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Kelp + Dextrothyroxine interactionIrish MossThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, sea moss might alter the effects of thyroid hormone.
Read the full Irish Moss + Dextrothyroxine interactionDulaglutideTrulicity
How Dulaglutide interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Dulaglutide interactionEmpagliflozinJardiance
How Empagliflozin interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Empagliflozin interactionEmpagliflozin, Linagliptin, Metformin HydrochlorideTrijardy XR
How Empagliflozin, Linagliptin, Metformin Hydrochloride interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Empagliflozin, Linagliptin, Metformin Hydrochloride interactionEmpagliflozin, MetforminSynjardy
How Empagliflozin, Metformin interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Empagliflozin, Metformin interactionEmpagliflozin, Metformin HydrochlorideSynjardy XR
How Empagliflozin, Metformin Hydrochloride interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Empagliflozin, Metformin Hydrochloride interactionErtugliflozinSteglatro
How Ertugliflozin interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Ertugliflozin interactionErtugliflozin, Metformin HydrochlorideSegluromet
How Ertugliflozin, Metformin Hydrochloride interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Ertugliflozin, Metformin Hydrochloride interactionExenatideBydureon, Byetta
How Exenatide interacts with Gf Thyroid — through 1 ingredient. Tap an ingredient for the detail:
Pata De VacaAntidiabetes Drugs Moderate
Interaction Summary
Animal research suggests that pata de vaca may have hypoglycemic effects.
Read the full Pata De Vaca + Exenatide interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Gf Thyroid 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.
Kelp
Amiodarone (Cordarone)
Theoretically, combining Fucus vesiculosus with amiodarone might cause excessively high iodine levels.
Fucus vesiculosus contains high concentrations of iodine. Amiodarone contains 37.3% iodine and can increase iodine levels. Concomitant use might increase the risk of having excessive iodine levels and adversely affecting thyroid function. Monitor thyroid function.
Antithyroid Drugs
Due to its iodine content, Fucus vesiculosus might alter the effects of antithyroid drugs.
Fucus vesiculosus contains high concentrations of iodine. Iodine in high doses has been reported to cause both hyperthyroidism and hypothyroidism, depending on the individual's past medical history. Taking Fucus vesiculosus while using antithyroid drugs could alter the effects of the antithyroid drugs.
Lithium
Concomitant use of Fucus vesiculosus and lithium has resulted in hyperthyroidism.
There is a case of hyperthyroidism occurring in a patient taking Fucus vesiculosus and lithium. Monitor thyroid hormones closely in patients taking lithium and Fucus vesiculosus concomitantly.
Thyroid Hormone
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Fucus vesiculosus contains high concentrations of iodine. Iodine in high doses has been reported to cause both hyperthyroidism and hypothyroidism, depending on the individual's past medical history. Taking Fucus vesiculosus while using thyroid hormone could alter the effects of thyroid hormone.
Anticoagulant/Antiplatelet Drugs
Theoretically, taking Fucus vesiculosus with antiplatelet or anticoagulant drugs might increase the risk of bruising and bleeding.
In vitro evidence suggests that a constituent of Fucus vesiculosus, known as fucoidan, has anticoagulant effects. However, in clinical research, fucoidan does not seem to have significant anticoagulant activity when taken orally, possibly due to poor absorption.
Cytochrome P450 2C8 (Cyp2C8) Substrates
Theoretically, concomitant use of Fucus vesiculosus with CYP2C8 substrates might increase the risk for adverse effects.
In vitro research shows that fucoidan, a constituent of Fucus vesiculosus, inhibits CYP2C8. This interaction has not been reported in humans.
Cytochrome P450 2C9 (Cyp2C9) Substrates
Theoretically, concomitant use of Fucus vesiculosus with CYP2C9 substrates might increase the risk for adverse effects.
In vitro research shows that fucoidan, a constituent of Fucus vesiculosus, inhibits CYP2C9. This interaction has not been reported in humans.
Cytochrome P450 2D6 (Cyp2D6) Substrates
Theoretically, concomitant use of Fucus vesiculosus with CYP2D6 substrates might alter the effects of these substrates.
In vitro research shows that fucoidan, a constituent of Fucus vesiculosus, both inhibits and induces CYP2D6. This interaction has not been reported in humans.
Cytochrome P450 3A4 (Cyp3A4) Substrates
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
In vitro research shows that fucoidan, a constituent of Fucus vesiculosus, inhibits CYP3A4. This interaction has not been reported in humans.
Pata de Vaca
Antidiabetes Drugs
Animal research suggests that pata de vaca may have hypoglycemic effects. However, preliminary clinical research shows that pata de vaca does not reduce blood glucose levels. Until more is known, use with caution. Theoretically, concomitant use of pata de vaca with antidiabetes drugs might affect glucose control and increase the risk of hypoglycemia. Dose adjustments to diabetes medications might be necessary. Some antidiabetes drugs include glimepiride (Amaryl), glyburide (DiaBeta, Glynase PresTab, Micronase), insulin, metformin (Glucophage), pioglitazone (Actos), rosiglitazone (Avandia), and others.
Irish Moss
Amiodarone (Cordarone)
Theoretically, combining sea moss with amiodarone might cause excessively high iodine levels.
Amiodarone contains 37.3% iodine and can increase iodine levels. Concomitant use with sea moss, which contains approximately 4-7 mcg of iodine per gram, might increase the risk of adverse effects from iodine, including altered thyroid function.
Antithyroid Drugs
Due to its iodine content, sea moss might alter the effects of antithyroid drugs.
Sea moss contains approximately 4-7 mcg of iodine per gram. Iodine in high doses has been reported to cause both hyperthyroidism and hypothyroidism, depending on the individual's past medical history. Taking sea moss could theoretically alter the effects of antithyroid drugs.
Thyroid Hormone
Due to its iodine content, sea moss might alter the effects of thyroid hormone.
Sea moss contains approximately 4-7 mcg of iodine per gram. Iodine in high doses has been reported to cause both hyperthyroidism and hypothyroidism, depending on the individual's past medical history. Taking sea moss could theoretically alter the effects of thyroid hormone.
Cucurbita Pepo
Lithium
Pumpkin might reduce excretion and increase levels of lithium.
Pumpkin is thought to have diuretic properties. Theoretically, this might reduce excretion and increase levels of lithium. The dose of lithium might need to be decreased.
Brand information
Manufacturer and brand details for Gf Thyroid, from the product label.
Systemic Formulas Bio Function
See all Systemic Formulas Bio Function products- Name
- Systemic Formulas Inc.
- Street Address
- P.O.Box 1516
- City
- Ogden
- State
- UT
- ZipCode
- 84402
- Web Address
- www.systemicformulas.com
Gf Thyroid by Systemic Formulas Bio Function: Common Questions
Does Gf Thyroid by Systemic Formulas Bio Function interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Will this interact with my thyroid medication?
Can I take this if I'm on lithium?
Is it safe during pregnancy or breastfeeding?
What does kelp actually do in this formula?
Can this help with diabetes?
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The Full Monographs Behind Gf Thyroid’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Fucus Vesiculosus
Interacts with 891 drugsFucus vesiculosus (bladderwrack) is a brown seaweed rich in iodine that has been used traditionally for thyroid concerns, weight, and skin. There is little solid human evidence to support mo...
Read the full Fucus Vesiculosus monograph → Herb & supplement monographSea Moss
Interacts with 22 drugsSea moss is a type of red seaweed that is naturally rich in iodine and several minerals, and it is popular as a 'whole-food' supplement. Strong human evidence for most of its health claims i...
Read the full Sea Moss monograph → Herb & supplement monographPata De Vaca
Interacts with 86 drugsPata de Vaca is a South American plant whose leaves are traditionally brewed as a tea to help support blood sugar, earning it the nickname 'vegetable insulin.' Human evidence is very limited...
Read the full Pata De Vaca monograph → Herb & supplement monographPumpkin
Interacts with 1 drugPumpkin is a nutritious squash, and its seeds and seed oil are the parts most often used as supplements, mainly for urinary and prostate symptoms. The evidence for these uses is limited and...
Read the full Pumpkin monograph →Sources & How We Checked
Gf Thyroid'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.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
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 33 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.
Fucus Vesiculosus 15 references
- Goodman GA, Rall TW, Nies AS, Taylor P. The Pharmacological Basis of Therapeutics, 9th ed.
- 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.
- Phaneuf D, Cote I, Dumas P, et al. Evaluation of the contamination of marine algae (Seaweed) from the St. Lawrence River and likely to be consumed by humans. Environ Res 1999;80:S175-S182. PubMed
- Durig J, Bruhn T, Zurborn KH, et al. Anticoagulant fucoidan fractions from Fucus vesiculosus induce platelet activation in vitro. Thromb Res 1997;85:479-91. PubMed
- Conz PA, La Greca G, Benedetti P, et al. Fucus vesiculosus: a nephrotoxic alga? Nephrol Dial Transplant 1998;13:526-7.
- Ohye H, Fukata S, Kanoh M, et al. Thyrotoxicosis caused by weight-reducing herbal medicines. Arch Intern Med 2005;165:831-4. PubMed
- Okamura K, Inoue K, Omae T. A case of Hashimoto's thyroiditis with thyroid immunological abnormality manifested after habitual ingestion of seaweed. Acta Endocrinol (Copenh) 1978;88:703-12. PubMed
- Agarwal SC, Crook JR, Pepper CB. Herbal remedies -- how safe are they? A case report of polymorphic ventricular tachycardia/ventricular fibrillation induced by herbal medication used for obesity. Int J Cardiol 2006;106:260-1. PubMed
- Sterling JB, Heymann WR. Potassium iodide in dermatology: a 19th century drug for the 21st century-uses, pharmacology, adverse effects, and contraindications. J Am Acad Dermatol 2000;43:691-7. PubMed
- Catania, M. A., Oteri, A., Caiello, P., Russo, A., Salvo, F., Giustini, E. S., Caputi, A. P., and Polimeni, G. Hemorrhagic cystitis induced by an herbal mixture. South.Med.J. 2010;103(1):90-92. PubMed
- Cumashi, A., Ushakova, N. A., Preobrazhenskaya, M. E., D'Incecco, A., Piccoli, A., Totani, L., Tinari, N., Morozevich, G. E., Berman, A. E., Bilan, M. I., Usov, A. I., Ustyuzhanina, N. E., Grachev, A. A., Sanderson, C. J., Kelly, M., Rabinovich, G. A., I
- Irhimeh, M. R., Fitton, J. H., and Lowenthal, R. M. Pilot clinical study to evaluate the anticoagulant activity of fucoidan. Blood Coagul.Fibrinolysis 2009;20(7):607-610. PubMed
- Arbaizar, B. and Llorca, J. [Fucus vesiculosus induced hyperthyroidism in a patient undergoing concomitant treatment with lithium]. Actas Esp.Psiquiatr. 2011;39(6):401-403.
- Church FC, Meade JB, Treanor RE, and et al. Antithrombin activity of fucoidan. The interaction of fucoidan with heparin cofactor II, antithrombin III, and thrombin. J Biol Chem 2-25-1989;264(6):3618-3623. DOI
- Mathew L, Burney M, Gaikwad A, et al. Preclinical evaluation of safety of fucoidan extracts from Undaria pinnatifida and Fucus vesiculosus for use in cancer treatment. Integr Cancer Ther 2017;16(4):572-84.
Sea Moss 3 references
- Darias-Rosales J, Rubio C, Gutiérrez ÁJ, Paz S, Hardisson A. Risk assessment of iodine intake from the consumption of red seaweeds (Palmaria palmata and Chondrus crispus). Environ Sci Pollut Res Int 2020;27(36):45737-45741. PubMed
- U.S. Department of Agriculture (USDA). Agricultural Research Service. FoodData Central. Seaweed, irishmoss, raw. April 2019. Available at: https://fdc.nal.usda.gov/fdc-app.html#/food-details/168456/nutrients. Accessed Aug. 30, 2022.
- Palmieri B, Vadalà M, Laurino C. Clinical effects of overwintered-stressed Chondrus Crispus and non-overwintered-stressed Chondrus crispus dietary supplementations. Asian J Med Sci. 2018; 9(6): 7-13. DOI
Pata De Vaca 10 references
- Russo EM, Reichelt AA, De Sa JR, et al. Clinical trial of Myrcia uniflora and Bauhinia forficata leaf extracts in normal and diabetic patients. Braz J Med Biol Res 1990;23(1):11-20.
- da Cunha AM, Menon S, Menon R, et al. Hypoglycemic activity of dried extracts of Bauhinia forficata Link. Phytomedicine 2010;17(1):37-41. PubMed
- Lino Cde S, Diogenes JP, Pereira BA, et al. Antidiabetic activity of Bauhinia forficata extracts in alloxan-diabetic rats. Biol Pharm Bull 2004;27(1):125-7. PubMed
- Silva FR, Szpoganicz B, Pizzolatti MG, et al. Acute effect of Bauhinia forficata on serum glucose levels in normal and alloxan-induced diabetic rats. J Ethnopharmacol 2002;83(1-2):33-7. PubMed
- Pepato MT, Keller EH, Baviera AM, et al. Anti-diabetic activity of Bauhinia forficata decoction in streptozotocin-diabetic rats. J Ethnopharmacol 2002;81(2):191-7. PubMed
- Jorge AP, Horst H, de Sousa E, et al. Insulinomimetic effects of kaempferitrin on glycaemia and on 14C-glucose uptake in rat soleus muscle. Chem Biol Interact 2004;149(2-3):89-96. PubMed
- de Sousa E, Zanatta L, Seifriz I, et al. Hypoglycemic effect and antioxidant potential of kaempferol-3,7-O-(alpha)-dirhamnoside from Bauhinia forficata leaves. J Nat Prod 2004;67(5):829-32.
- Vasconcelos F, Sampaio SV, Garofalo MA, et al. Insulin-like effects of Bauhinia forficata aqueous extract upon Tityus serrulatus scorpion envenoming. J Ethnopharmacol 2004;95(2-3):385-92. PubMed
- Córdova Mariángel P, Avello Lorca M, Morales Leon F, et al. Effects of Bauhinia forficata link tea on lipid profile in diabetic patients. J Med Food. 2019;22(3):321-323.
- Tonelli CA, de Oliveira SQ, Silva Vieira AAD, et al. Clinical efficacy of capsules containing standardized extract of Bauhinia forficata Link (pata-de-vaca) as adjuvant treatment in type 2 diabetes patients: A randomized, double blind clinical trial. J Et PubMed
Pumpkin 5 references
- Marks L, Partin AW, Epstein JI, et al. Effects of a saw palmetto herbal blend in men with symptomatic benign prostatic hyperplasia. J Urol 2000;163:1451-6. DOI
- Cho YH, Lee SY, Jeong DW, et al. Effect of pumpkin seed oil on hair growth in men with androgenetic alopecia: a randomized, double-blind, placebo-controlled trial. Evid Based Complement Alternat Med 2014;2014:549721. PubMed
- Vahlensieck W, Theurer C, Pfitzer E, Patz B, Banik N, Engelmann U. Effects of pumpkin seed in men with lower urinary tract symptoms due to benign prostatic hyperplasia in the one-year, randomized, placebo-controlled GRANU study. Urol Int 2015;94(3):286-95 PubMed
- Assouly P. Hair loss associated with cucurbit poisoning. JAMA Dermatol. 2018 May 1;154(5):617-618. PubMed
- Gawryjolek J, Ludwig H, Zbikowska-Götz M, Bartuzi Z, Krogulska A. Anaphylaxis after consumption of pumpkin seeds in a 2-y-old child tolerant to its pulp: A case study. Nutrition 2021;89:111272. PubMed
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