Interactions on record — worth a quick check against your medications. Based on 1 of 2 ingredients. Check your meds →
Dietary supplement

Grassfed Thymus Ingredients & Drug Interactions

by Ancestral Supplements

Grassfed Thymus label
See full label image
Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Minor
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Grassfed Thymus 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: Minor

Grassfed Thymus is a dietary supplement by Ancestral Supplements with 2 active ingredients. Its ingredients are commonly taken for anemia and low iron, vitamin b12 support, general energy and fatigue.Based on those ingredients, 3 medications have a known interaction with it, the most serious rated minor. The ingredients most likely to interact are Liver. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Grassfed Thymus by Ancestral Supplements

Ask about any prescription or over-the-counter medication and we check it for interactions with Grassfed Thymus by Ancestral Supplements — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Grassfed Thymus by Ancestral Supplements

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 2 of its 2 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains 2 active ingredients: liver extract and thymus. Liver extract is a concentrated form of beef liver, traditionally used to support energy and nutrient density.

Thymus extract comes from the thymus gland, an organ involved in immune function. The capsules also contain gelatin as an inactive ingredient.

Does it work?

Couldn't assess
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 assessable

This is a single-ingredient Liver Extract product and its label doesn't state a use — see Liver Extract's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence we hold rates liver extract as possibly ineffective for chronic fatigue syndrome. For hepatitis C, the data is too limited to rate it either way — we simply don't have enough reliable evidence.

Thymus extract's effectiveness isn't established in our data.

The evidence, ingredient by ingredient Liver 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 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Liver extract is generally low-risk for healthy adults eating it in food amounts, but this product delivers concentrated doses — potentially high levels of vitamin A and iron. Liver products may contain very high vitamin A, which could harm a developing baby, so pregnancy use should only happen under your doctor's guidance.

There's also concern about source quality: liver extract comes from raw animal liver collected at slaughterhouses, and in countries where bovine spongiform encephalitis (BSE) has been found, there's a theoretical risk of contaminated tissue. No cases of BSE transfer from liver extract to humans have been reported, but safety testing overall hasn't been thorough.

Side effects, ingredient by ingredient Liver Extract

Meds to double-check

Minor interactions only
Known Interaction Concern · database check
Minor only

Only Minor-severity interactions are documented for these ingredients.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Liver Extract.
  • The most serious interaction on file is rated Minor.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 3 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.

Check with us before using this product if you take warfarin (Coumadin) — it may reduce the drug's blood-thinning effect — or if you take iron supplements or iron-containing medications.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Only minor medication interactions are documented, and safety information is well characterized.

This is a traditional whole-food supplement if you're looking to add concentrated liver and thymus nutrients to your diet. If you take warfarin or iron supplements, check with us first — there's a potential interaction.

Pregnant people should talk to their doctor before using it. If you have questions about the source or quality of the liver, ask your pharmacist.

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

Assessment coverage: 1 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Dec 21, 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 Grassfed Thymus, straight from the product label.

Brand Ancestral Supplements
Barcode (UPC) 675757264304
Net contents 180 Capsule(s)
Market status On market
Date entered into DSLD Dec 21, 2024
DSLD ID 309434
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
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 Grassfed Thymus by Ancestral Supplements, 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:
6 Capsule(s)
Maximum serving Sizes:
6 Capsule(s)
Servings per container
30
UPC/BARCODE
675757264304
IngredientAmount% DV
Liver1500 mg--
Thymus1500 mg--

Other ingredients: Gelatin

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.
General Statements

For most of human history, we consumed the whole animal (nose-to-tail) with deep respect and profound purpose. For instance, Native Americans and early ancestral healers believed that eating the organs from a healthy animal would strengthen and support the health of the corresponding organ of the individual - also known as "like supports like." The traditional way of treating a person with a weak heart was to feed the person the heart of a healthy animal. Since we've abandoned these ways, the modern world has left us malnourished with an epidemic of declining health. The solution is to find ways to recreate our ancestral environment (sleep, nourishment, movement, sunshine, etc). It's time we honor our ancestors by putting back in, what the modern world has left out (to return our people back to strength, health and happiness). We walk our talk and we offer a one-of-a-kind "guided" experience. Learn more at www.ancestralsupplements.com Brian Johnson "Liver King"

180 Capsules 500mg EA

One small batch at a time

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.

Formula

Thymus 1500mg with liver 1500mg

Formulation

Pasture raised in New Zealand & Australia Grass-fed & grass-finished

Hormone, pesticide & GMO free Absolutely no fillers (or) flow agents

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Suggested Use: 6 capsules daily or as directed by a healthcare professional

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

See for yourself

Grassfed Thymus by Ancestral Supplements label

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

Grassfed Thymus 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 Grassfed Thymus by Ancestral Supplements

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size6 Capsule(s) Dosage formCapsule Servings per container30 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.

Liver

Interacts with
3 drugs
1500 mg per serving Form: Bovine

Liver extract is a dried or concentrated form of animal liver that is naturally rich in iron, vitamin B12, vitamin A, and other nutrients. It was once...

Liver monograph & interactions

Thymus

1500 mg per serving Form: Ovine

Other (inactive) ingredients: Gelatin. These complete the product’s ingredient list but are not active constituents.

Interaction report

Grassfed Thymus by Ancestral Supplements Drug Interactions

Want to check YOUR meds against Grassfed Thymus?

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
3Drugs
3 Minor

Ingredients driving the most interactions

Liver 3

Individual Drug Interactions

The ingredients in Grassfed Thymus interact with 3 drugs. Click any drug to see the details.

1 of the 2 ingredients in Grassfed Thymus interact with drugs. Each result below shows which ingredient is responsible. Liver

Each ingredient & the kinds of drugs it affects

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

Liver2 drug types · 3 drugs

Iron

Liver extract can contain heme iron. Taking liver extract with iron-containing medications or supplements may increase total iron intake and could increase the risk of gastrointestinal adverse effects or excessive iron accumulation. The risk is greater with high doses, prolonged use, or in individuals with hemochromatosis or another iron-overload disorder. Review the iron content of the liver extract and the total elemental iron dose. Avoid unnecessary duplicate iron supplementation and consider monitoring ferritin and transferrin saturation when clinically appropriate.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Liver extract products may contain small and variable amounts of vitamin K. Theoretically, starting, stopping, or substantially changing the amount of liver extract used could reduce the anticoagulant effect of warfarin and lower the INR. However, this interaction has not been directly studied or reported in humans, and the vitamin K content of liver extract products is generally not standardized. Consider monitoring the INR after a meaningful change in liver extract use.

Likelihood Possible Evidence C
Liver full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Grassfed Thymus, from the product label.

Ancestral Supplements

See all Ancestral Supplements products
Name
Ancestral Supplements, LLC
City
Willis
State
TX
ZipCode
77318
Web Address
www.ancestralsupplements.com
Pharmacist Counseling Corner

Grassfed Thymus by Ancestral Supplements: Common Questions

Does Grassfed Thymus by Ancestral Supplements interact with any medications?
Yes. Based on its ingredients, Grassfed Thymus has a known interaction with 3 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Grassfed Thymus contains 2 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?
Liver extract can contain very high vitamin A, which may harm a developing baby. Don't use it in pregnancy unless your doctor advises it. If you're thinking about it, talk with your doctor or pharmacist first.
Is this product safe if I take other supplements?
The main concern is combining it with iron supplements — that could raise your total iron intake and cause stomach upset or iron buildup over time. We couldn't check the thymus ingredient, so if you're taking other supplements or medications, run them through our checker on this page.
What's inside — is it just liver and thymus?
The two active ingredients are liver extract and thymus. The capsules also contain gelatin. That's it — no other active ingredients, just those two plus the capsule itself.
How much vitamin A and iron does one dose give me?
The facts we have don't break down the exact amounts of vitamin A and iron per capsule, only that the product delivers high levels of both. If you're concerned about your total intake — especially if you take iron supplements or have an iron-storage condition — ask your pharmacist to check the label.
Does this actually work for fatigue?
The evidence we hold rates it as possibly ineffective for chronic fatigue syndrome, meaning it hasn't shown reliable benefit in studies. We don't have enough evidence to say one way or the other for other uses.

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

Not sure if Grassfed Thymus 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.

Grassfed Thymus label
Go deeper

The Full Monographs Behind Grassfed Thymus’s Ingredients

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

Herb & supplement monograph

Liver Extract

Interacts with 3 drugs

Liver extract is a dried or concentrated form of animal liver that is naturally rich in iron, vitamin B12, vitamin A, and other nutrients. It was once used to treat certain anemias before pu...

Read the full Liver Extract monograph →
Sources

Sources & How We Checked

Grassfed Thymus'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 4 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.

Liver Extract 4 references
  1. Lewis CJ. Letter to reiterate certain public health and safety concerns to firms manufacturing or importing dietary supplements that contain specific bovine tissues. FDA. Available at: www.cfsan.fda.gov/~dms/dspltr05.html.
  2. Kaslow JE, Rucker L, Onishi R. Liver extract-folic acid-cyanocobalamin vs placebo for chronic fatigue syndrome. Arch Intern Med 1989;149:2501-3. DOI
  3. Ebinuma, H., Saito, H., Tada, S., Masuda, T., Kamiya, T., Nishida, J., Yoshioka, M., and Ishii, H. Additive therapeutic effects of the liver extract preparation mixture adelavin-9 on interferon-beta treatment for chronic hepatitis C. Hepatogastroenterolog
  4. Saito, H., Ebinuma, H., Tada, S., Tsunematsu, S., Atsukawa, K., Masuda, T., Tsuchiya, M., and Ishii, H. Enhancing effect of the liver extract and flavin adenin dinucleotide mixture on anti-viral efficacy of interferon in patients with chronic hepatitis C. PubMed

See these in context on the Liver 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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