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Dietary supplement

Grass Fed Liver Ingredients & Drug Interactions

by Peak Performance

Grass Fed Liver 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 Grass Fed Liver 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

Grass Fed Liver is a dietary supplement by Peak Performance with 1 active ingredient. 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 Bovine 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 Grass Fed Liver by Peak Performance

Ask about any prescription or over-the-counter medication and we check it for interactions with Grass Fed Liver by Peak Performance — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Grass Fed Liver by Peak Performance

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 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

Peak Performance Grass Fed Liver is a single-ingredient supplement containing bovine liver, which is derived from beef liver tissue. The capsules also contain gelatin and water as inactive ingredients.

Bovine liver is nutrient-dense and has been used traditionally to support energy and general wellness. The ingredient naturally contains vitamins, minerals, and proteins found in animal liver.

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 for bovine liver in chronic fatigue syndrome is rated possibly ineffective in our data. For hepatitis C, there isn't enough reliable evidence to rate whether it works.

If you're considering this product for either condition, the science doesn't currently support a strong benefit.

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 well tolerated in food-like amounts for healthy adults, but the facts note a few cautions. Liver products can deliver very high levels of vitamin A, which may harm a developing baby, so the safety data advises against use during pregnancy unless your doctor recommends it.

Safety in lactation hasn't been well studied either. There's also concern about source quality: liver extract comes from raw animal tissue processed at slaughterhouses, which could theoretically come from sick animals.

Additionally, there's a theoretical risk of contamination with bovine spongiform encephalitis (BSE) if the liver source is from countries where BSE has been documented. No human cases from contaminated liver extract have been reported to date, but the facts advise checking the country of origin if this is a concern for you.

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 your pharmacist if you take warfarin (Coumadin) or any iron supplements or iron-containing medications before using this product. The minor interactions with both aren't likely to be serious, but they're worth discussing given warfarin's narrow safety margin.

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.

Grass Fed Liver may appeal to people seeking a whole-food, nutrient-dense supplement. If you take warfarin or iron supplements, talk to your pharmacist before starting—the minor interactions are worth reviewing.

Pregnant people should avoid it unless their doctor approves. Check the product label for where the liver was sourced.

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

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Feb 23, 2022.

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 Grass Fed Liver, straight from the product label.

Brand Peak Performance
Barcode (UPC) X001WRO60V
Net contents 180 Capsule(s)
Market status On market
Date entered into DSLD Feb 23, 2022
DSLD ID 261689
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Grass Fed Liver by Peak Performance, 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
X001WRO60V
IngredientAmount% DV
Bovine Liver3 Gram(s)--

Other ingredients: Gelatin, Water

Tap any ingredient to jump to its full detail below.

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

Suggested usage: For best results take 6 capsules or as recommended by your healthcare practitioner.

Formulation

Peak Performance Liver is a superfood sourced from beef that is desiccated to preserve heat sensitive nutrients.

This supplement is free of gluten, GMOs, additives, preservatives, artificial colors, pesticides, soy, and dairy.

Not manufactured with wheat, gluten, milk, egg, fish, shellfish or tree nut ingredients.

Made with Non GMO Ingredients

FDA Statement of Identity

Dietary Supplement

General Statements

Save 20% BuyPeakPerformance.com

Storage

Store in a cool, dry place after opening.

Precautions

Caution: For adults only.

Consult a physician if you are pregnant/nursing, taking medication or have a medical condition.

Keep out of reach of children.

Seals/Symbols

GMP Good Manufacturing Practice Consistent Quality Formulated in the USA

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

See for yourself

Grass Fed Liver by Peak Performance label

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

Grass Fed Liver 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 Grass Fed Liver by Peak Performance

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size6 Capsule(s) Dosage formCapsule Servings per container30 Amounts shown are per serving.

Bovine Liver

Interacts with
3 drugs
3 Gram(s) per serving

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...

Bovine Liver monograph & interactions

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

Interaction report

Grass Fed Liver by Peak Performance Drug Interactions

Want to check YOUR meds against Grass Fed Liver?

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

Bovine Liver 3

Individual Drug Interactions

The ingredients in Grass Fed Liver interact with 3 drugs. Click any drug to see the details.

1 of the 1 ingredient in Grass Fed Liver interact with drugs. Each result below shows which ingredient is responsible. Bovine Liver

Each ingredient & the kinds of drugs it affects

For each ingredient in Grass Fed Liver 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.

Bovine 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
Bovine Liver full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Grass Fed Liver, from the product label.

Peak Performance

See all Peak Performance products
Name
Peak Performance Life LLC
City
Henderson
State
NV
ZipCode
89052
Phone Number
+1 (866) 202-0194
Web Address
www.BuyPeakPerformance.com
Pharmacist Counseling Corner

Grass Fed Liver by Peak Performance: Common Questions

Does Grass Fed Liver by Peak Performance interact with any medications?
Yes. Based on its ingredients, Grass Fed Liver 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?
Grass Fed Liver contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism 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?
The safety data advises against it during pregnancy because liver extract can contain very high vitamin A, which may harm a developing baby—talk with your doctor first. Safety during breastfeeding hasn't been well studied, so ask your doctor or pharmacist for personalized advice.
Will this help my chronic fatigue?
The evidence for bovine liver in chronic fatigue syndrome is rated possibly ineffective in our data, so the science doesn't currently support a benefit for that condition.
What should I know about source and safety?
Liver extract comes from raw animal tissue, which carries a theoretical contamination risk. The facts note concern about potential contamination with bovine spongiform encephalitis (BSE) if sourced from countries where BSE has been reported—though no human cases from liver extract have been documented. Check the label for the country of origin.
Could this cause high iron levels in my body?
Liver naturally contains heme iron. If you're taking iron supplements or medications, combining them could increase your total iron intake, especially at high doses or with long-term use. The risk is higher if you have a condition that causes iron overload. Talk to your pharmacist about whether you should take them together.
Are there any reported side effects?
No adverse reactions have been formally reported. However, a thorough safety evaluation hasn't been completed, so talk with your doctor before starting if you have concerns.

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.

Grass Fed Liver label
Go deeper

The Full Monographs Behind Grass Fed Liver’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

Grass Fed Liver'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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