Grass Fed Beef Liver 500 mg Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Grass Fed Beef Liver 500 mg 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
Grass Fed Beef Liver 500 mg is a dietary supplement by Optimal Carnivore 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 New Zealand Bovine Liver. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Grass Fed Beef Liver 500 mg by Optimal Carnivore
Ask about any prescription or over-the-counter medication and we check it for interactions with Grass Fed Beef Liver 500 mg by Optimal Carnivore — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of Grass Fed Beef Liver 500 mg by Optimal Carnivore
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
Full disclosure
This product contains one active ingredient: New Zealand Bovine Liver at 500 mg per capsule. Beef liver is nutrient-dense and delivers a range of vitamins and minerals naturally present in the tissue.
The capsule itself is made from gelatin, an inactive ingredient.
Does it work?
Couldn't assess
The evidence for beef liver extract in chronic fatigue syndrome (CFS) rates as possibly ineffective — meaning studies do not support its use for that condition. For hepatitis C, there isn't enough reliable evidence to rate whether it works.
We don't hold data on effectiveness for other uses.
How safe is it?
Well-documented data
Beef liver products are generally low risk for healthy adults eating food amounts, but this supplement can deliver high levels of vitamin A and iron — both of which can cause problems at high doses. There's also a source-quality concern: liver extract comes from raw animal livers collected at slaughterhouses, and there's theoretical risk of contamination from sick animals or, in countries where BSE (mad cow disease) has been reported, from diseased tissue.
No cases of BSE transfer to humans from liver extract have been reported, but the safety data is limited. Because of the high vitamin A content, pregnant women should avoid this product unless a doctor advises otherwise.
A thorough safety evaluation hasn't been done, so check with your doctor before using.
Meds to double-check
Minor interactions only
Check before taking if you use warfarin (Coumadin) — a blood thinner — or iron supplements or iron-containing medications. Both interactions are minor but worth confirming with your exact drugs using the tool below.
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 single-ingredient beef liver supplement, primarily of interest to people following a carnivore diet or seeking whole-food nutrition. If you take warfarin, iron supplements, or have an iron-overload condition, check your exact medications first.
Pregnant women and anyone with liver disease or BSE concerns should talk to their doctor before starting.
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, 2025.
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 Grass Fed Beef Liver 500 mg, straight from the product label.
| Brand | Optimal Carnivore |
|---|---|
| Barcode (UPC) | X002INKUVH |
| Net contents | 180 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Feb 23, 2025 |
| DSLD ID | 323269 |
| Product type | Non-nutrient/non-botanical |
| 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 Grass Fed Beef Liver 500 mg by Optimal Carnivore, sourced from the NIH Dietary Supplement Label Database.
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.
Formulation
Helping you thrive with the most nutrient dense foods on the planet We believe that everyone deserves access to the most nutrient-dense food on the planet in a convenient, easy to take form. We only source from 100% grass-fed animals in New Zealand-one of the cleanest purest environments on earth. The cattle are reared as nature intended, without the use of growth-promoting hormones, free to roam grass pastures. We gently freeze-dry the organs to preserve all the vitamins, minerals, proteins and enzymes.
Nothing but nutrients Hormone-free & Non-GMO. 100% additive-free. No stearates, lubricants, binders, fillers or flow agents.
New Zealand
Formula
Six capsules provide the equivalent of one ounce of fresh, raw whole organs.
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
FDA Statement of Identity
Dietary Supplement
Suggested/Recommended/Usage/Directions
Suggested use: 6 capsules daily or as directed by a healthcare professional
Seals/Symbols
GMP Quality Good Manufacturing Practice Certification Made in USA
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Grass Fed Beef Liver 500 mg by Optimal Carnivore 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 Grass Fed Beef Liver 500 mg by Optimal Carnivore
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.
New Zealand Bovine Liver
Interacts with3 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...
New Zealand Bovine Liver monograph & interactionsOther (inactive) ingredients: Gelatin. These complete the product’s ingredient list but are not active constituents.
Grass Fed Beef Liver 500 mg by Optimal Carnivore Drug Interactions
HelloPharmacist Interaction Report
Grass Fed Beef Liver 500 mg by Optimal Carnivore does interact with a small number of medications, though the documented risks are minor.
The ingredient New Zealand Bovine Liver can contain variable amounts of vitamin K, which theoretically could reduce how well warfarin (Coumadin) — a blood thinner — works if you start, stop, or substantially change your dose of this supplement. The interaction hasn't been directly studied in humans, so the real-world risk is uncertain.
Read the full breakdown — every affected drug type, severity by severity
Additionally, liver extract contains heme iron — a form of iron your body absorbs well. If you're also taking iron supplements or iron-containing medications, combining them could raise your total iron intake and increase stomach upset or iron buildup, especially at higher doses or with long-term use.
This risk is higher if you have hemochromatosis (an iron-storage condition) or another iron-overload disorder.
Altogether, these interactions span 3 individual medications. If you take warfarin, iron supplements, or iron-containing drugs, use the medication checker below with your exact prescriptions before starting this product.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Grass Fed Beef Liver 500 mg?
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 Grass Fed Beef Liver 500 mg interact with 3 drugs. Click any drug to see the details.
1 of the 1 ingredient in Grass Fed Beef Liver 500 mg interact with drugs. Each result below shows which ingredient is responsible. New Zealand Bovine Liver
Ferrous SulfateFeosol
How Ferrous Sulfate interacts with Grass Fed Beef Liver 500 mg — through 1 ingredient. Tap an ingredient for the detail:
New Zealand Bovine LiverIron Minor
Interaction Summary
Liver extract can contain heme iron.
Read the full New Zealand Bovine Liver + Ferrous Sulfate interactionWarfarinWarfarin
How Warfarin interacts with Grass Fed Beef Liver 500 mg — through 1 ingredient. Tap an ingredient for the detail:
New Zealand Bovine LiverWarfarin (coumadin) Minor
Interaction Summary
Liver extract products may contain small and variable amounts of vitamin K.
Read the full New Zealand Bovine Liver + Warfarin interactionWarfarin SodiumCoumadin, Panwarfin, Sofarin
How Warfarin Sodium interacts with Grass Fed Beef Liver 500 mg — through 1 ingredient. Tap an ingredient for the detail:
New Zealand Bovine LiverWarfarin (coumadin) Minor
Interaction Summary
Liver extract products may contain small and variable amounts of vitamin K.
Read the full New Zealand Bovine Liver + Warfarin Sodium interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Grass Fed Beef Liver 500 mg 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.
New Zealand Bovine Liver
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.
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.
Brand information
Manufacturer and brand details for Grass Fed Beef Liver 500 mg, from the product label.
Optimal Carnivore
See all Optimal Carnivore products- Name
- Optimal Carnivore, LLC
- Street Address
- 13359 N Hwy 183, Ste 406.
- City
- Austin
- State
- TX
- ZipCode
- 78750
- Web Address
- www.optimalcarnivore.com
Grass Fed Beef Liver 500 mg by Optimal Carnivore: Common Questions
Does Grass Fed Beef Liver 500 mg by Optimal Carnivore interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Is this safe during pregnancy?
Can this help with chronic fatigue?
What's the concern about BSE (mad cow disease)?
Will this raise my iron levels too high?
What's in one capsule besides the liver?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Grass Fed Beef Liver 500 mg is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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.
The Full Monographs Behind Grass Fed Beef Liver 500 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Grass Fed Beef Liver 500 mg'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 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
- 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.
- 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
- 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
- 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
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