# Bison Liver Capsules (Bison bison)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/bison-liver-capsules
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-25
**Evidence Score:** 2 / 10
**Category:** Protein
**Also Known As:** Bison bison liver, American bison liver, American buffalo liver, Plains bison liver, Desiccated bison liver, Buffalo liver supplement, Bison hepatic extract

## Overview

Bison liver capsules are a concentrated source of heme iron, vitamin B12, retinol, and coenzyme Q10 derived from Bison bison organ tissue. These bioactive compounds support red blood cell synthesis, mitochondrial [energy production](/ingredients/condition/energy), and neurological function through direct substrate provision to key metabolic pathways.

## Health Benefits

• No direct clinical evidence exists for bison liver capsules specifically - evidence quality: none
• Related bovine liver products showed potential for anemia reduction (43% to 0% in children <72 months) - evidence quality: moderate from one RCT
• [Cognitive function](/ingredients/condition/cognitive) improvements noted in children consuming liver meatballs via Wechsler tests - evidence quality: preliminary from one study
• Contains favorable omega-6:3 fatty acid ratios (<3.2) and 537 identified metabolites - evidence quality: laboratory analysis only
• High nutrient density including bioavailable iron and vitamin A based on analogous beef liver data - evidence quality: traditional/inferential

## Mechanism of Action

Heme iron in bison liver is absorbed via the HCP1 (heme carrier protein 1) transporter at roughly 15-35% efficiency, bypassing the competitive inhibition that limits non-heme iron uptake, and directly supplies substrate for hemoglobin and myoglobin synthesis. Vitamin B12 (cobalamin) acts as a cofactor for methionine synthase, converting homocysteine to methionine and supporting myelin sheath integrity and DNA methylation. Preformed retinol activates nuclear RAR/RXR receptors to regulate gene expression involved in [immune modulation](/ingredients/condition/immune-support), vision (rhodopsin synthesis), and cellular differentiation.

## Clinical Summary

No randomized controlled trials have been conducted specifically on bison liver capsules, leaving direct clinical evidence absent for this product. One moderate-quality RCT examining bovine liver supplementation in children under 72 months demonstrated a reduction in anemia prevalence from 43% to 0%, suggesting meaningful heme-iron bioavailability from mammalian liver sources that may extend to bison. [Cognitive function](/ingredients/condition/cognitive) improvements were noted in pediatric populations receiving related organ-meat interventions, likely attributable to B12 and choline sufficiency supporting myelination and neurotransmitter synthesis. Extrapolation from bovine liver data is biochemically reasonable given similar nutrient profiles, but species-specific RCTs are needed before efficacy claims can be made with high confidence.

## Nutritional Profile

Bison liver is nutritionally comparable to bovine liver given the close taxonomic relationship (both Bovinae). Per 100g fresh bison liver equivalent: Protein ~26-29g (complete protein with all essential amino acids; high bioavailability ~90-95%); Fat ~3-5g (includes arachidonic acid and omega-3 fatty acids); Carbohydrates ~3-4g (primarily glycogen). Key micronutrients: Vitamin B12 ~59-70µg (approximately 1,000-2,900% DV; highly bioavailable methylcobalamin and adenosylcobalamin forms); Retinol (preformed Vitamin A) ~16,000-20,000 IU (caution: risk of hypervitaminosis A with excessive intake); Iron ~6-8mg (~33-44% DV; predominantly heme iron with ~25-35% bioavailability, significantly higher than non-heme sources); Copper ~9-14mg (~1,000% DV; supports ceruloplasmin and iron [metabolism](/ingredients/condition/weight-management)); Folate ~260-330µg DFE (~65-83% DV); Riboflavin (B2) ~2.8-3.6mg (~215-277% DV); Niacin (B3) ~13-16mg; Zinc ~4-6mg (~36-55% DV; high bioavailability); Selenium ~30-40µg (~55-73% DV); Phosphorus ~380-420mg; Coenzyme Q10 ~40-60mg per 100g fresh equivalent (concentrated bioactive compound supporting [mitochondrial function](/ingredients/condition/energy)). Capsule form: typical serving 3,000-4,500mg desiccated liver powder; concentration factor approximately 4:1 to 5:1 (fresh to dried), meaning a 3,000mg capsule serving approximates ~12-15g fresh liver. Bioactive compounds include heme iron complexes, retinol-binding proteins, and peptide-bound trace minerals with enhanced bioavailability compared to inorganic mineral supplements. Fat-soluble vitamins (A, D, K2 as MK-4) are preserved in freeze-dried preparations. Note: Bison-specific data is extrapolated from bovine liver databases (USDA); minor compositional differences may exist based on bison diet (primarily grass-fed, which may elevate omega-3 content and CLA compared to grain-fed bovine liver).

## Dosage & Preparation

No clinically studied dosage ranges exist specifically for bison liver capsules. Analogous desiccated beef liver powder has been tested in infant foods at unspecified fortification levels. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Bison liver is extremely high in preformed retinol (vitamin A), and consuming multiple servings daily risks hypervitaminosis A, with chronic intake above 10,000 IU/day associated with hepatotoxicity, bone density loss, and teratogenicity. Pregnant women should exercise particular caution, as excess preformed retinol above 3,000 mcg RAE/day is linked to fetal developmental defects. Individuals on warfarin should monitor INR closely, as vitamin K2 content in liver may attenuate anticoagulant effect. Those with hereditary hemochromatosis or iron-overload conditions should avoid liver supplements due to the highly bioavailable heme-iron content accelerating iron accumulation.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses specifically on Bison Liver Capsules were identified. Related research includes a bovine liver extract RCT (n=50) for chronic fatigue syndrome showing no significant benefit vs. placebo (PMID: 2684076), and a study on liver meatballs reducing anemia prevalence in children (PMID: 35451359).

## Historical & Cultural Context

No evidence of bison liver in formal traditional medicine systems was identified in the research. Historical use likely stems from Indigenous North American practices valuing bison organs for nutrition, though this was not documented in the available studies. Modern supplements draw from general desiccated liver traditions for anemia and vitality support.

## Synergistic Combinations

Iron, Vitamin C, B-Complex Vitamins, Folate, Copper

## Frequently Asked Questions

### How much heme iron is in bison liver capsules?

Whole bison liver contains approximately 6-8 mg of iron per 100g serving, predominantly in heme form, which is absorbed at 15-35% efficiency compared to 2-10% for non-heme iron. A typical capsule product delivering a 3g equivalent of dried liver would provide roughly 0.2-0.25 mg of highly bioavailable heme iron per serving, meaning multiple capsules are generally required to meaningfully impact daily iron intake targets of 8-18 mg for adults.

### Are bison liver capsules better than beef liver capsules?

Bison and beef liver have very similar nutrient profiles since both are bovine family species, with bison liver containing comparable levels of B12, retinol, heme iron, and coenzyme Q10. Bison are typically grass-fed and raised without growth hormones, which may result in modestly higher omega-3 fatty acid content and lower overall fat, but no controlled comparative studies have quantified clinically meaningful differences in supplement bioavailability. The choice largely comes down to sourcing preferences and tolerability rather than documented superiority of one species.

### Can bison liver capsules help with anemia?

Indirect evidence from a moderate-quality RCT on bovine liver supplementation showed anemia prevalence dropping from 43% to 0% in children under 72 months, driven by heme iron's superior intestinal absorption via the HCP1 transporter pathway. Bison liver contains the same heme-iron compounds and is biochemically comparable, making it a plausible intervention for iron-deficiency anemia, though no bison-specific trials exist. Adults with diagnosed iron-deficiency anemia should consult a physician before replacing conventional iron therapy with liver capsules, as standardized iron supplements offer more precise, clinically validated dosing.

### What is the recommended dosage for bison liver capsules?

No clinically established dosage exists specifically for bison liver capsules, but most commercial products recommend 3-6 capsules daily, typically delivering a 3-6g whole-liver equivalent per serving. Given the high preformed retinol content—roughly 4,900-6,500 mcg RAE per 100g of raw liver—users should cap intake to avoid exceeding the tolerable upper limit of 3,000 mcg RAE/day for adults, which equates to approximately 50g or less of whole liver equivalent daily. Starting with the lowest effective dose and monitoring serum retinol and ferritin levels after 8-12 weeks is a prudent approach.

### Is it safe to take bison liver capsules every day?

Daily use at manufacturer-recommended doses is likely safe for most healthy adults when capsule intake is kept to 3-6 capsules per day, but long-term daily use at high doses poses a real risk of vitamin A toxicity due to cumulative retinol accumulation in hepatic tissue. Symptoms of chronic hypervitaminosis A include fatigue, bone pain, skin changes, and elevated liver enzymes, with toxicity documented at sustained intakes above 10,000 IU (3,000 mcg RAE) daily. Pregnant women, individuals with liver disease, and those already consuming vitamin A-rich diets should restrict daily use or avoid it entirely without medical supervision.

### Does bison liver contain vitamin A, and could it cause toxicity if taken daily?

Bison liver is extremely rich in preformed vitamin A (retinol), which can accumulate in the body over time. Daily supplementation with bison liver capsules may lead to vitamin A toxicity, a condition called hypervitaminosis A, which can cause headaches, nausea, and bone health issues. It is important to monitor total vitamin A intake from all sources, including diet and other supplements, when taking bison liver capsules regularly.

### Are bison liver capsules suitable for people with hemochromatosis or iron overload disorders?

Bison liver capsules are not recommended for individuals with hemochromatosis or other iron overload conditions, as the supplement is extremely high in bioavailable heme iron. These conditions cause the body to absorb and store excessive amounts of iron, which can damage organs over time. People with iron metabolism disorders should consult their healthcare provider before using any organ meat supplements.

### How does the nutrient density of bison liver compare to taking a multivitamin?

Bison liver capsules provide a concentrated, whole-food source of multiple nutrients—including B vitamins, copper, selenium, and choline—in ratios that reflect natural food composition, unlike standardized multivitamins. However, bison liver also delivers very high levels of vitamin A and iron, which may exceed individual needs and cannot be easily adjusted as with multivitamins. For most people seeking broad micronutrient support, a multivitamin offers more controlled dosing, while bison liver is better suited for targeting specific nutrient deficiencies.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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