Liver
Overview
Liver is a highly nutrient-dense organ meat providing exceptionally high amounts of vitamin B12, folate, retinol (vitamin A), heme iron, and choline. These nutrients support one‑carbon metabolism, red blood cell formation, and neurotransmitter-related pathways, making liver a potent “micronutrient booster” when used occasionally rather than daily [1].
Within the BRAIN Diet framework, liver is typically treated as a periodic offal food that can help close nutrient gaps (especially B12, folate, and retinol) while keeping the overall diet plant-forward. Because liver is also a concentrated source of preformed vitamin A, portion size and frequency matter; gentle cooking and thoughtful sourcing help balance nutrient density with practical tolerability [1,2].
Key Nutritional Highlights
- Highest iron among BRAIN Diet meat and organ pages (per 100 g).
- Nutrient-dense source of complete protein plus highly bioavailable vitamins and minerals.
- Typically richer than standard muscle meat in vitamin B12 and other micronutrients.
- Contains no dietary fibre, so meals are usually more balanced with vegetables, legumes, or whole grains.
- Nutrient concentrations can be very high, so portion size and frequency are useful practical levers.
- Processing and cooking method still matter for overall dietary context.
Food Context
Sourcing
- Source from grass-fed/pasture-raised animals when possible for optimal nutrient profile
Preparation
- Moderate consumption due to high vitamin A content (retinol can accumulate)
- Gentle cooking preserves nutrients and prevents formation of advanced glycation end products (AGEs)
- Important for vegan/vegetarian nutrient gap closure, though not suitable for vegetarians
- Organ meats (heart, liver), oily fish (sardines, mackerel), beef are top sources for CoQ10
Essential Amino Acid Profile
This food provides a complete essential amino acid profile typical of animal proteins.
Recipes
Nutrient Tables (per 100 g)
Core nutrients
| Nutrient | Amount per 100 g | % RDA per 100 g |
|---|---|---|
| Energy | 133 kcal | — |
| Protein | 16.4 g | — |
| Total fat | 4.3 g | — |
| Saturated fat | 1.6 g | — |
| Carbohydrates | 6.3 g | — |
| Fibre | 0 g | — |
Key micronutrients
| Nutrient | Amount per 100 g | % RDA per 100 g |
|---|---|---|
| Iron | 30.5 mg | 169.6% |
| Zinc | 3.1 mg | 27.9% |
| Magnesium | 24 mg | 5.7% |
| Selenium | 68.1 µg | 123.8% |
| Calcium | 43 mg | 4.3% |
| Potassium | 230 mg | 6.8% |
| Folate | 738 µg | 184.5% |
| Vitamin B12 | 54 µg | 2250% |
| Vitamin B6 | 0.8 mg | 44.7% |
Bioactive compounds
Values below are often from specialist compositional databases or literature, not the standard USDA panel. Asterisks (*) refer to source notes at the bottom of this section.
| Compound / class | Amount per 100 g | Notes |
|---|---|---|
| ALA | 951 mg | — |
Note: Bioactive-compound values vary substantially by cultivar, species, cocoa or oil percentage, processing, and brand formulation. Show quantitative values only where a defensible source exists; otherwise prefer qualitative presence statements or ranges in source notes.
Substances
Substances in this food: editorial (Overview / literature) plus analytical (nutrition table).
14 substances in this food
Choline
Acetylcholine precursor; methyl donor; phospholipid synthesis for membranes
Coenzyme Q10 (CoQ10)
Electron transport chain cofactor and antioxidant relevant to mitochondrial function
Creatine
Phosphocreatine system buffer for neuronal ATP demand; cognitive support evidence
Iron
Oxygen transport; dopamine synthesis (tyrosine hydroxylase cofactor)
Vitamin A (Retinoids; β-Carotene precursor)
Neurodevelopment; immune regulation; antioxidant via carotenoids
Vitamin B12 (Cobalamin)
Methylation; myelin; mitochondrial odd-chain FA metabolism
Vitamin B9 (Folate; 5-MTHF)
One-carbon metabolism; methylation; homocysteine recycling
Zinc
Cofactor in neurotransmission and antioxidant enzymes; dopamine modulation
Magnesium
Enzymatic cofactor (>300 reactions); neurotransmitters; mitochondria; redox balance
Selenium
Antioxidant enzyme cofactor (GPx); supports redox balance
Calcium
Bone health; neurotransmission; interacts with vitamin D and K2
Potassium
Electrolyte for nerve transmission, muscle function, and blood pressure regulation
Vitamin B6 (Pyridoxine → PLP)
PLP cofactor for neurotransmitter synthesis; relies on brain PDXK activation
ALA (Alpha-Linolenic Acid)
Essential omega-3 precursor; limited conversion to DHA/EPA
References
These references link to the BRAIN Diet bibliography page, where the full citation and DOI/external source link are provided.