Lentils
Overview
Lentils are a staple legume providing plant protein, slowly digested carbohydrates, and substantial amounts of fibre, iron, zinc, magnesium, and folate. As a dry seed, they are nutrient-dense and shelf-stable, and when cooked they contribute both energy and micronutrients that support one‑carbon metabolism, red blood cell formation, and neurometabolic processes [1]. Their fibre and prebiotic galacto‑oligosaccharides (GOS) also support gut microbial diversity and short‑chain fatty acid production, which indirectly influences metabolic and brain health [2].
Within the BRAIN Diet framework, lentils are treated as a core plant protein and fibre source that pairs well with grains to round out amino acid profiles. They are particularly useful in patterns that limit or exclude animal products, helping to cover non‑heme iron and zinc requirements when prepared and combined appropriately [1]. Soaking, sprouting, and pairing with vitamin C–rich foods improves mineral bioavailability from lentil-based meals [1,2].
Food Context
Synergies
- Pair with grains for complete amino acid profile; grain-legume complementarity improves essential amino-acid coverage
- Pair with vitamin C sources to enhance iron absorption, with studies showing up to a fourfold increase when consumed together Hallberg et al. 1989
Preparation
- Soak and cook thoroughly to reduce phytates and improve mineral bioavailability; soaking and sprouting reduces phytates in legumes/grains, improving non-heme iron and zinc bioavailability
- Source of prebiotic fiber (GOS - galactooligosaccharides) supporting gut microbiome health
Essential Amino Acid Profile
Lentils provide a strong plant protein source but are not a complete protein.
Notable amino acids:
- Lysine
Limiting amino acids:
- Methionine and cysteine (DIAAS ~65–70)
Protein pairing strategy:
Lentils are rich in lysine but relatively low in sulfur-containing amino acids. Combining lentils with grains such as rice, oats, barley, or other grains helps create a more balanced essential amino acid profile.
Recipes
2 recipes containing this food
Rocket Lentil Avocado Midday Salad (Gut-Supporting)
Polyphenol-rich midday salad with quinoa or lentils, vegetables, avocado, and early harvest olive oil
Turmeric Lentil Dahl
Turmeric- and ginger-spiced lentil dish rich in fibre, folate, and polyphenols
Nutrient Tables (per 100 g)
Core nutrients
| Nutrient | Amount per 100 g | % RDA per 100 g |
|---|---|---|
| Energy | 350.9 kcal | — |
| Protein | 23.6 g | — |
| Total fat | 1.9 g | — |
| Carbohydrates | 62.2 g | — |
Key micronutrients
| Nutrient | Amount per 100 g | % RDA per 100 g |
|---|---|---|
| Iron | 7.2 mg | 39.8% |
| Zinc | 3.9 mg | 35.1% |
| Magnesium | 106.7 mg | 25.4% |
| Calcium | 61.9 mg | 6.2% |
| Potassium | 948.9 mg | 27.9% |
Substances
Substances in this food: editorial (Overview / literature) plus analytical (nutrition table).
5 substances in this food
Iron
Oxygen transport; dopamine synthesis (tyrosine hydroxylase cofactor)
Magnesium
Enzymatic cofactor (>300 reactions); neurotransmitters; mitochondria; redox balance
Potassium
Electrolyte for nerve transmission, muscle function, and blood pressure regulation
Zinc
Cofactor in neurotransmission and antioxidant enzymes; dopamine modulation
Calcium
Bone health; neurotransmission; interacts with vitamin D and K2
References
These references link to the BRAIN Diet bibliography page, where the full citation and DOI/external source link are provided.