Buckwheat

Overview

Buckwheat is a gluten-free pseudograin that provides complex carbohydrates, fibre, and useful plant protein, together with minerals such as magnesium, iron, zinc, and selenium [2]. Compared with many refined grain products, it can improve micronutrient density and fibre intake while broadening whole-grain diversity.

As with other grain-type plant proteins, buckwheat is better framed as lysine-limited but complementary, rather than "complete" in isolation [1,2]. In the BRAIN Diet framework, combining buckwheat with legumes across meals is a practical way to improve essential amino-acid balance while maintaining a fibre- and mineral-rich dietary pattern [1,2].

Key Nutritional Highlights

• Naturally gluten-free pseudograin; lysine-limited plant protein pairs with legumes [1,2].
• Rich in flavonoids (e.g. rutin) within antioxidant dietary patterns.
• Fibre (~10 g per 100 g flour) supports fermentable-fibre intake [2].
• Higher methionine than legumes; combine with lentils/chickpeas for amino-acid balance [1,2].

Food Context

Synergies

• Pair buckwheat with legumes (e.g. lentils, chickpeas, beans) to improve overall essential amino-acid balance at meal/day level [1,2].

Preparation

• Rinse before cooking to remove any debris
• Use gentle simmering and avoid overcooking to preserve texture and practical meal quality.

Essential Amino Acid Profile

Buckwheat provides a useful plant protein source but is not a complete protein.

Notable amino acids:

• Methionine (relatively higher than in legumes)

Limiting amino acids:

• Lysine (typical of grains)

Protein pairing strategy:

Grains such as buckwheat are relatively higher in methionine but lysine-limited. Combining with legumes (e.g. lentils, chickpeas) creates a more balanced essential amino acid profile.

Recipes

1 recipe containing this food

Savoury Greens & Egg Breakfast Skillet

A warm savoury breakfast skillet with eggs, greens, and slow carbohydrates for steady morning energy.

Nutrient Tables (per 100 g)

Core nutrients

Nutrient	Amount per 100 g	% RDA per 100 g
Energy	343 kcal	—
Protein	13.3 g	—
Total fat	3.4 g	—
Saturated fat	0.7 g	—
Carbohydrates	71.5 g	—
Fibre	10 g	—

Key vitamins and minerals

Nutrient	Amount per 100 g	% RDA per 100 g
Magnesium	231 mg	55%

Reference intakes: US Dietary Reference Intakes for adults (19–50 years; using the higher of male/female values where they differ).

Data provenance (core / micronutrient panel): USDA FoodData Central, Buckwheat, FDC ID 170286, SR Legacy bulk (April 2018), per 100 g edible portion, last checked 2026-08-15

Substances

Substances admitted through a supported nutrition-table row. Not every table row appears here. Cards are not BRS mappings.

1 substance in this food

Mg²⁺

Magnesium

Enzymatic cofactor (>300 reactions); neurotransmitters; mitochondria; redox balance

References

[1] Report recommending the Digestible Indispensable Amino Acid Score (DIAAS) as the preferred method for evaluating dietary protein quality, replacing PDCAAS, and detailing methodology and implications for human nutrition. FAO 2013. Dietary Protein Quality Evaluation in Human Nutrition: Report of an FAO Expert Consultation

[2] Fibre (~10 g per 100 g flour) supports fermentable-fibre intake. Mariotti & Gardner 2019. Dietary Protein and Amino Acids in Vegetarian Diets—A Review