Rice

Overview

Rice is a globally used staple carbohydrate. Within the BRAIN Diet, variant and processing often matter more than the word “rice” on a label: degree of milling, pigmentation (white, red, black), cultivar (e.g. basmati vs jasmine), cooking and cooling, fermentation, and meal context (protein, fat, fibre, acidity) shape fibre, resistant starch (RS), glycaemic impact, and polyphenol exposure.

Cooking and cooling can create larger biological differences than minor distinctions between many white-rice cultivars. Red and black rice contribute more meaningfully to antioxidant and polyphenol exposure than small cultivar differences among polished whites.

Grain protein remains lysine-limited; pairing with legumes improves essential amino acid balance [1,2]. Nutrient tables below map to brown rice, cooked as the reference variant; see the comparison table for how other types differ.

Rice Variants and Biologically Relevant Characteristics

Rice Type	Fibre	Resistant Starch Potential	Glycaemic Impact	Polyphenols	Micronutrient Density	Notes
White Rice	Low	Low (freshly cooked)	Higher	Low	Lower	Most bran removed; primarily starch source.
White Rice (Cooked & Cooled)	Low	High	Lower	Low	Lower	Resistant starch formation significantly increased after cooling.
Basmati Rice	Low–Moderate	Low–Moderate	Lower than many white rice varieties	Low	Lower	Generally slower glucose appearance than jasmine rice.
Jasmine Rice	Low	Low	Higher	Low	Lower	Typically more rapidly digestible than basmati.
Brown Rice	Moderate	Moderate	Lower	Moderate	Higher	Bran retained; provides magnesium, manganese and fibre.
Red Rice	Moderate	Moderate	Lower	High	Higher	Anthocyanins and polyphenols contribute antioxidant capacity.
Black Rice	Moderate	Moderate	Lower	Very High	Higher	Rich source of anthocyanins and antioxidant compounds.
Wild Rice*	Higher	Moderate	Lower	Moderate	Higher	Technically a grass seed rather than true rice.
Fermented Rice Preparations	Variable	Variable	Lower	Variable	Variable	Fermentation may alter digestibility and microbiome interactions.

*Not botanically a true rice but often grouped with rice products.

Key Biological Variables

• Degree of milling (white vs brown)
• Pigmentation (white, red, black)
• Cooking and cooling status
• Fermentation status
• Food matrix (whole grain vs flour)
• Meal context (protein, fat, fibre, acidity)

Food Context

Synergies

• Pair with legumes for complete amino acid profile; pair legumes with grains (e.g., beans + rice) to cover lysine and methionine gaps

Preparation

• Cook and cool to increase resistant starch; reheating does not fully reverse RS formed on cooling — cooled (and reheated) white rice showed higher RS and lower glycaemic response than freshly cooked equivalents [3]
• Choose brown, red, or black rice when fibre, minerals, and polyphenols are priorities; choose basmati over jasmine when slower glucose appearance is preferred
• Fermented rice preparations (where used) may differ from standard cooked rice in digestibility and microbiome interactions — treat separately from plain polished white rice
• Cooled rice RS supports fermentable substrate for gut microbes (Bifidobacterium, Akkermansia) and butyrate-associated barrier support

Essential Amino Acid Profile

Rice provides a useful plant protein source but are 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 rice 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

Black Bean & Sweet Potato Vegetable Chilli

A fibre-rich bean and vegetable chilli with warming spices and slow carbohydrates for steady energy and satiety.

Nutrient Tables (per 100 g)

Maps to: Brown rice, cooked, no added fat (reference variant for this table)

Core nutrients

Nutrient	Amount per 100 g	% RDA per 100 g
Energy	123 kcal	—
Protein	2.4 g	—
Total fat	1.1 g	—
Saturated fat	0 g	—
Carbohydrates	25.8 g	—
Fibre	1 g	—

Key micronutrients

Nutrient	Amount per 100 g	% RDA per 100 g
Iron	0.4 mg	2.2%
Zinc	0.6 mg	5.7%
Magnesium	39 mg	9.3%
Selenium	5 µg	9.1%
Calcium	5 mg	0.5%
Potassium	80 mg	2.4%
Choline	7.2 mg	1.3%
Folate	5 µg	1.3%
Vitamin B12	0 µg	0%
Vitamin B6	0.1 mg	3.1%

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, Rice, brown, cooked, no added fat, FDC ID 2708414, API, per 100 g edible portion, last checked 2026-06-01

Substances

Substances in this food: editorial (Overview / literature) plus analytical (nutrition table).

10 substances in this food

Vitamin B1 (Thiamine)

Mitochondrial glucose metabolism; ATP synthesis; rapid turnover in CNS

Fe²⁺

Iron

Oxygen transport; dopamine synthesis (tyrosine hydroxylase cofactor)

Zn²⁺

Zinc

Cofactor in neurotransmission and antioxidant enzymes; dopamine modulation

Mg²⁺

Magnesium

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

Se^2-

Selenium

Antioxidant enzyme cofactor (GPx); supports redox balance

Ca²⁺

Calcium

Bone health; neurotransmission; interacts with vitamin D and K2

K⁺

Potassium

Electrolyte for nerve transmission, muscle function, and blood pressure regulation

Choline

Acetylcholine precursor; methyl donor; phospholipid synthesis for membranes

Vitamin B9 (Folate; 5-MTHF)

One-carbon metabolism; methylation; homocysteine recycling

Vitamin B6 (Pyridoxine → PLP)

PLP cofactor for neurotransmitter synthesis; relies on brain PDXK activation

References

[1] Protein quality evaluation framework (DIAAS) FAO 2013

[2] Plant-protein adequacy, limiting amino acids, and practical complementarity Mariotti & Gardner 2019

[3] Cook-cool-reheat rice and resistant starch/glycaemic response Zhou et al. 2014