Brown rice or white basmati: a little weight, no change in blood sugar

A meta-analysis of 7 trials in 417 adults with prediabetes or type 2 diabetes found that swapping white rice for brown rice left HbA1c and fasting glucose unchanged, and that pool included controlled trials that were not randomized. Body weight fell by 4.9 lb (2.2 kg) on brown rice, with a 95% confidence interval of 2.8 to 6.9 lb (1.26 to 3.13 kg). A systematic review of rice feeding studies found glycemic index values from 48 to 93. Brown rice always came out lower than white when both were cooked for the same time. At the longer times brown rice is normally cooked, the gap became small and inconsistent. In 166 overweight adults in Chennai, three months of parboiled brown rice in place of white did not change glucose, insulin or blood lipids overall. HbA1c fell by 0.18 percentage points in those with metabolic syndrome against a rise of 0.05 in those without, an exploratory subgroup result from a trial that lost a third of its participants. We have no trial that compared basmati with brown rice directly.

How much is actually in it

• UK food tables list boiled brown basmati at 131 calories, 1.2 g fiber and 3.3 g protein per 3.5 oz (100 g), against 117 calories, 0.6 g fiber and 2.8 g protein for boiled white basmati. — CoFID 2021 records for basmati rice boiled in unsalted water (n = 2 records) Evidence E source
  Brown basmati 131 calories, AOAC fiber 1.2 g, protein 3.3 g, fat 1.1 g; white basmati 117 calories, fiber 0.6 g, protein 2.8 g, fat 0.7 g per 3.5 oz (100 g)

What a real portion looks like

• The US dietary survey counts one cup of cooked brown rice as 195 g. — USDA FNDDS food code 56205018, Rice, brown, cooked, no added fat Evidence E source
  1 cup cooked = 195 g; quantity not specified = 147 g

What your body absorbs

• In a crossover feeding study in 10 healthy adults eating rice portions with 50 g available carbohydrate, brown rice emptied from the stomach more slowly than white rice, regardless of amylose content. — Healthy adults, acute test meals of 6 rice samples (n = 10) Evidence B source
  Slower gastric emptying for brown vs white rice (p < 0.05)

What cooking and storage change

• A systematic review of postprandial studies found rice glycemic index values from 48 to 93, with brown rice lower than white at equal cooking times but the gap shrinking at the longer times brown rice is usually cooked. — Original human studies of glycemic response to rice up to July 2014 Evidence A source
  GI 48-93; insulinemic index 39-95; milling effect clear at identical cooking time, small and inconsistent at longer brown-rice cooking times
• In a glycemic index test of basmati rice, rice boiled by absorption and stored at 39 °F (4 °C) for 24 h had the lowest glycemic index at 45.8, below other boiling and pressure cooking. — Volunteers eating 50 g carbohydrate portions of cooked basmati (PB1121), number not reported in Methods Evidence C source
  GI 45.8 (boiling by absorption, chilled 24 h) vs 49.5 (boiled in excess water) and 50.7 (pressure cooked)
• Animal data suggest basmati rice boiled by absorption and chilled for 24 h lowered blood glucose in diabetic rats by 29.7%, versus 14.7% for freshly cooked rice. — Diabetic rats Evidence D source
  Blood glucose decrease 29.7% (chilled) vs 14.7% (fresh) vs 15.9% (reheated)

What it does to your health

• A meta-analysis of 7 trials in 417 adults with prediabetes or type 2 diabetes found swapping white rice for brown rice did not change HbA1c or fasting glucose but lowered body weight by 4.9 lb (2.2 kg). — Adults with prediabetes or type 2 diabetes (n = 417) Evidence A source
  HbA1c p = 0.15 and FBG p = 0.95 (no effect); body weight MD -4.9 lb (95% CI -6.9 to -2.8; metric: -2.2 kg, -3.13 to -1.26); HDL +0.10 (95% CI 0.02-0.17)
• Observational data from 16 cohort studies link 3 daily servings of whole grains to a 32% lower type 2 diabetes risk, with brown rice inversely and white rice positively associated, based on few studies. — Prospective cohort studies of grain intake (n = 16 cohorts) Evidence C source
  Whole grains RR 0.68 (95% CI 0.58-0.81) per 3 servings/day; refined grains RR 0.95 (0.88-1.04)

Safety, limits and interactions

• A US national survey of 2635 infants and toddlers found 58.2% of those aged 6 to 11.9 months ate rice or rice foods, averaging 11.9 g of rice a day among consumers. — US infants and toddlers 0-24 months, FITS 2016 (n = 2635) Evidence C source
  58.2% of 6-11.9-month-olds consumed rice; mean 11.9 g/day among consumers
• A Beijing study of 160 rice samples including brown rice found inorganic arsenic made up 58% of total arsenic, with an average lifetime cancer risk of 1.73 in 10,000 from rice. — 160 rice samples (japonica, indica, glutinous, brown) and Beijing residents' intake (n = 160 samples) Evidence C source
  IAs 58.34% of total As (43.18-71.88%); carcinogenic risk 1.73 x 10-4

What people believe that the data does not support

• The EU did not authorize the claim that germinated brown rice (Vibigaba) contributes to normal blood glucose levels. — EU health claim application Evidence E source
  Non-authorized

Who this works differently for

• In a randomized crossover trial in 166 overweight adults in India, eating parboiled brown rice instead of white rice for 3 months did not change glucose, insulin or lipids overall, with HbA1c falling 0.18% only in those with metabolic syndrome. — Overweight adults aged 25-65 in Chennai, two ad libitum rice meals a day, 6 days a week, 3 months (n = 166) Evidence B source
  No overall between-group difference; HbA1c -0.18 (se 0.08)% in metabolic syndrome vs +0.05% without (P-heterogeneity = 0.02)

The bottom line

Per 100 g boiled in unsalted water, UK tables give brown basmati 131 calories, 1.2 g of fiber and 3.3 g of protein, and white basmati 117 calories, 0.6 g of fiber and 2.8 g of protein, one record for each. US survey data count a cup of cooked brown rice as 195 g and have no separate code for basmati. In 10 healthy adults eating portions with 50 g of available carbohydrate, brown rice left the stomach more slowly than white rice in a single-meal test. Observational data from 16 cohort studies link 3 daily servings of whole grains with a 32% lower risk of type 2 diabetes (RR 0.68, 95% CI 0.58 to 0.81). Brown rice on its own was inversely associated and white rice positively associated, both resting on few studies. Cooling basmati moved its number a little. In one glycemic index test of a single basmati variety, rice boiled until the water was absorbed and then kept at 39 °F (4 °C) for 24 hours scored 45.8, against 49.5 for rice boiled in excess water and 50.7 for pressure-cooked rice. That test was not randomized and did not report how many volunteers took part. In diabetic rats the chilled rice lowered blood glucose by 29.7% against 14.7% for freshly cooked rice, an animal result only. The EU did not authorize the claim that germinated brown rice, sold as Vibigaba, contributes to normal blood glucose levels. The caution on this page is arsenic. In 160 rice samples from Beijing, brown rice among them, inorganic arsenic made up 58% of total arsenic. The estimated average lifetime cancer risk from rice for Beijing residents was 1.73 in 10,000, and brown rice was not given a figure of its own. Infants meet rice early. In a US survey of 2635 children under two, 58.2% of those aged 6 to 11.9 months ate rice or a rice food on the recorded day, averaging 11.9 g among those who did, and that survey did not measure arsenic. The cancer risk figure above is an average for Beijing residents, not a figure for infants, and we have no card on arsenic exposure in infants, so this page cannot say that rice, brown or white, is safe for them. The weight and blood sugar results above come from adults and say nothing about feeding brown rice to infants. We have no card on rice in pregnancy or alongside medicines, so their absence here says nothing about safety.

Sources

1. bbr-daily-r7-01 · CoFID 2021, dataset
   Rice, brown, basmati, boiled in unsalted water (CoFID 11-867): Energy 131 kcal, AOAC fibre 1.2 g, Protein 3.3 g, Fat 1.1 g per 100 g; Rice, white, basmati, boiled in unsalted water (CoFID 11-858): Energy 117 kcal, AOAC fibre 0.6 g, Protein 2.8 g, Fat 0.7 g per 100 g
   CoFID 2021 (Public Health England), codes 11-867 and 11-858 · checked 2026-09-29
2. bbr-daily-r7-02 · USDA FNDDS portion, dataset
   Rice, brown, cooked, no added fat (FNDDS 56205018, FDC 2708414, WWEIA Rice): 1 cup, cooked = 195 g; Quantity not specified = 147 g
   USDA FNDDS 2021-2023, food code 56205018, FDC 2708414 · checked 2026-09-29
3. bbr-daily-r7-05 · Crossover feeding study
   Ten healthy adult participants were recruited for a crossover design study involving acute feeding and testing of 6 rice samples (50 g available carbohydrate). ... In human subjects, low-amylose and high-amylose brown rice delayed gastric emptying compared to white rices regardless of amylose content or temperature-cycling (p < 0.05).
   Eur J Clin Nutr, 2018 · checked 2026-09-29
4. bbr-daily-r7-06 · Systematic review
   Based on a glucose reference value of 100, the observed glycaemic index values for rice varieties ranged from 48 to 93, while the insulinaemic index ranged from 39 to 95. ... The milling process shows a clear effect when compared at identical cooking times, with brown rice always producing a lower PPG and PPI response than white rice. However, at longer cooking times normally used for the preparation of brown rice, smaller and inconsistent differences are observed between brown and white rice.
   Br J Nutr, 2015 · checked 2026-09-29
5. bbr-daily-r7-08 · Glycemic index study
   The lowest glycaemic index was observed after the consumption of basmati rice prepared via the boiling 1 method (45.8%) with T3, followed by boiling 2 (49.5%) and pressure cooked rice (50.7%).
   Foods, 2024 · checked 2026-09-29
6. bbr-daily-r7-09 · Animal study
   The diets provided in G3, G4, and G5 resulted in A 14.7, 29.7, and 15.9% decrease in the blood glucose levels of the rats.
   Foods, 2024 · checked 2026-09-29
7. bbr-daily-r7-03 · Meta-analysis of RCTs and controlled trials
   Seven trials involving 417 adults with prediabetes or type 2 diabetes were included in this study. Brown-rice diet did not improve the glycemic control because it had no effect on the HbA1c level (p = 0.15) and the FBG level (p = 0.95) compared to white-rice diet. Brown-rice diet reduced body weight (p < 0.00001; MD -2.2 kg; 95% CI [-3.13 to -1.26]; I 2 = 0%).
   PeerJ, 2021 · checked 2026-09-29
8. bbr-daily-r7-07 · Meta-analysis of cohort studies
   The summary relative risk per 3 servings per day was 0.68 (95% CI 0.58-0.81, I(2) = 82%, n = 10) for whole grains and 0.95 (95% CI 0.88-1.04, I(2) = 53%, n = 6) for refined grains. ... Inverse associations were observed for subtypes of whole grains including whole grain bread, whole grain cereals, wheat bran and brown rice, but these results were based on few studies, while white rice was associated with increased risk.
   Eur J Epidemiol, 2013 · checked 2026-09-29
9. bbr-daily-r7-10 · Cross-sectional survey
   Percentage consuming rice or rice-containing foods was highest for infants aged 6-11.9 months (58.2%), including snacks (32.1%), infant cereal (27.9%), baby food purees (11.1%), and cooked rice (7.7%). Among infants 6-11.9 months of age who consumed rice, mean intake of rice from all sources was 11.9 ± 0.8 g/d (mean ± standard error [SE]), and although most frequently reported, snacks provided the least quantity of rice (2.0 ± 0.2 g/d).
   J Acad Nutr Diet, 2025 · checked 2026-09-29
10. bbr-daily-r7-11 · Cross-sectional risk assessment
    The proportion of iAs to total As (tAs) was 58.34%, with a range of 43.18-71.88%. ... In comparison with the acceptable non-cancer risk, which had a HQ value of 0.38, the carcinogenic risk of the population in Beijing was 1.73 × 10-4 on average.
    Environ Geochem Health, 2022 · checked 2026-09-29
11. bbr-daily-r7-12 · regulatory register entry
    POL-HC-8510 Vibigaba (germinated brown rice) Contributes to the maintenance of normal blood glucose levels. -/- Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-8510, snapshot 2026-09-21 · checked 2026-09-29
12. bbr-daily-r7-04 · Randomized crossover trial
    We did not observe significant between-group differences for primary outcomes among all participants. However, a significant reduction in HbA1c was observed in the brown rice group among participants with the metabolic syndrome (-0·18 (se 0·08) %) relative to those without the metabolic syndrome (0·05 (se 0·05) %) (P-for-heterogeneity = 0·02).
    Br J Nutr, 2019 · checked 2026-09-29