Brown rice or jasmine rice: closer on blood sugar than the labels suggest

In a meta-analysis of 7 trials in 417 adults with prediabetes or type 2 diabetes, eating brown rice instead of white rice did not change HbA1c (p = 0.15) or fasting glucose (p = 0.95). The evidence is of low to moderate quality, from short trials, and some of them were not randomized. Brown rice did lower body weight in those trials, by 4.9 lb (95% CI 2.8 to 6.9; metric: 2.2 kg, 1.26 to 3.13). Jasmine rice is a fragrant white rice, and only one study has tested it against brown rice. On a single test meal it measured a glycemic index of 80 for jasmine and 78 for brown in Chinese adults, and 68 and 65 in Europeans. That study did not compare the two rices statistically, so treat them as close. A systematic review of rice studies found that brown rice gives a lower blood sugar response than white only when both are cooked for the same time. At the longer cooking times brown rice usually gets, the gap became small and inconsistent.

How much is actually in it

• Per 100 g boiled, UK data give brown rice 132 calories, 1.5 g fiber and 48 mg magnesium against 131 calories, 0.5 g fiber and 5 mg magnesium for white long-grain rice. — UK composition data, boiled in unsalted water (n = -) Evidence E source
  Brown vs white: energy 132 vs 131 calories; AOAC fiber 1.5 vs 0.5 g; protein 3.6 vs 2.8 g; Mg 48 vs 5 mg; K 62 vs 12 mg; iron 0.53 vs 0.04 mg

What a real portion looks like

• US survey data weigh 1 cup of cooked brown rice at 195 g, with a default portion of 5.2 oz (147 g). — FNDDS portion weights, brown rice cooked, no added fat (n = -) Evidence E source
  1 cup cooked 195 g; quantity not specified 147 g

What your body absorbs

• In a crossover trial in 10 healthy adults, brown rice emptied from the stomach more slowly than white rice, whatever the amylose content, which the authors tie to the bran layer. — Healthy adults, six cooked rice samples with 50 g available carbohydrate each (n = 10) Evidence B source
  Gastric emptying slower for low- and high-amylose brown rice than white rice (p < 0.05)
• In a crossover trial, brown rice had a 12.1% lower glycemic index than milled rice of the same variety in healthy adults and a 35.6% lower one in people with type 2 diabetes. — 10 healthy and 9 type 2 diabetic volunteers, single test meals (n = 19) Evidence B source
  GI -12.1% (healthy), -35.6% (diabetic); glycemic area -19.8% and -35.2% (p < 0.05)
• The one study that tested both, against a glucose reference, measured a glycemic index of 78 for brown rice and 80 for jasmine rice in Chinese adults, and 65 and 68 in Europeans. — 32 Chinese and 31 European adults (n = 63) Evidence C source
  Brown 78 vs 65 (P = 0.054); jasmine 80 vs 68 (P = 0.033), Chinese vs Europeans

What cooking and storage change

• A systematic review found rice glycemic index ranging from 48 to 93, and brown rice beat white rice only at equal cooking times, not at the longer times brown rice usually needs. — Published glycemic response studies of rice up to July 2014 (n = -) Evidence A source
  GI range 48-93; insulinemic index 39-95; brown < white only at identical cooking times
• In a 2-week crossover trial in 31 adults with type 2 diabetes, less-processed whole grains including brown rice gave 9% lower post-breakfast glucose than the same grains finely milled. — Free-living adults with type 2 diabetes in New Zealand, two 2-week periods (n = 31) Evidence B source
  Postprandial glucose -9% (95% CI 3-15) after breakfast, -6% (1-10) after all meals
• Laboratory data show cooking brown rice in excess water cuts its inorganic arsenic by about 50%, against 40% for polished long-grain rice. — Multiple US market rice varieties, rinsed and unrinsed, varying cooking water (n = -) Evidence D source
  Inorganic As -50% brown, -40% long grain polished, -60% parboiled

What it does to your health

• In the same meta-analysis, brown rice instead of white rice lowered body weight by 4.9 lb (2.2 kg) and slightly raised HDL cholesterol in adults with prediabetes or type 2 diabetes. — Adults with prediabetes or type 2 diabetes, 7 trials (n = 417) Evidence A source
  Weight MD -4.9 lb (95% CI -6.9 to -2.8; metric: -2.2 kg, -3.13 to -1.26); HDL MD 0.10 (95% CI 0.02 to 0.17), unit not stated in abstract; LDL, waist and blood pressure unchanged
• A meta-analysis of 16 cohort studies links brown rice with lower type 2 diabetes risk and white rice with higher risk, though the rice results rest 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 a day; brown rice inverse, white rice positive, few studies
• Observational NHANES data link higher intake of whole-wheat bread, oats and brown rice with 24% lower odds of high uric acid. — US adults, NHANES 2001-2020, 886 with hyperuricemia and 2171 matched controls (n = 3057) Evidence C source
  OR 0.76 (95% CI 0.62-0.93), highest vs lowest intake

Safety, limits and interactions

• Observational data on 207,556 US adults link neither white nor brown rice, even 5 or more servings a week, with cardiovascular disease risk. — Nurses' Health Study I and II and Health Professionals Follow-Up Study, up to 26 years (n = 207556) Evidence C source
  HR 0.98 (95% CI 0.84-1.14) white rice; 1.01 (0.79-1.28) brown rice, >=5 vs <1 serving/week
• FDA sets an action level of 100 ppb inorganic arsenic for infant rice cereals and notes white rice cereals tend to carry less inorganic arsenic than brown rice cereals. — Infant rice cereals sold in the US (n = -) Evidence E source
  Action level 100 ug/kg (100 ppb)
• A case report describes a 14-year-old with exercise-induced anaphylaxis after polished rice, with IgE to a rice bran protein also present in polished rice, so she avoided both brown and white rice. — One 14-year-old girl in Japan (n = 1) Evidence D source
  Positive skin prick to bran and polished rice; anaphylaxis on exercise challenge after polished rice

What people believe that the data does not support

• The EU refused a claim that germinated brown rice (Vibigaba) helps maintain normal blood glucose. — EU health claim register (n = -) Evidence E source
  Non-authorized
• The EU also refused a claim that germinated brown rice (Vibigaba) contributes to weight loss on an energy-restricted diet. — EU health claim register (n = -) Evidence E source
  Non-authorized

Who this works differently for

• A meta-analysis of 7 trials in 417 adults with prediabetes or type 2 diabetes found that swapping white rice for brown rice did not change HbA1c or fasting glucose. — Adults with prediabetes or type 2 diabetes, 7 randomized and controlled trials (n = 417) Evidence A source
  HbA1c p = 0.15; fasting glucose p = 0.95 versus white rice
• In a 3-month crossover trial in 166 overweight South Indian adults, parboiled brown rice did not beat white rice overall, but cut HbA1c by 0.18 points in those with metabolic syndrome. — Overweight adults aged 25-65 in Chennai, India, two ad libitum rice meals a day, 6 days a week, 3 months (n = 166) Evidence B source
  HbA1c -0.18 (se 0.08) % with metabolic syndrome vs +0.05 (se 0.05) % without (P-heterogeneity = 0.02)

What is still unknown

• No trial compares brown rice with jasmine rice over weeks, no US health claim names either, and national tables list no jasmine rice or brown rice cooking retention factors. — Corpus, claim registers and composition datasets (n = 0) Evidence E source
  No head-to-head trial; no named records

The bottom line

Where brown rice clearly differs is the bran. UK composition data for boiled rice give brown rice 1.5 g fiber, 48 mg magnesium and 0.53 mg iron per 3.5 oz (100 g), against 0.5 g, 5 mg and 0.04 mg for white long-grain rice. Jasmine has no record of its own, so white long grain is the nearest stand-in. Energy is the same, 132 against 131 calories. A cup of cooked brown rice weighs 6.9 oz (195 g) in US survey data. Short trials show a smaller effect than the reputation. In a crossover test on 10 healthy and 9 diabetic volunteers, brown rice had a 12.1% lower glycemic index than milled rice of the same variety in the healthy group and 35.6% lower in the diabetic group, from single meals. In 31 New Zealand adults with type 2 diabetes, less-processed whole grains lowered glucose after breakfast by 9% (95% CI 3 to 15) over 2 weeks, but brown rice was one of three grains and its share was not split out. In a 3-month trial in 166 overweight adults in Chennai, parboiled brown rice did not beat white rice overall. In the subgroup with metabolic syndrome it lowered HbA1c by 0.18 points, with a third of participants dropping out. Observational data point the same way and cannot show cause. A meta-analysis of 16 cohorts links brown rice with lower type 2 diabetes risk and white rice with higher risk, and the authors note the rice results rest on few studies. Pooled US cohorts of 207,556 adults followed up to 26 years found no link between cardiovascular disease and either rice at 5 or more servings a week (HR 1.01 for brown, 0.98 for white). The EU refused two claims for germinated brown rice, one on blood glucose and one on weight loss. Refusal means the evidence fell short at assessment. The cautions are arsenic and, rarely, allergy. In laboratory tests, cooking brown rice in excess water cut its inorganic arsenic by about 50% and polished long-grain rice by 40%, and jasmine was not reported separately. For infant rice cereals the FDA sets an action level of 100 ppb inorganic arsenic and notes that white rice cereals tend to carry less than brown ones. That applies to baby cereal, not to rice on an adult plate. A case report describes a 14-year-old in Japan with exercise-induced anaphylaxis after polished rice whose skin test was also positive to rice bran. Nobody has compared brown and jasmine rice over weeks of eating.

Sources

1. bjr-r5-15 · dataset
   CoFID 11-869 Rice, brown, wholegrain, boiled in unsalted water: Energy 132 kcal; AOAC fibre 1.5 g; Protein 3.6 g; Magnesium 48 mg; Potassium 62 mg; Iron 0.53 mg. CoFID 11-862 Rice, white, long grain, boiled in unsalted water: Energy 131 kcal; AOAC fibre 0.5 g; Protein 2.8 g; Magnesium 5 mg; Potassium 12 mg; Iron 0.04 mg
   CoFID 2021 (Public Health England), codes 11-869 and 11-862 · checked 2026-09-29
2. bjr-r5-16 · dataset
   FNDDS 56205018 Rice, brown, cooked, no added fat (fdc_id 2708414): 1 cup, cooked 195 g; Quantity not specified 147 g
   USDA FNDDS 2021-2023, food code 56205018 (fdc_id 2708414) · checked 2026-09-29
3. bjr-r5-03 · RCT (crossover)
   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. bjr-r5-04 · RCT (crossover)
   In healthy volunteers, the glycemic area and glycemic index were, respectively, 19.8% and 12.1% lower (p < 0.05) in brown rice than milled rice, while in diabetics, the respective values were 35.2% and 35.6% lower.
   Int J Food Sci Nutr, 2006 · checked 2026-09-29
5. bjr-r5-05 · clinical trial (non-randomized)
   The GIs of rice tended to be higher in the Chinese compared with the Europeans when glucose was used as a reference (jasmine 80 vs 68, P = 0.033; basmati 67 vs 57, P = 0.170; brown 78 vs 65, P = 0.054; Doongara 67 vs 55, P = 0.045; parboiled 72 vs 57, P = 0.011).
   Nutr J, 2014 · checked 2026-09-29
6. bjr-r5-06 · systematic review
   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
7. bjr-r5-07 · RCT (crossover)
   Postprandial responses were 9% (95% CI 3-15) lower following breakfast and 6% (1-10) lower following all meals of less-processed whole grains when compared with finely milled grains.
   Diabetes Care, 2020 · checked 2026-09-29
8. bjr-r5-12 · food analysis
   Excess water cooking reduces average inorganic As by 40% from long grain polished, 60% from parboiled and 50% from brown rice.
   Food Addit Contam Part A 2016 · checked 2026-09-29
9. bjr-r5-02 · meta-analysis
   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
10. bjr-r5-09 · meta-analysis of cohorts
    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
11. bjr-r5-11 · case-control
    Higher intake of legumes, nuts, and seeds (OR, 0.74; 95% CI, 0.57-0.96), grain products (OR, 0.78; 95% CI, 0.62-0.96), whole-wheat bread, oats, and brown rice (OR, 0.76; 95% CI, 0.62-0.93), eggs (OR, 0.85; 95% CI, 0.77-0.94), and milk products (OR, 0.64; 95% CI, 0.51-0.79) were associated with lower odds of hyperuricemia.
    Medicine (Baltimore), 2026 · checked 2026-09-29
12. bjr-r5-10 · cohort
    The multivariable-adjuted HR of developing CVD comparing ≥5 servings/wk with <1 serving/wk was 0.98 (95% CI: 0.84, 1.14) for white rice, 1.01 (0.79, 1.28) for brown rice, and 0.99 (0.90, 1.08) for total rice.
    Am J Clin Nutr, 2015 · checked 2026-09-29
13. bjr-r5-13 · regulatory guidance
    Both white rice and brown rice cereals showed improvement in meeting the 100 ppb level, but the improvement was greatest for white rice cereals, which tend to have lower levels of inorganic arsenic overall.
    US FDA, Final guidance on action level for inorganic arsenic in infant rice cereals, 2020 · checked 2026-09-29
14. bjr-r5-14 · case report
    Skin prick test results were positive for bran and polished rice, and exercise after consumption of polished rice resulted in anaphylaxis.
    Arerugi, 2024 · checked 2026-09-29
15. bjr-r5-17 · health claim register
    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
16. bjr-r5-18 · health claim register
    POL-HC-8509 Vibigaba (germinated brown rice) In the context of an energy-restricted diet contributes to weight loss. -/- Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-8509, snapshot 2026-09-21 · checked 2026-09-29
17. bjr-r5-01 · meta-analysis
    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.
    PeerJ, 2021 · checked 2026-09-29
18. bjr-r5-08 · RCT (crossover)
    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
19. bjr-r5-19 · search result
    corpus_search.py (jasmine OR Thai rice OR fragrant rice) AND (glyc* OR amylose): no chronic brown vs jasmine trial; claims_search.py brown rice / jasmine rice: nothing in 21 CFR 101; retention_search.py brown rice / jasmine rice: no method; cofid_search.py and fndds_search.py jasmine rice: nothing; variability_search.py: nothing found
    Bioma corpus and dataset search (PubMed corpus, 21 CFR 101, USDA R6, CoFID 2021, FNDDS), 2026-09-29 · checked 2026-09-29