Is brown rice good for weight loss?

Slightly, if it replaces white rice, and even that is uncertain. A meta-analysis of 13 randomized trials found brown rice instead of white rice cut weight by 3.6 lb (95% CI 2.4 to 4.7; metric: 1.63 kg, 1.11 to 2.15), pooled from the 6 trials that measured it, and waist by 1 in (2.56 cm). The reviewers rated that evidence low to very low certainty, and the trials disagreed with each other very strongly. A second meta-analysis of 11 trials in 1,034 people found no clear difference in waist, and only HDL cholesterol differed.

Unsettled. Two reviews of the same question point in different directions, and the one with the larger effect rests on trials that varied enormously. What both allow is a small change at most, inside the short trials that were run.

What the trials found

Brown rice in place of white rice

The larger pooled result, 3.6 lb (1.63 kg), came with a fall in BMI of 0.58 kg/m2 and in waist of 1 in (95% CI 0.1 to 1.9; metric: 2.56 cm, 0.26 to 4.86). The second review, of trials at least 2 weeks long, found waist fell by 0.31 in (95% CI -0.21 to 0.83; metric: 0.79 cm, -0.53 to 2.11), which did not reach significance. Only HDL cholesterol differed between the brown and white rice groups. Most of its trials had some concern for risk of bias.

In adults who already had prediabetes or type 2 diabetes, 7 trials in 417 people found brown rice lowered body weight by 4.9 lb (95% CI 2.8 to 6.9; metric: 2.2 kg, 1.26 to 3.13) against white rice, with little disagreement between trials. Waist did not change significantly, and neither did HbA1c. That review mixed randomized and non-randomized controlled trials.

Single trials are short and small. In a crossover trial of 40 Iranian women with overweight or obesity, 150 g a day of cooked brown rice instead of white rice for 6 weeks gave 2.6 lb (1.2 kg) more weight loss (95% CI 0.60 to 1.96) and 0.94 in (2.38 cm) off the waist. Thirty-five of them finished. In a 6-week trial in 40 Korean women with overweight, a low-energy meal replacement made with brown and black rice, eaten three times a day with no other food, gave lower weight, BMI and body fat than the same replacement made with white rice. The abstract does not say by how much.

Whole grains in general

Myth. Eating more whole grains on its own does not cause meaningful weight loss. A meta-analysis of 19 randomized trials in 1,698 adults found no significant effect of whole grains on body weight. A network meta-analysis of 152 trials of single foods found whole grains gave 0.97 lb (0.44 kg) of weight loss (95% CrI 0 to 0.88), on very low certainty evidence, well below the 8.6 lb (3.9 kg) that counts as clinically important. No single food group in that analysis reached that threshold.

In observational studies

In 437 Japanese factory workers followed for a year, eating a lot of white rice was linked to gaining 6.6 lb (3 kg) or more, and eating brown or multigrain rice was not. Across prospective studies, higher whole-grain intake was linked to a 7 percent lower risk of overweight or obesity (RR 0.93, 95% CI 0.89 to 0.96) and refined grains to a 5 percent higher risk. The review did not report the absolute risks behind those percentages, and observational data like these show association, not effect.

Who should be careful

Not for everyone. Brown rice cereals for infants tend to carry more inorganic arsenic than white rice ones. The FDA set an action level of 100 ppb inorganic arsenic for infant rice cereals and noted that white rice cereals tend to have lower levels than brown rice cereals. That finding is about baby cereals. For pregnant women the FDA advises eating a variety of grains as part of a well-balanced diet, and we found no FDA limit for adults eating rice.

Cooking changes the dose. The FDA says cooking rice like pasta, in plenty of water that is then drained, can cut its inorganic arsenic by 40 to 60 percent depending on the rice. The same method lowers folate, iron, niacin and thiamine in enriched rice by 50 to 70 percent. The FDA page does not discuss brown rice separately.

What expert bodies say

We found no expert body that makes a weight claim for brown rice. The EU register of health claims has no authorized claim for brown rice at all. Its brown rice entries, one of them on weight, are all non-authorized, including a claim about germinated brown rice and blood glucose. The FDA position that matters here is about arsenic, set out above.

How we searched

What would change this answer

• A parallel randomized trial of 6 to 12 months comparing brown and white rice at equal calories in people with overweight, with body weight as the main outcome, ideally where people eat a lot of rice. Nothing like it is registered on ClinicalTrials.gov.
• A reanalysis that explains why the two brown rice reviews disagree, starting with whether pre-germinated brown rice behaves differently from ordinary brown rice.
• Measured arsenic exposure in adults who eat brown rice daily. The numbers we have are for infant cereals.

What is in a serving of brown rice, nutrient by nutrient, is on the brown rice page.

Sources

1. ev-brwl-01 · Meta-analysis or systematic review · systematic review and meta-analysis of RCTs with GRADE · n = 13 trials
   As reported, brown rice significantly reduced weight by -1.63 kg (95% CI: -2.15 to -1.11, I2=97%, n = 6), body mass index (BMI) by -0.58 kg/m2 (95% CI: -0.78 to -0.37, I2=96%, n = 6), and waist circumference by -2.56 cm (95% CI: -4.86 to -0.26, I2=88%, n = 5) compared with white rice.
   
   Who: adults in randomized trials comparing brown rice with white rice; weight pooled from 6 trials
   Effect: weight -3.6 lb (95% CI -4.7 to -2.4, I2 97%, 6 trials; metric: -1.63 kg, -2.15 to -1.11); BMI -0.58 kg/m2 (-0.78 to -0.37); waist -1 in (-1.9 to -0.1; metric: -2.56 cm, -4.86 to -0.26); GRADE low and very low
   Certainty: very high heterogeneity; pre-germinated brown rice trials drive part of the effect; outside PubMed snapshot
   Golzarand M, et al. Crit Rev Food Sci Nutr. 2022 · checked 2026-10-06 · we read the abstract
2. ev-brwl-02 · Meta-analysis or systematic review · systematic review and meta-analysis of cohorts and RCTs, NutriGrade · n = 1,034
   FBG (−0.06 mmol/L; −0.23 to 0.11; I2=59.56%), and waist circumference (−0.79 cm; −2.11 to 0.53; I2=76.97 %) favoured the brown rice group.
   
   Who: adults in RCTs of at least 2 weeks replacing white rice with brown rice
   Effect: waist -0.31 in (95% CI -0.83 to 0.21, I2 77%; metric: -0.79 cm, -2.11 to 0.53); HDL +2.3 mg/dL (0 to 4.3; metric: 0.06 mmol/L, 0.00 to 0.11); no other significant differences
   Certainty: disagrees with ev-brwl-01 on adiposity; most RCTs had some concern for risk of bias
   BMJ Open. 2022;12:e065426. White rice, brown rice and the risk of type 2 diabetes: a systematic review and meta-analysis · checked 2026-10-06 · we read the fulltext
3. ev-brwl-03 · Randomized controlled trial(s) · meta-analysis of RCTs and controlled clinical trials · n = 417
   Brown-rice diet reduced body weight (p < 0.00001; MD -2.2 kg; 95% CI [-3.13 to -1.26]; I 2 = 0%). However, it had no effect on the waist circumference (p = 0.09), systolic blood pressure (p = 0.60) and diastolic blood pressure level (p = 0.40).
   
   Who: adults with prediabetes or type 2 diabetes; brown rice vs white rice diets
   Effect: body weight MD -4.9 lb (95% CI -6.9 to -2.8; metric: -2.2 kg, -3.13 to -1.26), I2 0%; waist p = 0.09; HbA1c p = 0.15
   Certainty: includes non-randomized controlled trials, so B; low to moderate quality evidence
   PeerJ, 2021 · checked 2026-10-06 · we read the abstract
4. ev-brwl-04 · Meta-analysis or systematic review · systematic review and meta-analysis of RCTs · n = 1,698
   Based on 22 effect sizes from 19 studies on body weight, with a total sample of 1698 adults, we found no significant effect of whole-grain consumption on body weight.
   
   Who: adults aged 18 and over in RCTs of whole-grain products or diets vs control
   Effect: no significant effect on body weight or BMI; body fat % WMD 0.27 (95% CI -0.05 to 0.58); waist WMD 0.02 in (-0.2 to 0.25; metric: 0.06 cm, -0.50 to 0.63)
   Certainty: whole grains in general, not brown rice alone
   Adv Nutr, 2020 · checked 2026-10-06 · we read the abstract
5. ev-brwl-05 · Meta-analysis or systematic review · systematic review and network meta-analysis of RCTs · n = 9,669
   Increased consumption of fish (MD - 0.85 kg, 95% CrI - 1.66, - 0.02; GRADE = low), whole grains (MD - 0.44 kg, 95% CrI - 0.88, 0.0; GRADE = very low), and nuts (MD - 0.37 kg, 95% CI - 0.72, - 0.01; GRADE = low) demonstrated trivial weight loss, well below minimal clinically important threshold (3.9 kg), when compared with the control group.
   
   Who: adults in 152 randomized trials of single foods or food groups for weight loss
   Effect: whole grains MD -0.97 lb (-0.44 kg) (95% CrI -0.88 to 0.0), GRADE very low; no food group gave important weight loss in people with overweight or obesity
   Certainty: answers the myth that one food (such as brown rice) causes weight loss on its own
   Eur J Nutr, 2023 · checked 2026-10-06 · we read the abstract
6. ev-brwl-06 · Randomized controlled trial(s) · randomized crossover trial · n = 40
   Mean difference changes were 1.2 kg (95% confidence interval [CI] =0.60-1.96, P = 0.001), 2.38 cm (95% CI = 0.51-4.25, P = 0.014), 2.98 cm (95% CI = 1.55-4.42, P ≤ 0.001) and 0.52 kg/m2 (95% CI = 0.26-0.78, P ≤ 0.001) respectively.
   
   Who: non-menopausal women with BMI >25, mean age 32.6 years, 150 g cooked brown or white rice daily, 6-week periods with 2-week washout; 35 completed
   Effect: weight 2.6 lb (95% CI 1.3 to 4.3; metric: 1.2 kg, 0.60 to 1.96); waist 0.94 in (0.2 to 1.7; metric: 2.38 cm, 0.51 to 4.25); hip 1.2 in (2.98 cm); BMI 0.52 kg/m2
   Certainty: small, short, Iranian women only; dropouts in one sequence
   Kazemzadeh M, et al. Int J Prev Med. 2014;5(4):478-488 · checked 2026-10-06 · we read the fulltext
7. ev-brwl-07 · Randomized controlled trial(s) · randomized controlled trial, 6 weeks · n = 40
   The subjects showed a significant reduction in weight, body mass index, and body fat (%) during the experimental period, with the BRBL group exhibiting levels of all 3 parameters significantly lower than those of the WR group (P < .05).
   
   Who: Korean women aged 20 to 35 with BMI of 25 or more; low-energy meal replacement 3 times a day, no other food
   Effect: weight, BMI and body fat % significantly lower in the brown and black rice group than the white rice group (P < .05); size not given in abstract
   Certainty: mixed brown and black rice inside a very-low-energy meal replacement; effect size not reported in abstract
   Nutr Res, 2008 · checked 2026-10-06 · we read the abstract
8. ev-brwl-08 · Observational data · prospective cohort, 1 year · n = 437
   The consumption of white rice, but not brown rice/multi-grain rice, was positively correlated with the risk of a 1-year body weight gain of 3 kg or more.
   
   Who: Japanese factory workers, 1-year nutrition and lifestyle cohort
   Effect: high vs low white rice: higher risk of weight gain of 6.6 lb (3 kg) or more (p = 0.034); brown/multigrain rice: no difference (p = 0.387)
   Certainty: observational, small, brown and multigrain rice pooled
   Appl Physiol Nutr Metab, 2019 · checked 2026-10-06 · we read the abstract
9. ev-brwl-09 · Observational data · systematic review and dose-response meta-analysis of prospective studies · n = 43 reports
   In the dose-response meta-analysis, inverse associations were found for whole-grain (RRoverweight/obesity: 0.93; 95% CI: 0.89, 0.96), fruit (RRoverweight/obesity: 0.93; 95% CI: 0.86, 1.00; RRweight gain: 0.91; 95% CI: 0.86, 0.97), nut (RRabdominal obesity: 0.42; 95% CI: 0.31, 0.57), legume (RRoverweight/obesity: 0.88; 95% CI: 0.84, 0.93), and fish (RRabdominal obesity: 0.83; 95% CI: 0.71, 0.97) consumption and positive associations were found for refined grains (RRoverweight/obesity: 1.05; 95% CI: 1.00, 1.10), red meat (RRabdominal obesity: 1.10; 95% CI: 1.04, 1.16; RRweight gain: 1.14; 95% CI: 1.03, 1.26), and SSBs (RRoverweight/obesity: 1.05; 95% CI: 1.00, 1.11; RRabdominal obesity: 1.12; 95% CI: 1.04, 1.20).
   
   Who: prospective observational studies of food groups and adiposity
   Effect: whole grain RR overweight/obesity 0.93 (95% CI 0.89 to 0.96); refined grains RR 1.05 (1.00 to 1.10); NutriGrade very low to low
   Certainty: observational; whole grains in general
   Adv Nutr, 2019 · checked 2026-10-06 · we read the abstract
10. ev-brwl-10 · Position of an expert body · agency guidance · n = —
    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.
    
    Who: infant rice cereals sold in the US
    Effect: action level 100 ug/kg (100 ppb) inorganic arsenic
    Certainty: about infant cereals, not table rice; for someone who eats brown rice daily, an argument for grain diversity
    US FDA, Final guidance on action level for inorganic arsenic in infant rice cereals, 2020 · checked 2026-10-06 · we read the section
11. ev-brwl-11 · Position of an expert body · agency guidance · n = —
    Pregnant women are also advised to eat a variety of grains as part of a well-balanced diet.
    
    Who: pregnant women in the US
    Effect: advice: variety of grains, not rice only
    Certainty: position of an authority on arsenic; no quantitative limit for adults
    US FDA, Final guidance on action level for inorganic arsenic in infant rice cereals, 2020 · checked 2026-10-06 · we read the section
12. brr1-daily-r1-14 · Position of an expert body · agency guidance page · n = —
    Published studies, including research by the FDA, show that cooking rice similar to how pasta is cooked can reduce 40 to 60 percent of the inorganic arsenic content, depending on the type of rice.
    
    Who: US consumer guidance on arsenic in rice
    Effect: inorganic arsenic reduced 40-60% by excess-water cooking; the same method lowers folate, iron, niacin and thiamine in enriched rice by 50-70%
    Certainty: Authority position; the page does not speak about brown rice separately.
    U.S. Food and Drug Administration, What You Can Do to Limit Exposure to Arsenic · checked 2026-09-29 · we read the section
13. brr1-daily-r1-17 · Position of an expert body · regulatory register entry · n = —
    POL-HC-8510 Vibigaba (germinated brown rice) Contributes to the maintenance of normal blood glucose levels. -/- Non-authorised
    
    Who: EU nutrition and health claims register, substance Vibigaba (germinated brown rice)
    Effect: 3 brown rice claims, all non-authorized (blood pressure, weight, blood glucose)
    Certainty: Rejection means insufficient evidence at the time of assessment.
    EU Register on nutrition and health claims, claim POL-HC-8510, snapshot 2026-09-21 · checked 2026-09-29 · we read the section