Is fruit juice good for weight loss?

No. In a 2024 meta-analysis, 19 randomized trials in adults found that 100% fruit juice did not change body weight compared with non-caloric drinks (mean difference -1.2 lb (95% CI -3.4 to 1.1; metric: -0.53 kg, -1.55 to 0.48)). The interval is wide and crosses zero. Juice also did not make people heavier in those trials, which is the other half of the honest answer.

Myth. Juice is not a weight-loss drink. Pooled trials of orange juice or hesperidin found no effect on weight, BMI or body fat, and a diet trial that added half a liter a day found no difference in weight lost. The trials looked for a benefit and did not find one.

What the trials found

A 2021 meta-analysis of 11 randomized trials in 512 adults tested orange juice or hesperidin supplements. Body weight did not change (weighted mean difference -0.68 lb (95% CI -3.2 to 1.8; metric: -0.31 kg, -1.44 to 0.82)), and neither did BMI, fat mass or waist size. The review pooled juice and hesperidin capsules together, so it cannot separate the two.

The diet trial in the chart enrolled 78 adults with obesity, mean BMI 33, for 12 weeks on a reduced-calorie diet. Half also drank 17 fl oz (500 mL) of 100% orange juice a day. Both groups lost about 14 lb (6.5 kg) and 2.5 BMI units. The trial was not blinded, and the juice was counted inside the calorie budget.

A crossover trial in 26 healthy young adults gave orange juice or caffeine-free cola at 20 percent of energy, between meals, for 2 weeks each with no limit on food. Body weight did not change with either drink. Two weeks per drink is a short test.

The largest body of trial data comes from a 2023 meta-analysis of 169 controlled feeding trials with 10,357 participants. Where 100% fruit juice was added at up to 10 percent of energy, the trials reported lower body weight, while added sugar-sweetened drinks and fruit drinks raised it. The abstract gives no size for the juice effect, so it shows that small amounts of juice did not add weight in those trials. It does not show that juice makes people lose it.

Unsettled. One product in this family did cut weight, and it is a capsule. A 2026 meta-analysis of 3 trials in 252 overweight and obese adults found Moro orange juice extract lowered weight by 4.6 lb (2.08 kg) against placebo (95% CI -3.50 to -0.67). That is a concentrated supplement tested in only three trials, and it says nothing about the juice in a carton.

What the cohorts add

Cohort studies in the same 2024 meta-analysis followed 45,851 children. Each extra daily serving of 100% fruit juice tracked with a BMI gain of 0.03 (95% CI 0.01 to 0.05). That is small, and no randomized trial in children exists to test it. In adult cohorts, juice was linked to 0.46 lb (0.21 kg) more weight gain (95% CI 0.15 to 0.27) only in studies that did not account for total calories. Studies that did account for calories found -0.18 lb (95% CI -0.24 to -0.11; metric: -0.08 kg, -0.11 to -0.05). The authors read this as juice acting through the calories it adds.

Who should be careful

Not for everyone. Children are the group the cautions are written for. The American Academy of Pediatrics says the high sugar in juice adds calories and raises the risk of dental caries. It also notes that juice lacks protein and fiber, which may predispose to inappropriate weight gain. The child cohorts above are the only place in this evidence where more juice tracked with more BMI.

For adults, the caution in our material is about sugar. WHO counts the sugars naturally present in fruit juices and juice concentrates as free sugars, the same category as sugar added by a cook or a manufacturer, and its guideline asks people to limit free sugars.

What expert bodies say

WHO treats juice sugar as free sugar. The American Academy of Pediatrics flags calories and tooth decay in children. The scoping review behind the 2023 Nordic Nutrition Recommendations concluded that the link between fruit juice and weight gain remains unclear and might be of concern for some groups of people. None of them describes juice as a weight-loss food.

How we searched

What would change this answer

• Randomized trials longer than six months comparing 100% juice with whole fruit or water, with weight as the outcome. The adult trials pooled so far are short. None was registered on ClinicalTrials.gov when we checked.
• Any randomized trial of juice and weight in children. The small BMI signal comes only from cohorts, and that is where the cautions are aimed.
• The juice-specific effect size from the 169-trial feeding meta-analysis, which would show how large the lower weight in its juice trials actually was.

For what fruit juice contains, see the fruit juice page, and for orange juice in particular the orange juice page.

Sources

1. ev-fjw-01 · Meta-analysis or systematic review · systematic review and meta-analysis of RCTs and prospective cohorts · n = 19 RCTs
   RCTs in adults found no significant association of assignment to 100% fruit juice with body weight but the CI was wide (MD, -0.53 kg; 95% CI, -1.55 to 0.48 kg).
   
   Who: adults in RCTs of at least 2 weeks; 100% fruit juice vs non-caloric controls
   Effect: MD -1.2 lb (95% CI -3.4 to 1.1; metric: -0.53 kg, -1.55 to 0.48)
   Certainty: Wide CI; short RCTs; full text in PMC without sections (no_fulltext).
   JAMA Pediatrics, 2024, 178(3):237-246 (Nguyen et al.) · checked 2026-10-07 · we read the abstract
2. ev-fjw-02 · Observational data · meta-analysis of prospective cohort studies · n = 17 cohorts, 45,851 children
   Among cohort studies in children, each additional serving per day of 100% fruit juice was associated with a 0.03 (95% CI, 0.01-0.05) higher BMI change.
   
   Who: children in 17 prospective cohorts, median age 8 years
   Effect: beta 0.03 (95% CI 0.01 to 0.05) higher BMI change per serving per day
   Certainty: Cohorts only, no RCTs in children; the effect is small.
   JAMA Pediatrics, 2024, 178(3):237-246 (Nguyen et al.) · checked 2026-10-07 · we read the abstract
3. ev-fjw-03 · Observational data · meta-analysis of prospective cohort studies · n = 6 cohorts
   Among cohort studies in adults, studies that did not adjust for energy showed greater body weight gain (0.21 kg; 95% CI, 0.15-0.27 kg) than studies that did adjust for energy intake (-0.08 kg; 95% CI, -0.11 to -0.05 kg; P for meta-regression <.001).
   
   Who: adults in 6 prospective cohorts
   Effect: 0.46 lb (0.33 to 0.6; metric: 0.21 kg, 0.15 to 0.27) unadjusted for energy vs -0.18 lb (-0.24 to -0.11; metric: -0.08 kg, -0.11 to -0.05) energy-adjusted
   Certainty: The authors interpret it as mediation by calories.
   JAMA Pediatrics, 2024, 178(3):237-246 (Nguyen et al.) · checked 2026-10-07 · we read the abstract
4. ev-fjw-04 · Meta-analysis or systematic review · systematic review and meta-analysis of controlled feeding trials · n = 169 trials, 10,357 participants
   There was interaction/influence by food sources on body weight: substitution trials [fruits decreased; added nutritive sweeteners and mixed sources (with SSBs) increased]; addition trials [dried fruits, honey, fruits (≤10%E), and 100% fruit juice (≤10%E) decreased; SSBs, fruit drink, and mixed sources (with SSBs) increased]; subtraction trials [removal of mixed sources (with SSBs) decreased]; and ad libitum trials [mixed sources (with/without SSBs) increased].
   
   Who: controlled feeding trials of at least 2 weeks; 14 food sources of fructose-containing sugars
   Effect: addition trials: 100% fruit juice (<=10% energy) decreased body weight; SSBs and fruit drinks increased; GRADE generally moderate
   Certainty: No separate figure for juice in the abstract; no full text in PMC (no_pmc).
   Am J Clin Nutr, 2023 · checked 2026-10-07 · we read the abstract
5. ev-fjw-05 · Meta-analysis or systematic review · meta-analysis of randomized controlled trials · n = 11 RCTs, 512 individuals
   The meta-analysis showed that orange juice and/or hesperidin had no significant effect on body weight [weighted mean difference (WMD) = -0.31 kg; 95% CI, -1.44 to 0.82, P = 0.592], body mass index [WMD = 0.11 kg/m2; 95% CI, -0.33 to 0.56, P = 0.617], fat mass [WMD = 0.14 kg; 95% CI, -0.95 to 1.22, P = 0.807], percentage body fat [WMD = -0.70%; 95% CI, -2.58 to 1.18, P = 0.463] and waist circumference [WMD = 0.07 cm; 95% CI, -1.16 to 1.30, P = 0.588].
   
   Who: adults in RCTs of orange juice and/or hesperidin supplementation
   Effect: body weight WMD -0.68 lb (95% CI -3.2 to 1.8; metric: -0.31 kg, -1.44 to 0.82); BMI WMD 0.11 kg/m2 (-0.33 to 0.56)
   Certainty: Juice and hesperidin capsules are combined.
   Clin Nutr ESPEN, 2021 · checked 2026-10-07 · we read the abstract
6. ev-fjw-06 · Randomized controlled trial(s) · randomized controlled trial · n = 78
   Both treatments had similar outcomes regarding body weight (-6.5 kg; P = 0.363), BMI (-2.5 kg/m2; P = 0.34), lean mass (-1 kg; P = 0.29), fat mass (-5 kg; P = 0.58), body fat (-3%; P = 0.15), and waist-to-hip ratio (-0.1; P = 0.79).
   
   Who: obese adults, mean age 36, BMI 33; reduced-calorie diet with or without 500 mL/d 100% orange juice
   Effect: body weight -14 lb (-6.5 kg) in both groups (P = 0.363); BMI -2.5 kg/m2
   Certainty: Juice within a calorie deficit; not blinded.
   Nutrition, 2017 · checked 2026-10-07 · we read the abstract
7. ev-fjw-07 · Randomized controlled trial(s) · randomized crossover intervention trial · n = 26
   Fecal microbiota, body weight, basal and OGTT-derived insulin sensitivity remained unchanged in both intervention periods.
   
   Who: healthy adults, mean age 24.7, BMI 23.2; orange juice or caffeine-free cola between 3 meals a day, ad libitum energy
   Effect: body weight unchanged in both 2-week periods
   Certainty: Only 2 weeks; small sample.
   Clin Nutr, 2019 · checked 2026-10-07 · we read the abstract
8. ev-fjw-08 · Meta-analysis or systematic review · systematic review and meta-analysis of randomized controlled trials · n = 3 RCTs, 252 participants
   The extract significantly reduced body weight (mean difference (MD) -2.08 kg; 95% confidence interval (CI) -3.50, -0.67; I2 = 0%; p < 0.01) and fat mass (MD -1.53 kg; 95% CI -2.92, -0.15; I2 = 0%; p = 0.03), the pooled analysis of waist circumference presented heterogeneous point estimates (MD -3.25 kg; 95% CI -6.44, -0.07; I2 = 99%; p = 0.05).
   
   Who: overweight and obese adults; Moro orange juice extract vs placebo
   Effect: body weight MD -4.6 lb (95% CI -7.7 to -1.5; metric: -2.08 kg, -3.50 to -0.67), I2 0%; fat mass MD -3.4 lb (-1.53 kg)
   Certainty: Extract supplement, not juice; only 3 RCTs.
   Nutr Health, 2026 · checked 2026-10-07 · we read the abstract
9. ev-fjw-09 · Observational data · scoping review of systematic reviews for Nordic Nutrition Recommendations 2023 · n = —
   The association between the intake of fruit juice and weight gain remains unclear and might be of concern for some groups of people.
   
   Who: systematic reviews and meta-analyses on fruit juice and health outcomes
   Effect: association with weight gain unclear; low to moderate intake not linked to chronic disease
   Certainty: Review of reviews without a pool.
   Food Nutr Res, 2024 · checked 2026-10-07 · we read the abstract
10. ev-fjw-10 · Position of an expert body · clinical report of a professional society · n = —
    High sugar content in juice contributes to increased calorie consumption and the risk of dental caries.
    
    Who: infants, children and adolescents
    Effect: more calories and dental caries risk; lack of protein and fiber may predispose to inappropriate weight gain
    Certainty: Position without its own pooled data.
    Pediatrics, 2017 · checked 2026-10-07 · we read the abstract
11. ev-fjw-11 · Position of an expert body · WHO guideline definition · n = —
    Free sugars include monosaccharides and disaccharides added to foods and beverages by the manufacturer, cook or consumer, and sugars naturally present in honey, syrups, fruit juices and fruit juice concentrates
    
    Who: adults and children
    Effect: fruit juice sugars classed as free sugars
    Certainty: A definition; the recommendation of <10% of energy is in another section.
    WHO, Guideline: sugars intake for adults and children, 2015 · checked 2026-10-07 · we read the section