Does yogurt help with weight loss?

A little, and only if you are already eating fewer calories. We found no meta-analysis of randomized trials of yogurt itself for weight. The closest is about dairy in general. In 27 randomized trials, 2 to 4 servings of dairy a day, or whey protein, inside a calorie-cut diet gave 2.6 lb (1.16 kg) more weight loss over a median of 16 weeks (95% CI 0.66 to 1.66), in 644 adults who were 90 percent women. Across 29 trials with 2101 adults, more dairy without that condition did not reduce weight.

Unsettled. People who eat yogurt gain less weight over the years, in large cohort studies. Whether yogurt causes that is not known. The trials of yogurt itself are small and short, and the one that found a clear effect also gave its yogurt group more calcium.

What the trials found

Dairy in general

The 27-trial meta-analysis above also found 3.3 lb (1.49 kg) more fat lost (95% CI 0.92 to 2.06), and its reviewers rated the evidence high quality. Some of those trials used dairy foods and some used 20 to 84 g of whey protein a day, and the women in them made up 90 percent of the people counted. The 29-trial meta-analysis is the warning that goes with it. Overall the change was -0.31 lb (95% CI -1.5 to 0.84; metric: -0.14 kg, -0.66 to 0.38), with large variation between trials. More dairy lowered weight in trials with a calorie cut or under a year long. In trials where people ate freely, or that lasted a year or more, it had the opposite effect.

Myth. Adding yogurt to an unchanged diet is not a way to lose weight. In the randomized trials of dairy, eating more of it without cutting calories did not reduce weight, and in the longer trials it went the other way.

Yogurt itself

In a 12-week randomized trial, 34 adults with obesity ate 500 calories a day less than they needed. The 18 who ate yogurt lost 9.8 lb (4.43 kg) of fat against 6.1 lb (2.75 kg) in the 16 on the control diet, and lost 31 per cent less lean tissue. The yogurt group took in 1100 mg of calcium a day against 400 to 500 mg on the control diet. A later systematic review of 22 yogurt studies noted that this was the one trial with a significant effect on weight loss, and that the calcium difference confounds it. The other trials in that review had limitations including small size and short duration.

Two newer trials compared a yogurt with added microbes against plain yogurt, so they test the microbes rather than yogurt. In 44 adults with metabolic syndrome, 300 g a day of a synbiotic yogurt for 12 weeks lowered waist-to-hip ratio more than regular yogurt (p = 0.02). The abstract does not report body weight. In 66 people with overweight or obesity, a yogurt fortified with an Akkermansia postbiotic cut waist size and body fat percentage over 8 weeks against low-fat yogurt. A version with Lactobacillus rhamnosus showed no benefit. Neither abstract gives the size of the differences.

The link, in observational data

In three US cohorts of 120,877 adults who were not obese at the start, each extra daily serving of yogurt went with 0.82 lb less weight gain over 4 years. A meta-analysis of prospective cohorts put it at about 41 g less gain a year per serving (95% CI 33.88 to 48.09 g). A dose-response meta-analysis of cohorts linked each extra 50 g a day to a 13 percent lower risk of overweight or obesity. A review of 10 prospective cohorts found the same direction, with many of the estimates not statistically significant.

The same signal does not show up in children. A meta-analysis of cross-sectional and cohort studies in children and adolescents found no link between yogurt and how common obesity was. People who choose yogurt also tend to differ in other habits, which is why these studies show a link and not a cause.

Who should be careful

Which yogurt matters more for weight than whether it is yogurt. A survey of 921 yogurts in UK supermarkets in 2016 found natural and Greek yogurts had about 5.0 g of sugar per 3.5 oz (100 g), mostly lactose, the sugar milk carries anyway. Low-fat yogurts had less sugar than full-fat ones, and still 55 percent of them, 285 of 518, held 10 to 20 g per 3.5 oz (100 g). A low-fat label does not tell you how much sugar is in the pot.

Not for everyone. Live cultures are not harmless for everyone. In one case report, a toddler with intestinal failure and a central venous line developed a Lactobacillus bloodstream infection, and the bacteria were about 99 percent similar to those in the Greek yogurt he ate regularly. That is a single case in a child with a catheter. If you or your child has a central line or severely weakened immunity, ask the treating team about live-culture foods.

We have no card on yogurt for weight loss in pregnancy or alongside medicines. That is a gap in what we found, not a sign of safety.

What expert bodies say

The European Union considered the claim that dairy foods, including yogurt, help weight loss as part of an energy-restricted diet, and did not authorize it. A refusal like this means the evidence did not meet the bar when it was assessed. It is not a finding that dairy has no effect. We found no other agency position on yogurt and weight.

How we searched

What would change this answer

• A randomized trial of plain yogurt against a matched food with the same calcium and calories, with weight as the main outcome and at least a year of follow-up. We found none, in print or registered.
• A meta-analysis of yogurt trials alone. The dairy meta-analyses mix milk, cheese, yogurt and whey, so they cannot say what yogurt adds.
• Trials of sweetened yogurt as people actually buy it. The cohort signal comes from yogurt as eaten, and the pots on the shelf run from about 5 g of sugar per 3.5 oz (100 g) in plain ones to 10 to 20 g in many low-fat ones.

What a serving of yogurt holds, and how plain and flavored kinds compare, is on the yogurt page.

Sources

1. ev-yowl-01 · Meta-analysis or systematic review · systematic review and meta-analysis of RCTs · n = 644
   27 RCTs were reviewed. Participants consumed between 2 and 4 standard servings/day of dairy food or 20-84 g/day of whey protein compared to low dairy control diets, over a median of 16 weeks. A greater reduction in body weight (-1.16 kg [-1.66, -0.66 kg], p < 0.001, I² = 11%, QR = high, n = 644) and body fat mass (-1.49 kg [-2.06, -0.92 kg], p < 0.001, I² = 21%, n = 521, QR = high) were found in studies largely including women (90% women).
   
   Who: adults on energy-restricted diets, studies largely in women (90%); dairy foods or 20-84 g whey a day
   Effect: body weight -2.6 lb (95% CI -3.7 to -1.5; metric: -1.16 kg, -1.66 to -0.66); fat mass -3.3 lb (95% CI -4.5 to -2; metric: -1.49 kg, -2.06 to -0.92); high-quality evidence
   Certainty: Dairy in general, not only yogurt; effect only in a calorie deficit.
   Nutrients, 2016 · checked 2026-10-07 · we read the abstract
2. ev-yowl-02 · Meta-analysis or systematic review · meta-analysis of RCTs · n = 2101
   Twenty-nine RCTs were included with a total of 2101 participants. Overall, consumption of dairy products did not result in a significant reduction in weight (-0.14 kg; 95% CI: -0.66, 0.38 kg; I² = 86.3%). In subgroup analysis, consumption of dairy products reduced body weight in the context of energy restriction or short-term intervention (<1 y) trials but had the opposite effect in ad libitum dietary interventions or long-term trials (≥1 y).
   
   Who: adults in randomized trials of increased dairy consumption
   Effect: body weight -0.31 lb (95% CI -1.5 to 0.84; metric: -0.14 kg, -0.66 to 0.38), I2 86.3%; loss only with energy restriction or <1 year
   Certainty: Adding yogurt without cutting calories: do not expect weight loss.
   Am J Clin Nutr, 2012 · checked 2026-10-07 · we read the abstract
3. ev-yowl-03 · Randomized controlled trial(s) · randomized controlled trial, 12 weeks · n = 34
   Fat loss was markedly increased on the yogurt diet (-4.43+/-0.47 vs -2.75+/-0.73 kg in yogurt and control groups; P<0.005) while lean tissue loss was reduced by 31% on the yogurt diet.
   
   Who: obese subjects on a -500 calories/day balanced deficit diet; control (400-500 mg Ca/day, n = 16) or yogurt (1100 mg Ca/day, n = 18)
   Effect: fat loss -4.43 +/- 0.47 vs -2.75 +/- 0.73 kg (P<0.005); lean tissue loss 31% lower
   Certainty: Small RCT; the yogurt group also differed in calcium (confounder, see ev-yowl-06).
   Int J Obes (Lond), 2005 · checked 2026-10-07 · we read the abstract
4. ev-yowl-04 · Randomized controlled trial(s) · randomized controlled clinical trial, 12 weeks, control group ate regular yogurt · n = 44
   Daily consumption of synbiotic yogurt containing L. plantarum, L. pentosus, and C. marcosianos yeast in adults with MetS caused a significant decrease in the levels of fasting blood glucose (FBG) (p = 0.005), fasting insulin (p = 0.001), homeostatic model assessment for insulin resistance (HOMA-IR) index (p < 0.001), waist to hip ratio (WHR) (p = 0.02) and systolic blood pressure (p = 0.008) in the intervention group compared to the control group.
   
   Who: adults with metabolic syndrome
   Effect: waist to hip ratio p = 0.02 vs regular yogurt; fasting glucose p = 0.005, HOMA-IR p < 0.001; body weight change not reported in abstract
   Certainty: Control was regular yogurt, so this is about strains, not yogurt as such. Weight is not named in the abstract.
   Nutr Diabetes, 2024 · checked 2026-10-07 · we read the abstract
5. ev-yowl-05 · Randomized controlled trial(s) · randomized double-blinded clinical trial, 8 weeks · n = 66
   However, the results indicated that Lactobacillus rhamnosus-fortified yogurt did not demonstrate any beneficial impact on the health parameters.
   
   Who: people with overweight and obesity, three groups of 22
   Effect: waist circumference P = 0.003, body fat percentage P = 0.032 vs low-fat yogurt; L. rhamnosus yogurt no benefit
   Certainty: Again a strain versus plain yogurt; the abstract does not give absolute differences.
   Clin Nutr ESPEN, 2025 · checked 2026-10-07 · we read the abstract
6. ev-yowl-06 · Observational data · systematic review of observational studies and trials, no pooling · n = 22 publications
   Six randomised controlled trials (RCTs) and one controlled trial had various limitations, including small size and short duration. One RCT showed significant effects of yoghurt on weight loss, but was confounded by differences in calcium intake.
   
   Who: apparently healthy adults; 6 cohort, 7 cross-sectional studies, 6 RCTs and 1 controlled trial
   Effect: observational studies all showed lower or improved body weight or composition; 5 of 6 trials showed nonsignificant greater weight losses with yogurt
   Certainty: The only review specifically on yogurt and weight that includes RCTs; not pooled.
   Int J Obes (Lond), 2016 · checked 2026-10-07 · we read the abstract
7. ev-yowl-07 · Observational data · systematic review of prospective cohort studies · n = 10 cohort studies
   Prospective cohort studies consistently suggested that yogurt consumption may contribute to a reduction in adiposity indexes and the risk of metabolic syndrome.
   
   Who: adults in prospective cohort studies of yogurt consumption
   Effect: inverse point estimates in all but one study; risk of overweight or obesity not consistently significant; no pooling
   Certainty: The authors ask for high-quality RCTs; association, not cause.
   Adv Nutr, 2017 · checked 2026-10-07 · we read the abstract
8. ev-yowl-08 · Observational data · meta-analysis of prospective cohort studies · n = 22 studies
   However, there was inverse association between changes in body weight for each serving's increase of yogurt (beta: -40.99 gram/year, 95% CI, -48.09 to -33.88), whereas each serving's increase of cheese was positively associated (beta: -10.97 gram/year, 95% CI, 2.86 to 19.07).
   
   Who: prospective cohort studies of dairy intake and change in body weight or waist
   Effect: beta -40.99 g/year per serving of yogurt (95% CI -48.09 to -33.88)
   Certainty: Observational data; people who eat yogurt differ in other habits.
   PLoS One, 2016 · checked 2026-10-07 · we read the abstract
9. ev-yowl-09 · Observational data · dose-response meta-analysis of cohort studies · n = 42 articles
   The risk decreased by 25%, 7%, and 12% per 200-g/d increase for total dairy, high-fat dairy, and milk, respectively, and by 13% per 50-g/d increment of yogurt.
   
   Who: adults in cohort studies reporting dairy intake at 3 or more levels
   Effect: overweight or obesity risk -13% per 50 g/day yogurt; -25% per 200 g/day total dairy; linear association
   Certainty: Cohorts; RR in the abstract without CI for yogurt.
   Adv Nutr, 2022 · checked 2026-10-07 · we read the abstract
10. ev-yowl-10 · Observational data · pooled prospective cohorts · n = 120,877
    On the basis of increased daily servings of individual dietary components, 4-year weight change was most strongly associated with the intake of potato chips (1.69 lb), potatoes (1.28 lb), sugar-sweetened beverages (1.00 lb), unprocessed red meats (0.95 lb), and processed meats (0.93 lb) and was inversely associated with the intake of vegetables (-0.22 lb), whole grains (-0.37 lb), fruits (-0.49 lb), nuts (-0.57 lb), and yogurt (-0.82 lb) (P≤0.005 for each comparison).
    
    Who: US women and men free of chronic disease and not obese at baseline (Nurses' Health Study, NHS II, Health Professionals Follow-up Study)
    Effect: -0.82 lb per 4 years per increased daily serving of yogurt (P<=0.005); potato chips +1.69 lb
    Certainty: Observational data, three cohorts.
    N Engl J Med, 2011 · checked 2026-10-07 · we read the abstract
11. ev-yowl-11 · Observational data · systematic review and meta-analysis of observational studies · n = 47,778
    Pooling effect sizes from 9 eligible studies with 47 778 participants showed that higher amounts of yogurt consumption was related to a 21% reduction in abdominal obesity (OR = 0.79; 95% CI, 0.70-0.89).
    
    Who: adults in observational studies; yogurt pooled from 9 studies
    Effect: yogurt OR 0.79 (95% CI 0.70 to 0.89) for abdominal obesity
    Certainty: Mostly cross-sectional studies; OR is odds, not risk.
    Nutr Rev, 2026 · checked 2026-10-07 · we read the abstract
12. ev-yowl-12 · Observational data · systematic review and meta-analysis of cross-sectional and prospective cohort studies · n = —
    No significant associations were found between milk or yogurt and obesity prevalence risk.
    
    Who: children and adolescents in cross-sectional and prospective cohort studies
    Effect: yogurt and obesity prevalence: no significant association; total dairy OR 0.66 (95% CI 0.48 to 0.91) cross-sectional only
    Certainty: In children there is no "yogurt" signal.
    Obes Rev, 2022 · checked 2026-10-07 · we read the abstract
13. ev-yowl-13 · Observational data · cross-sectional product survey · n = 921 products
    Natural/Greek yogurts had dramatically lower sugar contents (5.0 g/100 g (1.6, 9.5), largely lactose) than all other categories. While low-fat (<3 g/100 g) products had less sugar and energy than higher fat yogurts, nonetheless 55% (285 of 518 low-fat yogurts) contained between 10 and 20 g sugar/100 g.
    
    Who: 921 yogurt products in five major UK online supermarkets, November 2016
    Effect: natural/Greek 5.0 g/100 g (1.6 to 9.5), largely lactose; 285 of 518 low-fat yogurts 10 to 20 g/100 g
    Certainty: UK market 2016; sweetened yogurt is a different food for weight than plain.
    BMJ Open, 2018 · checked 2026-10-07 · we read the abstract
14. ev-yowl-14 · Laboratory or animal data · case report · n = 1
    Comparative genetic analysis predicted ~99% similarity between the CLABSI isolate and Lactobacillus isolates from the Greek yogurt the patient regularly consumed. Our patient's Lactobacillus CLABSI was linked to the consumption of Greek yogurt.
    
    Who: one toddler with intestinal failure and a central venous catheter
    Effect: blood isolate about 99% similar to Lactobacillus from the Greek yogurt consumed
    Certainty: A single case; applies only to people with a central catheter or severe immunosuppression.
    Nutr Clin Pract, 2026 · checked 2026-10-07 · we read the abstract
15. ev-yowl-15 · Position of an expert body · regulatory decision · n = —
    POL-HC-7009 Dairy (low fat dairy) *Dairy refers to cow’s milk, yogurt and cheese Dairy in an energy restricted diet helps weight loss. Consuming dairy foods, as part of your weight loss diet, will help weight loss. Consuming dairy foods, as part of your weight loss diet, will help weight maintenance. Non-authorised
    
    Who: EU Register on nutrition and health claims, substance Dairy (low fat dairy): cow's milk, yogurt and cheese
    Effect: non-authorized claim
    Certainty: "Non-authorized" = evidence was insufficient at the time of assessment, not "no effect".
    EU Register on nutrition and health claims, claim POL-HC-7009, snapshot 2026-09-21 · checked 2026-10-07 · we read the dataset