Is Greek yogurt good for weight loss?

Nobody has tested it directly. We found no randomized trial and no systematic review of Greek yogurt itself with weight loss as the outcome. The best evidence nearby is about dairy in general. A meta-analysis of 27 randomized trials gave 2 to 4 servings of dairy a day inside a calorie-cut diet. Over a median of 16 weeks that meant 2.6 lb (1.16 kg) more weight loss (95% CI 0.66 to 1.66), in 644 adults who were 90 percent women. Without a calorie cut, more dairy did not reduce weight.

Unsettled. Greek yogurt is a high-protein dairy food, so it is reasonable to expect it to behave like other dairy inside a diet. That expectation has never been put to a trial of Greek yogurt with weight as the result. What we have is one-day appetite tests and trials of related foods.

What the trials found

Dairy in weight loss diets

The dairy trials split on one question: was everyone also cutting calories? Across 29 randomized trials in 2,101 adults, eating more dairy changed weight by -0.31 lb (95% CI -1.5 to 0.84; metric: -0.14 kg, -0.66 to 0.38), which is no real change, and the trials disagreed with each other a lot. Dairy reduced weight in trials with a calorie cut or lasting under a year. In trials where people ate freely, or that ran a year or longer, the effect went the other way. Both reviews pooled dairy in general, so they say nothing specific about Greek yogurt.

Greek yogurt as a snack: one-day tests

Fifteen healthy women took part in a crossover trial of afternoon yogurts. A 160 calories yogurt with 24 g of protein held off the request for dinner until 178 minutes, against 152 minutes for the same calories with 5 g of protein and 124 minutes with no snack. The women ate less at dinner after any yogurt, though not enough to cancel the 160 calories of the snack. That was one test day and no weight was measured.

Greek yogurt did not beat ordinary yogurt at equal calories. In a crossover trial of 32 healthy women, a 160 calories Greek-style yogurt with 14 g of protein and a regular yogurt with 5 g led to the same dinner, 709 calories against 686 calories, a difference that did not reach significance (p = 0.324). Hunger and fullness did not differ either.

The comparison matters. In a crossover trial of 20 healthy women, a 160 calories high-protein yogurt led to about 100 fewer calories at dinner than the same calories of chocolate and delayed eating by about 30 minutes. Against crackers the gap in dinner intake did not reach significance. The benefit was measured against a high-fat snack, and nobody tested it against eating nothing.

In children it did not carry over to the next meal. In a crossover trial of 40 children aged 9 to 14, a 180 calories Greek yogurt snack lowered appetite more than milk, yet food eaten two hours later did not differ between Greek yogurt, cheese, milk, chips and cookies (P = 0.15).

Longer trials of yogurt and of Greek yogurt

The only Greek yogurt trial longer than a day studied the wrong people for this question. In 30 lean, untrained young men on 12 weeks of resistance and jump training, those given plain fat-free Greek yogurt gained only fat-free mass and lost fat mass. The men given a carbohydrate pudding with the same calories gained both. Body fat percentage differed at the start and was adjusted statistically.

Two trials put yogurt inside a calorie-cut diet. In 34 adults with obesity on a diet 500 calories a day under their needs, the yogurt group lost 9.8 lb (4.43 kg) of fat against 6.1 lb (2.75 kg) on the control diet over 12 weeks. That trial used regular yogurt, and the yogurt group also ate far more calcium, so the effect cannot be pinned on yogurt. In 70 women with overweight or obesity on a low energy diet, adding 50 g a day of Kashk, a concentrated Iranian yogurt product, gave greater drops in BMI, body fat percentage and waist over 8 weeks. That trial was open label, and the abstract does not give the size of the drops.

The one review of yogurt and weight that includes trials found 6 randomized trials and one controlled trial, all small and short. Only one showed a significant effect on weight, and that was the trial confounded by calcium.

Yogurt eaters in observational studies

Observational data link yogurt to less weight gain. In three US cohorts of 120,877 adults, each extra daily serving of yogurt tracked with 0.82 lb less weight gain over 4 years. A meta-analysis of prospective cohorts linked each extra daily serving to about 41 g less weight gained a year (95% CI 34 to 48 g), with estimates that varied between studies. Across 9 observational studies of 47,778 adults, from a review made up mostly of cross-sectional studies, higher yogurt intake went with 21 percent lower odds of abdominal obesity (OR 0.79, 95% CI 0.70 to 0.89). Those are odds, and the studies report no absolute risk. None of these designs can show that yogurt caused the difference, because people who eat yogurt differ in other habits, and none looked at Greek yogurt separately.

Who should be careful

Not for everyone. Flavored yogurt is a different food for weight. A survey of 921 yogurts in UK supermarkets in 2016 found a median of 12.0 g of sugar per 3.5 oz (100 g) in flavored yogurts, against 5.0 g, mostly lactose, in natural and Greek yogurts. The lower figure describes plain pots, so a Greek yogurt with added fruit or flavor is worth checking on the label.

Fat content varies too. In the UK composition table, plain Greek style yogurt has 10.2 g of fat and 133 calories per 3.5 oz (100 g), a full-fat product unlike the nonfat strained yogurt sold under the same name in the United States.

Live-culture yogurt carries one rare risk in a very specific group. In one case, a toddler with intestinal failure and a central venous line developed a Lactobacillus bloodstream infection, and the isolate was about 99 percent similar to bacteria in the Greek yogurt he ate regularly. A single case cannot give a rate. It concerns people with a central line or severe immune suppression, and if that is you or your child, live-culture foods are worth raising with the care team.

We did not collect evidence on milk allergy or lactose for this page, so the absence of a warning here says nothing about those.

What expert bodies say

The EU did not authorize the claim that dairy foods, yogurt included, help weight loss as part of an energy restricted diet. It also did not authorize a claim that three portions of dairy a day help a healthy body weight in childhood and adolescence. Non-authorized means the evidence was not judged enough when the claim was assessed. It does not mean the effect was shown to be absent.

How we searched

What would change this answer

• A parallel randomized trial of plain Greek yogurt against a non-dairy food with the same calories, inside a weight loss diet, lasting at least 6 months, with body weight as the main outcome. None is registered on ClinicalTrials.gov.
• A trial comparing Greek yogurt with ordinary yogurt over months. The one head-to-head we have lasted one afternoon and found no difference.
• Trials in men. The calorie-cut dairy trials were 90 percent women, and the one Greek yogurt trial in men studied lean men building muscle.

What is in a pot of Greek yogurt, nutrient by nutrient, is on the Greek yogurt page.

Sources

1. ev-gywl-01 · Randomized controlled trial(s) · randomized crossover acute feeding trial · n = 15
   Specifically, dinner was requested at 124 ± 7 min following NS, 152 ± 7 min with LP, 158 ± 7 min following MP, and 178 ± 7 min post-snack for HP. Between snacks, HP led to the latest request time vs. LP (p<0.001) and MP (p<0.05). Although the energy content consumed at dinner was lower following the yogurt snacks vs. NS, the 160 kcal snacks were not fully compensated for at this meal.
   
   Who: fifteen healthy women, age 26 +/- 2 y; 160 calories afternoon yogurt snacks with 5, 14 or 24 g protein or no snack
   Effect: dinner requested at 124 +/- 7 min (no snack), 152 (low protein), 158 (moderate), 178 +/- 7 min (high protein); hunger lower and fullness higher after high vs low protein (p<0.05); snack calories not fully compensated at dinner
   Certainty: 3 days of acclimation plus one test day; appetite and one meal, no weight outcome
   Appetite, 2013 · checked 2026-10-06 · we read the abstract
2. ev-gywl-02 · Randomized controlled trial(s) · randomized crossover acute feeding trial · n = 32
   Ad libitum dinner intake was not different between the snacks (NP: 686 ± 33 kcal vs. HP: 709 ± 34 kcal; p = 0.324).
   
   Who: thirty-two healthy women, age 27 +/- 2 y, BMI 23.0; 160 calories snack with 5.0 g vs 14.0 g protein
   Effect: ad libitum dinner 686 +/- 33 calories (regular) vs 709 +/- 34 calories (Greek-style), p = 0.324; no difference in hunger or fullness
   Certainty: single test day; contradicts the idea that Greek yogurt beats regular yogurt for appetite at equal calories
   Nutr J, 2013 · checked 2026-10-06 · we read the abstract
3. ev-gywl-03 · Randomized controlled trial(s) · randomized crossover acute feeding trial · n = 20
   The yogurt snack also delayed eating initiation by approximately 30 min compared to the chocolate snack (p < 0.01) and approximately 20 min vs. crackers (p = 0.07). The yogurt snack led to approximately 100 fewer kcals consumed at dinner vs. the crackers (p = 0.08) and chocolate (p < 0.05).
   
   Who: twenty healthy women, age 27 +/- 2 y, BMI 23.4; 160 calories snacks: high-protein yogurt (14 g protein, 0 g fat), crackers or chocolate
   Effect: about 100 fewer calories at dinner vs chocolate (p<0.05) and vs crackers (p = 0.08); eating delayed about 30 min vs chocolate
   Certainty: one test meal per condition; benefit is versus high-fat snacks, not versus nothing
   Nutr J, 2014 · checked 2026-10-06 · we read the abstract
4. ev-gywl-04 · Randomized controlled trial(s) · randomized controlled trial, 12 weeks · n = 30
   That is, all body mass the GY group gained was FFM and they lost fat mass (100 and −26%, respectively), whereas the PP group gained both FFM and fat mass (76 and 24%, respectively).
   
   Who: thirty untrained university-aged males, 20.6 +/- 2.2 years; fat-free plain Greek yogurt (20 g protein per dose) or isoenergetic placebo pudding, 2-3 doses a day, resistance and plyometric training 3 days a week
   Effect: fat-free mass +2.4 +/- 1.5 vs +1.3 +/- 1.3 kg; % body fat -1.1 +/- 2.2 vs +0.1 +/- 2.6 (ANCOVA p = 0.048)
   Certainty: lean young men who were training, not people trying to lose weight; % body fat differed at baseline (adjusted by ANCOVA)
   Bridge A, et al. Greek Yogurt and 12 Weeks of Exercise Training on Strength, Muscle Thickness and Body Composition in Lean, Untrained, University-Aged Males. Front Nutr. 2019 · checked 2026-10-06 · we read the fulltext
5. ev-gywl-05 · 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); waist -3.99 +/- 0.48 vs -0.58 +/- 1.04 cm (P<0.001)
   Certainty: small; yogurt arm also differed in calcium intake, so the effect is confounded (noted by SR 26443336); calcium hypothesis later not confirmed by RCT meta-analyses; regular yogurt, not Greek
   Int J Obes (Lond), 2005 · checked 2026-10-06 · we read the abstract
6. ev-gywl-06 · Randomized controlled trial(s) · randomized controlled trial, 8 weeks, open label · n = 70
   Significantly greater reductions in body mass index (P = 0.018), fat percent (P = 0.037) and waist circumference (P = 0.047) were observed in the intervention group compared to control.
   
   Who: 70 women with overweight/obesity; low energy diet with or without 50 g Kashk (condensed processed yogurt) a day
   Effect: greater reductions in BMI (P = 0.018), fat percent (P = 0.037) and waist circumference (P = 0.047) vs control; effect sizes in kg not given in abstract
   Certainty: Kashk is a concentrated Iranian yogurt product, closer to Greek yogurt in protein than to plain yogurt; no placebo, not blinded
   Clin Nutr ESPEN, 2020 · checked 2026-10-06 · we read the abstract
7. ev-gywl-07 · 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 (-4.5 to -2; metric: -1.49 kg, -2.06 to -0.92); high-quality evidence
   Certainty: dairy in general, not Greek yogurt; effect only with calorie restriction
   Nutrients, 2016 · checked 2026-10-06 · we read the abstract
8. ev-gywl-08 · Meta-analysis or systematic review · meta-analysis of RCTs · n = 2,101
   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%; body fat -0.99 lb (-1.7 to -0.24; metric: -0.45 kg, -0.79 to -0.11)
   Certainty: dairy in general; adding yogurt without cutting calories is not expected to cause weight loss
   Am J Clin Nutr, 2012 · checked 2026-10-06 · we read the abstract
9. ev-gywl-09 · Observational data · systematic review (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 yogurt-specific weight review that includes trials; level set by the weakest-link evidence it rests on (observational)
   Int J Obes (Lond), 2016 · checked 2026-10-06 · we read the abstract
10. ev-gywl-10 · 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); highest vs lowest dairy and abdominal obesity OR 0.85 (0.76 to 0.95)
    Certainty: observational; heterogeneous estimates; yogurt eaters differ in other habits
    PLoS One, 2016 · checked 2026-10-06 · we read the abstract
11. ev-gywl-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 28 observational studies (6 cohort, 22 cross-sectional); yogurt pooled from 9 studies
    Effect: yogurt OR 0.79 (95% CI 0.70 to 0.89) for abdominal obesity; total dairy OR 0.84 (0.76 to 0.93)
    Certainty: mostly cross-sectional, so direction of cause unknown; odds, not risk
    Nutr Rev, 2026 · checked 2026-10-06 · we read the abstract
12. ev-gywl-12 · 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; any yogurt, not Greek; inverse-variance pooling of three cohorts
    N Engl J Med, 2011 · checked 2026-10-06 · we read the abstract
13. ev-gywl-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); flavored 12.0 (0.1 to 18.8); fruit 11.9 (4.6 to 21.3); 55% of low-fat yogurts had 10 to 20 g sugar/100 g
    Certainty: UK market 2016; shows why sweetened or flavored Greek-style products are a different food for weight than plain
    BMJ Open, 2018 · checked 2026-10-06 · we read the abstract
14. ev-gywl-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: one case; D pending Roman's decision on case series (K-143); applies only to people with a central catheter or severe immunosuppression
    Nutr Clin Pract, 2026 · checked 2026-10-06 · we read the abstract
15. ev-gywl-15 · Randomized controlled trial(s) · randomized repeated-measures crossover · n = 40
    FI did not differ between snacks (P = 0.15). The Greek yogurt (P < 0.0001) and cheese (P = 0.0009) snacks reduced average appetite compared with the 2% fat milk snack.
    
    Who: 40 children aged 9-14 years; isoenergetic 180 calories snacks: potato chips, cookies, cheese, Greek yogurt, 2% milk
    Effect: food intake 120 min later did not differ between snacks (P = 0.15); Greek yogurt reduced average appetite vs milk (P<0.0001)
    Certainty: one session per snack; children, no weight outcome
    Appl Physiol Nutr Metab, 2021 · checked 2026-10-06 · we read the abstract
16. ev-gywl-16 · 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 2026-10-06 · we read the dataset
17. grky-r3-13 · Position of an expert body · regulatory decision · n = —
    POL-HC-6305 Dairy products (milk, cheese and yoghurt) Three portions of dairy food everyday, as part of a balanced diet, may help promote a healthy body weight during childhood and adolescence. -/- Non-authorised
    
    Who: EU Register on nutrition and health claims, substance Dairy products (milk, cheese and yogurt)
    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-6305, snapshot 2026-09-21 · checked 2026-09-29 · we read the dataset
18. grky-r3-17 · Position of an expert body · reference dataset, not a study · n = —
    Yogurt, Greek style, plain | CoFID 12-555 | Protein 5.7 g | Fat 10.2 g | Carbohydrate 4.8 g | Lactose 3.5 g | Energy 133 kcal | Calcium 126 mg
    
    Who: CoFID 2021, Yogurt, Greek style, plain, code 12-555
    Effect: per 3.5 oz (100 g): protein 5.7 g, fat 10.2 g, carbohydrate 4.8 g, lactose 3.5 g, energy 133 calories, calcium 126 mg
    Certainty: "Greek style" in the British table ≠ American nonfat strained (in FNDDS/USDA about 10 g protein): the USDA↔CoFID pair is automatic (K-57), the numbers are about different products
    CoFID 2021, Public Health England, code 12-555 (OGL v3.0) · checked 2026-09-29 · we read the dataset