Mixed
A plant-based caloric restriction diet (PB-CRD) using a '5+2' structured meal plan is non-inferior to conventional calorie-restricted diets (CRD) for weight loss in obese adults, while providing superior reductions in total body fat percentage and improvements in metabolic markers including insulin sensitivity, uric acid, and liver enzymes.
To lose weight and improve metabolic health, you can follow a structured plant-based diet that restricts calories to 1,300-1,600 kcal/day. You do not need to be vegan 7 days a week; eating standardized plant-based meals for 5 days and allowing flexible, calorie-controlled meals for 2 days is effective. This approach matches the weight loss of traditional calorie restriction but offers better improvements in body fat percentage, insulin sensitivity, and liver health.
Both groups achieved significant within-group weight loss from baseline (p < 0.05): 5.11 kg in the CRD and 6.56 kg in the PB-CRD group. The between-group difference was −1.44 kg (95% confidence interval [CI]: −3.27 to 0.39), which remained within the pre-specified non-inferiority margin of 0.5 kg. Compared to the CRD, the PB-CRD group demonstrated significantly greater between-group reductions in total body fat percentage (2.96 [95% CI: 1.67–4.25], p = 0.028), uric acid, and superoxide dismutase levels... Additionally, the PB-CRD group exhibited significant within-group improvements in visceral fat mass, HOMA-IR, total cholesterol, liver function markers, and inflammatory markers (p < 0.05)
Why this rating
Randomized controlled trial with non-inferiority design, but limited by high dropout rate (35%), single-center design, and short duration (12 weeks).
Source
Plant-based caloric restriction diets versus conventional calorie-restricted diets for weight loss and metabolic health in obese adults: a 12-week randomized, open-label, non-inferiority trial
Kelibinuer Mutailipu et al. · Frontiers in Nutrition · 2026
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