In this 8-week randomized, double-blind, placebo-controlled trial, 51 overweight and obese adults took racemic beta-hydroxybutyrate (BHB) mineral salts or placebo (maltodextrin) twice daily alongside modest caloric restriction. Body mass fell in both groups. Within the BHB group, fat mass decreased by 2 kg (p < 0.05 versus baseline), body fat percentage improved, and LDL cholesterol fell, with no such body composition changes in the placebo group. Group by time interactions for body composition were not significant, lean mass was largely preserved, and resting metabolic rate did not decline.
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