The effects of a 6-week controlled hypocaloric ketogenic diet with and without exogenous ketone salts on cognitive performance and mood states in overweight and obese adults

Randomized trial in 37 overweight and obese adults on hypocaloric diets: ketogenic diet plus ketone salts (Metagenics), ketogenic diet plus placebo, or low-fat diet. At week 2 the placebo keto group had higher depression scores than the ketone salt group. Math processing and go/no-go performance were lower in comparison groups than in the ketone salt group.