Olga Pivovarova-Ramich

At a glance

• Leads research on molecular metabolism and precision nutrition at the German Institute of Human Nutrition (DIfE) in Potsdam-Rehbrücke.
• Studies chrononutrition: how the timing and composition of meals affect the body clock and metabolism.
• Led the ChronoFast trial in women with overweight: eating early or late within a restricted window at equal calorie intake. The window shifted clocks in fat tissue but did not improve cardiometabolic health (Science Translational Medicine, 2025).
• An analysis from the same trial did find better actigraphy-estimated sleep quality with early, but not late, eating (2026).
• Other work shows that the composition of morning and afternoon meals reshapes the daily rhythm of genes in fat tissue.
• Relevant because time-restricted eating is heavily hyped: these studies suggest the benefit runs mainly through eating fewer calories, while timing matters mostly for the clock and sleep.