Metabolic syndrome has been a growing problem in recent decades in both adult and pediatric populations. Time-restricted feeding (TRF), has been shown to attenuate metabolic disorders and obesity in adults. It is thought to be superior to surgical interventions and other dietary patterns as it is non-invasive, and does not lead to unbearable hunger. However, there is a lack of data on its effects in pediatric populations. n this episode, we meet Dr. Dandan Hu, who during her time at Peking Union Medical College Hospital, carried out an experiment using a paediatric mouse model to assess the effects of TRM on their metabolism and microbiota. The results were unexpected.