09 Jun 2022 --- Muscle stem cells have proven to be more resilient to stress when fasting or following a ketogenic diet, a mouse study published in Cell Metabolism reveals. In the analysis, muscle stem cells appeared to enter a deep resting state. While fasting was found to make muscle stem cells more resilient to stress – nutrient deprivation, cell-damaging chemical exposure and radiation – it was found to slow down the process of injury repair.