A Nutritional and Pharmacological Intervention for Body, Brain, and Longevity Effects (NIBBLE) - A Randomized Open-label Intervention of the Fasting-mimicking Diet (FMD) and Rapamycin (NIBBLE)

The study aims to evaluate the safety, feasibility, and preliminary efficacy of the fasting-mimicking diet (FMD) or low-dose daily mTOR(definition)-inhibiting drug studied for extending healthspan and lifespan." style="text-decoration:underline dotted; text-underline-offset:2px; cursor:help;">rapamycin(definition) treatment relative to a matched placebo control group when administered over 8 weeks in middle-aged adults at elevated risk for Alzheimer's disease due to the apolipoprotein (APOE) ε4 allele. Participants randomly assigned to the FMD intervention will adhere to FMD for 5-days over three cycles for a period of approximately 8 weeks. Participants randomly assigned to the rapamycin and placebo groups will take 1 mg of rapamycin or a matched placebo pill daily for approximately 8 weeks.