A comprehensive genomic study conducted by the Buck Institute for Research on Aging has revealed that 16:8 intermittent fasting — eating within an 8-hour window and fasting for 16 hours — activates 47 genes strongly associated with cellular repair, reduced inflammation, and extended lifespan. The study tracked 890 participants aged 40 to 70 over 12 months.
Among the most significant activated pathways were autophagy genes responsible for clearing damaged cellular components, SIRT1 and SIRT3 longevity genes, and multiple anti-inflammatory regulators. Participants also showed measurable reductions in IGF-1 and mTOR signaling — two pathways consistently linked to accelerated aging when chronically elevated.
Crucially, the benefits were observed regardless of whether participants lost weight during the study period, suggesting the fasting pattern itself — not caloric restriction — is the active ingredient. Researchers noted that time-restricted eating appears to act as a systems-level reset for metabolic and genomic aging processes.