Bryan Johnson says, ‘a single night of 4 hour sleep can drop insulin sensitivity by 25%’, suggests ways to prioritise it for longevity
Published on: Oct. 27, 2025, 3:28 p.m. | Source: The Indian Express
Longevity researcher Bryan Johnson warns that one night of 4-hour sleep can drop insulin sensitivity by 25%. Endocrinologist Dr. Himika Chawla confirms this link, explaining how sleep deprivation spikes cortisol and urges you to prioritize 7.5+ hours, finish dinner 4 hours before bed, and avoid caffeine to protect metabolic health and prevent prediabetes.
