Seven hours of sleep linked to lower diabetes risk, study finds

A large observational study of about 25,000 people (2009–2023) found that roughly seven hours and 18 minutes of nightly sleep was associated with the lowest insulin resistance, while both shorter and longer sleep linked to worse metabolic markers; weekend catch-up sleep did not offset deficits, and self-reported data limit causal conclusions. Experts say sleep is important for metabolic health but not a standalone solution, with guidance generally suggesting about 7–9 hours of regular, high‑quality sleep to help reduce diabetes risk.