6 Alarming Effects of Sleeping Less Than 7 Hours a Night, According to Recent Studies

Simba’s AI analysis of more than 2,000 adults turned vague complaints into a brutal visual reality: sleep loss etches itself onto the body. When nights are short, cortisol surges, fueling inflammation that worsens eczema, psoriasis, redness, and itching. Reduced blood flow robs the skin of its glow, leaving it dull and sallow. Nails grow brittle as the body’s overnight repair window shrinks. Inside, hunger hormones spiral out of balance: ghrelin rises, leptin falls, and suddenly you’re ravenous for sugar while your sense of fullness fades.