Human hairs sprout from follicles, which contain stem cells that are sensitive to dietary changes (artificially coloured).Credit: Dr Keith Wheeler/SPL
A popular weight-loss regimen stunts hair growth, data collected from mice and humans suggest1. The study’s findings show that intermittent fasting, which involves short bouts of food deprivation, triggers a stress response that can inhibit or even kill hair-follicle stem cells, which give rise to hair.
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