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Mental illness is an epidemic touching most Americans, whether directly or through a loved one. More than one in five adults suffers from mental illness. Even more concerning, one in every seven youth ages 6 to 17 suffers from a mental health disorder

I asked sleep experts – plus a dermatologist and ophthalmologist – to answer this question and more

Home Gut Microbiome Tests Give Varying Results June 24, 2026 By:Stephanie Servetas Stephanie Servetas is a microbiologist at NIST who studies the gut microbiome. Credit: Megan King/NIST