ScienceInsights

Ashwagandha can cause side effects ranging from mild digestive upset to rare liver injury. Here's what the evidence says about who's most at risk.

Mosquito bites itch due to your immune response. Here are the remedies—from ice to antihistamines—that actually ease the itch.

Once plaque hardens into calculus, brushing won't remove it. Learn why professional cleaning is the only safe option and how to slow buildup between visits.

Period cramps come down to prostaglandins and uterine contractions. Here's what's actually happening in your body and why some months hurt more than others.

Learn what your bone density test results actually mean, from T-scores to fracture risk, and what the scan can and can't tell you about your bone health.

Medicare can cover Mounjaro for type 2 diabetes, but costs and eligibility vary by plan. Here's what to expect and how to check your coverage.

Constant headaches have real causes, from tension and migraines to medication overuse. Learn what might be behind yours and when to see a doctor.

Find out when pregnancy tests can actually detect hCG, why timing matters, and how to avoid a false negative result.

Dementia has several causes, from Alzheimer's to vascular damage. Learn what drives cognitive decline and which risk factors you can actually influence.

From numbing gels to honey, here's what actually helps canker sores heal faster — and a few things you should keep away from them.