Biology Insights

Anal sex carries a higher HIV risk than other sexual activities due to thin rectal tissue, immune cell density, and micro-tears — but prevention tools work well.

Learn the early signs of diabetes, how blood tests work, and when to get screened—including what prediabetes means for your health.

A state-by-state look at where late-term abortions are legal, how medical exceptions work, and how common these procedures actually are.

Bunions won't reverse without surgery, but the right shoes, exercises, and padding can ease pain and slow progression at home.

CBD gummies may help with sleep, pain, and anxiety, but the evidence varies. Here's what the science actually says about their benefits and limitations.

Creatine has real side effects worth knowing, from digestive issues to water retention, but some common concerns like kidney damage are largely unfounded.

Skin biopsies can detect far more than cancer, including infections, autoimmune conditions, and signs of internal disease. Here's what a small skin sample can reveal.

A late period can have many causes beyond pregnancy, from stress and thyroid issues to PCOS. Here's how to figure out what's going on.

A BMI of 23 sits comfortably in the healthy range, but what that means for you depends on your age, ethnicity, and other health markers.

Newborn feeding amounts change quickly in the early weeks. Here's what to expect, from those first tiny feeds to steady growth.

LaCroix won't harm your kidneys. Learn why sparkling water differs from soda and what the research actually shows about kidney health.

A practical guide to low carb foods across every food group, including what to watch out for when hidden carbs sneak into everyday ingredients.

Higher earners pay more for Medicare Part B through IRMAA. Learn how income thresholds work, what counts, and how to appeal if your situation has changed.

Binge drinking starts at 4 drinks for women and 5 for men, but age and drink size matter too. Here's what the threshold means for your health.

Practical ways to lower blood sugar through food timing, exercise, sleep, hydration, and stress management — plus the target numbers to aim for.

From NSAIDs to heat therapy, here's what research says actually relieves period pain and when to talk to a doctor.

Leg cramps have several possible causes, from aging and exercise to medications. Learn what science says actually helps prevent and relieve them.

Curious how your baby's length compares? Learn typical measurements from birth through month 12 and what growth percentiles actually mean for your child.

VapoRub doesn't actually open your airways — it tricks your brain into feeling like it does. Here's what the science really says about how it works.