Biology Insights

Learn how much a 4-month-old typically eats, whether breastfed or formula-fed, and how to know your baby is getting enough.

From prep to recovery, here's a clear look at what getting a vasectomy actually involves, including what changes, what doesn't, and how well it works.

Brown period blood is usually just older blood that took longer to leave your body. Learn what's normal and when it's worth checking with a doctor.

Epilepsy is more than seizures. Learn what it means to live with the condition, how it affects the brain, and what to do if someone has a seizure.

Afrin side effects like rebound congestion can linger for days after you stop. Here's what to expect and how long recovery typically takes.

Pregnancy weight gain varies by your starting BMI and whether you're carrying twins. Learn what's typical, where the pounds go, and why it matters for you and your baby.

Most foot blisters heal best when left alone, but here's when draining is safe, how to care for them, and signs of infection to watch for.

125 mcg (5,000 IU) of Vitamin D3 exceeds standard guidelines but may be appropriate for some. Here's what the research says about safety and blood levels.

Menopause affects far more than periods. Learn how shifting hormones reshape your heart, bones, brain, sleep, and more.

Losing more hair than usual? Learn how to tell the difference between normal shedding and actual hair loss, and what signs are worth seeing a doctor about.

Practical ways to relieve constipation quickly, from toilet posture and abdominal massage to drinks and OTC options that actually work.

Make your own electrolyte drink at home with simple ingredients that rival store-bought options like Liquid IV—here's what actually works.

Learn the safest ways to dispose of old medications at home, from the trash method to take-back programs, including what to flush and what to avoid.

Practical steps for managing depression, from recognizing symptoms to finding therapy, medication, and building routines that support recovery.

Type 2 diabetes develops through a mix of insulin resistance, genetics, and lifestyle factors. Learn how these pieces fit together in your body.

Learn how rheumatoid arthritis symptoms feel, how they differ from osteoarthritis, and what signs to watch for beyond joint pain.

A look at what's actually in the newborn vitamin K shot, why babies need it, and how the injection compares to oral drops.

Learn about how to make my period come fast — what the research says and what you need to know.