Biology Insights

From synthetic opioids to OTC medications, learn which drugs are most commonly involved in overdoses and how these trends have shifted in recent years.

A red patch on your eye can look alarming, but subconjunctival hemorrhage is usually harmless. Learn what causes it and how long it takes to clear up.

From diet and exercise to medications, here's what actually works to bring high blood pressure down and keep it there.

Itching can be a symptom of inflammatory breast cancer, but it's rarely the main one. Learn which skin changes actually signal IBC and when to see a doctor.

Masturbation is generally safe and even beneficial for most people. Here's what the science says about its effects on your body, mind, and relationships.

Where your stomach hurts can point to very different causes. Learn what pain location suggests and which symptoms need prompt medical attention.

From sugary drinks to hidden carbs, learn which foods raise blood sugar and how to make smarter everyday choices if you have diabetes.

Jock itch is more common than most people realize. Learn who gets it, how to recognize it, and how to treat and prevent it from returning.

Science classifies alcoholism as a brain disorder with genetic roots, physical dependence, and psychological components — and effective treatments exist.

Learn what triggers heart palpitations, how to calm them quickly, and which symptoms mean it's time to call your doctor.

Oatmeal has real health benefits, but the type you choose matters. Here's what the science says about cholesterol, blood sugar, and more.

An itchy scalp can stem from dandruff, dry skin, lice, or nerve issues. Learn what's behind your itch and how to find relief.

Ham is high in sodium and linked to heart risks, but occasional portions can fit a balanced diet. Here's what the research says.

Learn how blood clots form, what symptoms to watch for, who's most at risk, and how they're treated and prevented.

Hyperthyroidism can be a disease or a condition depending on its cause. Learn what excess thyroid hormone does, how it's diagnosed, and how treatment varies.

Four STIs—chlamydia, gonorrhea, syphilis, and trichomoniasis—can be fully cured with the right treatment. Here's what you need to know.

From single-dose prescriptions to 3-day OTC creams, here's what actually works for a yeast infection and what's better left on the shelf.

Red eyes can mean anything from mild allergies to a medical emergency. Learn what's actually causing yours and when it's time to see a doctor.

Vegenaise and mayo have more in common than you'd think. Here's what actually differs between them and when switching might be worth it.