Biology Insights

Learn how soluble fiber works, which foods contain the most, and how much you need to support heart health, blood sugar, and digestion.

Swollen legs can often be eased with elevation, compression, and less sodium, but one-sided swelling may signal something more serious.

Pink discharge can have many causes, from ovulation and early pregnancy to infections or hormonal shifts. Here's what might be behind it.

Night sweats are often harmless, but some causes need attention. Learn what's behind nighttime sweating and when it's worth talking to a doctor.

Find practical home remedies for stomach pain, from easing acid reflux and gas to managing a stomach virus, plus signs it's time to see a doctor.

Nicotine withdrawal is tough, but manageable. Learn which therapies, medications, and habits are backed by evidence to help you quit more comfortably.

Sleep training helps babies learn to fall asleep on their own. Here's what the science says about how it works and which methods might suit your family.

Sugar cravings aren't just about willpower. Learn how your brain, hormones, sleep, and diet all influence why you reach for something sweet.

Edamame contains phytoestrogens, but research suggests moderate intake doesn't meaningfully affect testosterone or fertility in most men.

Fever blisters are caused by a virus that never fully leaves your body. Here's how it hides, reactivates, and what you can do about it.

Infertility has many possible causes, from hormonal conditions and structural issues to age, lifestyle, and medical treatments, in both men and women.

Avocados are rich in heart-friendly monounsaturated fats, fiber, and key nutrients—but portion size and digestive tolerance still matter.

MSG's headache reputation comes from a 1960s case report, but the science tells a more nuanced story about dose, sensitivity, and glutamate.

Appendicitis is usually treated with surgery, but antibiotics alone may work in some cases. Learn what to expect from diagnosis through recovery.

Menopause can seriously disrupt sleep. Learn which treatments—from CBT-I to hormone therapy—are backed by evidence and how to combine them effectively.

From diet and genetics to hormones and medications, here's what's actually driving your cholesterol levels and what healthy numbers look like.

Practical ways to ease digestive issues naturally, from adjusting fiber intake to managing stress and spotting when to see a doctor.

Sleep restriction therapy treats insomnia by temporarily limiting time in bed to rebuild a stronger, more consistent sleep drive.

Melatonin gummies can help with sleep, but dosing is tricky and labels are often inaccurate. Here's what you need to know before taking them.