Biology Insights

Fiber, fermented foods, sleep, and exercise do more for your gut than most supplements. Here's what the science actually supports.

Most mosquito bites clear up in a few days, but some linger longer. Here's what affects healing time and how to find relief faster.

Swollen feet and ankles are often harmless, but sometimes point to something more serious. Learn what's behind the puffiness and when to see a doctor.

Period-related chest pain is common and manageable. Learn what causes it and practical ways to find relief, from supportive bras to supplements.

Toe walking is common in toddlers, but sometimes it lingers. Learn what causes it, when it's worth mentioning to your pediatrician, and how it's treated.

Practical tips to help your baby sleep longer at night, from wake windows and bedtime routines to sleep training methods that fit your family.

Bone broth has more protein and collagen than chicken broth, but the mineral benefits are often overstated. Here's what the evidence actually shows.

A large egg has around 70 calories, mostly from the yolk. Learn how cooking method and egg size affect the count, plus what the research says about cholesterol.

From water to coffee to smoothies, here are the best things to mix protein powder with and how each option affects taste, nutrition, and your goals.

Androphobia is an intense fear of men that can affect daily life. Learn what causes it, how it's diagnosed, and what treatments can help.

Low blood sugar can happen for many reasons, from skipped meals to medication. Learn what triggers it, how to recognize the signs, and what to do about it.

HIV transmission risk varies widely depending on exposure type. Here's what the numbers actually say and how prevention methods affect your real-world risk.

10mg melatonin is higher than most people need. Learn what dose actually works and how to use your tablets safely.

At 3 weeks old, babies can focus about 8–12 inches away and already prefer faces, but color and depth perception are still developing.

Find out which cough remedies actually work, from home treatments to herbal options, plus when it's time to see a doctor.

Practical steps to ease back pain, from ice and heat therapy to stretches, sleep positions, and when to see a doctor.

Dementia progression varies widely by type, stage, and individual factors. Here's what research says about typical timelines and what influences them.

Daily sex has real effects on your body and relationship — from sperm quality and heart health to UTI risk and soreness. Here's what the science says.