Biology Insights

Learn which foods help settle an upset stomach, what to avoid, and how to stay hydrated when dealing with diarrhea.

Fasting duration matters, but consistency matters more. Here's what the science says about how long you need to fast to actually lose weight.

Most home pregnancy tests work best around the time of a missed period, but timing, test sensitivity, and testing habits all affect how reliable your result will be.

Gabapentin typically takes effect in cats within 1–2 hours. Learn what to expect for vet visits, pain relief, and how long the calming effects last.

Treatment for pink eye depends on the cause. Learn how to tell viral, bacterial, and allergic types apart and what actually helps each one.

At 8 weeks, your baby is about the size of a raspberry with tiny fingers, forming facial features, and already moving around inside you.

Practical, caring guidance on what to say (and avoid) when someone you know has cancer, so your support actually feels supportive.

Learn how popcorn lung develops, what symptoms to watch for, and how doctors diagnose and treat this rare but serious lung condition.

Blisters in the genital area can have several causes, from herpes and syphilis to ingrown hairs and skin reactions. Learn how to tell them apart.

Cold hands and feet can sometimes point to heart or vascular issues, but there are many other causes. Learn when it's worth talking to a doctor.

Outer foot pain can stem from several conditions. Learn what peroneal tendonitis, stress fractures, and cuboid syndrome feel like and when to see a doctor.

THC can stay detectable for days or months depending on how often you use, your body composition, and the type of drug test involved.

Most spider bites heal fine at home with basic care. Learn what to do, what to avoid, and which symptoms mean it's time to see a doctor.

At 13 weeks, your baby is about the size of a lemon and entering a busy stage of development. Here's what's happening right now.

Testing too soon after sex can give misleading results. Learn when pregnancy tests actually work and how to get the most accurate reading.

Learn what cold sores look like at each stage, how they differ from canker sores, and what triggers an outbreak on your lips.

Most men need 2,000–3,000 calories daily, but your age, size, and activity level all shift that number. Here's how to find yours.

Most people stay in ketosis on 20–50g of carbs daily, but your ideal amount depends on metabolism, activity level, and whether you count net or total carbs.

At 14 weeks, your baby is about the size of a lemon and weighs 1.5 ounces. Here's what's developing and what to expect on ultrasound.