ScienceInsights

Knee replacement can cost tens of thousands, but insurance changes everything. Here's what you'll likely pay out of pocket and how to reduce it.

At 8 weeks, your baby is about the size of a kidney bean and developing fingers, toes, and a beating heart you can see on ultrasound.

A period that's 5 days late can have many causes, from stress and weight changes to thyroid issues and normal variation. Here's how to sort through them.

Cod liver oil offers real benefits for heart health, vitamin D, and mood, but high vitamin A levels make dosage and timing matter more than you'd think.

Eating 4 eggs a day affects cholesterol differently depending on who you are. Here's what the science actually says about eggs, LDL, and heart health.

Most people get their first period between ages 11 and 14, but earlier and later are both normal. Here's what to expect and when to talk to a doctor.

Hormones, diet, stress, and conditions like endometriosis can all cause excess gas in women. Here's what might be behind it and what actually helps.

Learn how to manage bleeding after a tooth extraction, from gauze pressure to diet tips, and when it's time to call your dentist.

Canola and vegetable oil have real nutritional differences. Here's what the science says about fats, cholesterol, and which one is the better choice.

Morning sickness can start as early as week 4 of pregnancy. Learn when nausea typically begins, why it happens, and how to manage it in those first weeks.