ScienceInsights

Tirzepatide has a 5-day half-life and takes about 4 weeks to reach steady state. Here's what that means for side effects, surgery, and switching medications.

Most 4-year-olds need 10 to 13 hours of sleep daily, including naps. Here's how to tell if your child is getting enough and how to build healthy sleep habits.

Razor bumps usually clear faster with the right approach. Learn which treatments actually work and how to prevent them from coming back.

Find out how much fat you actually need each day to lose weight, which types to focus on, and how to set a realistic daily target.

Most people with COVID-19 are contagious for about 10 days, but timing varies based on symptoms, immune health, and treatment. Here's what the science says.

Learn to recognize the common and surprising signs of congestive heart failure, from breathlessness and swelling to digestive changes and when to seek emergency care.

Joint pain, morning stiffness, and swelling can all point to arthritis. Learn which symptoms to watch for and when it's time to see a doctor.

Weight varies widely among 10-year-olds. Learn what doctors actually look at to assess if a child is growing healthily.

A honest look at how sex feels for women, from early arousal through orgasm, including why sensation varies and when something feels off.

A late period can be stressful. Learn what actually works to help bring it on, from stress management to medical options, and when to see a doctor.