ScienceInsights

Prozac affects your body before your mood. Here's what to actually expect in the weeks after starting it, and how to know if it's helping.

Melatonin typically clears your system in 4–8 hours, but caffeine, age, and dosage can shift that window considerably.

At 4 weeks pregnant, your embryo is tiny but a lot is already happening. Here's what's going on inside your body right now.

Reading glasses come in strengths from +1.00 to +3.50. Learn how age and distance affect which power works best for you.

From glucosamine to omega-3s, learn which supplements have real evidence behind them for easing joint pain and how long they take to work.

An itchy scalp can stem from dandruff, psoriasis, allergies, or infections. Here's how to identify the cause and find real relief.

From weight loss and strength training to medications and diet, here's what the evidence says about slowing arthritis progression.

Lifestyle changes like sleep, diet, and exercise can genuinely improve sperm count—but it takes about three months to see results.

Melatonin is widely used for toddler sleep, but pediatric guidance is still limited. Here's what parents should know about the risks and alternatives.

Stage IV cancer means the disease has spread, and care shifts toward comfort and quality of life. Here's what patients and families can expect.