ScienceInsights

Raynaud's disease stems from blood vessels overreacting to cold or stress, but the underlying cause varies depending on whether another condition is involved.

Healthy weight depends on more than a number on a scale. Learn how height, age, and body composition all factor into finding a range that works for you.

A look at the most commonly prescribed diabetes medications today, from metformin to semaglutide, and what makes each one useful for managing blood sugar.

Most 4-month-olds need 24–32 oz of formula or 8–12 nursing sessions daily, but hunger cues matter more than strict amounts.

Swallowed a ZYN pouch? Here's what actually happens in your body, when to be concerned, and why it's a bigger deal for kids.

STI incubation periods in women vary widely—some appear in days, others take weeks or show no symptoms at all. Here's what to expect for each.

Learn which early pregnancy symptoms, from implantation bleeding to fatigue, might signal you're pregnant before taking a test.

Learn how to recognize herpes symptoms, why many people don't know they have it, and when to get tested with a swab or blood test.

200 mg progesterone is common in HRT, but is it actually high? Learn where it falls in the dosing range and what side effects to expect.

Find out how many grams of fat to eat daily, which types to favor, and how your diet style affects the numbers.