ScienceInsights

Hot flashes stem from a disrupted brain thermostat, not just low estrogen. Learn what drives them, who's most at risk, and how long they typically last.

From OTC remedies to prescription options, learn which diarrhea treatments are safe and effective for adults and children.

Chapped lips can be tricky to heal when some products actually make them worse. Learn what ingredients help, what to avoid, and when to see a doctor.

Tretinoin can reduce wrinkles by boosting collagen, but results take months and it's stronger than retinol. Here's what to realistically expect.

Learn what to look for in a cardiac rehab program, from phase structure and eligibility to virtual options and the questions worth asking before you enroll.

From heat pads to magnesium, here's what the evidence says actually helps ease period cramps — and when to talk to a doctor.

Butter has about 30mg of cholesterol per tablespoon, but saturated fat may be the bigger concern for heart health.

Practical, research-backed habits to help you fall asleep faster and sleep more soundly, from room temperature to calming a racing mind.

From constipation to IBS and celiac disease, learn about the most common bowel conditions, what causes them, and when symptoms need medical attention.

STI testing costs vary widely depending on your insurance, testing method, and whether you need one test or a full panel. Here's what to expect.