ScienceInsights

Learn what causes a swollen leg, which symptoms need urgent care, and practical ways to reduce swelling through elevation, diet, and movement.

Daily calorie needs vary widely by age, sex, and activity level. Here's what the guidelines say and how to find your personal number.

Learn when to take a pregnancy test, why results can be wrong, and how to tell apart pregnancy signs from PMS or a late period.

Acute alcohol withdrawal typically peaks around days 2–5, but duration varies. Learn what drives the timeline and why medical support matters.

Late period? Learn what actually causes delays and which remedies have real evidence behind them, from stress management to medical options.

Learn which foods to limit based on your kidney stone type, from sodium and oxalates to animal protein and sugary drinks.

Thick mucus in your throat is usually about dehydration or irritation. Here are simple, evidence-based ways to thin it out at home.

Psychiatric service dogs can cost $20,000–$50,000 fully trained, but owner-training and ongoing expenses are worth understanding before you commit.

2,300 mg of sodium is less than a teaspoon of salt. Here's how that daily limit adds up in real foods and how to keep track of it.

A red eye without pain is usually harmless, but the cause matters. Learn what conditions like dry eye, pink eye, or a broken blood vessel could mean for your eyes.