ScienceInsights

Olive oil is mostly monounsaturated fat, and that distinction matters for your health. Here's what's actually in it and how it compares to other cooking fats.

Alzheimer's is a type of dementia, but not all dementia is Alzheimer's. Learn how they differ in cause, progression, and treatment.

Keppra can cause fatigue, mood changes, and rare serious reactions. Here's what patients and caregivers should know about its side effects.

Type 1 diabetes isn't caused by sugar or lifestyle. Learn how genetics and environmental triggers lead to it, and what the early stages look like.

65 mg of caffeine is a moderate dose for most adults. Learn how it affects your energy, sleep, and anxiety levels — and who should be more careful.

Learn how prior authorization works, what you can do to speed it up, and your options if your insurance denies your medication request.

Swab tests work best during an outbreak, while blood tests detect herpes without sores. Learn which test fits your situation and what the results mean.

Narcolepsy involves more than just feeling sleepy. Learn the five core symptoms, why they occur, and how doctors diagnose the condition.

Nescafe instant coffee has some real trade-offs worth knowing, from acrylamide levels to 3-in-1 sachets and how much is reasonable to drink daily.

Some popular supplements, including green tea extract, kava, and high-dose vitamin A, can quietly harm your liver. Here's what to watch out for.