Medically reviewed by Maggie Moon, MS, RD Coffee is a natural caffeine source that has long been studied for its health ...

Caffeine adds up quickly if you're a coffee drinker,” says Steinberg. To put it in perspective: A single venti brewed coffee ...

Studies have found that coffee’s caffeine content boosts metabolic rate, increasing how quickly your body burns fat. Another smaller study found that ingesting caffeine led to a 13% increase in ...