Guarana seeds, found inside of the plant's brightly colored fruits, are harvested and processed to produce powders and other products high in caffeine. (Photo Credit: Moment RF/Getty Images ...
But it's easier to reach for the coffee when you know how to fine-tune your morning caffeine jolt. Katherine Peach is a well-caffeinated, Brooklyn-based writer, who focuses on all things coffee ...
Then it was Coke Zero – just a couple of bottles, when he craved it – plus a caffeine-packed pre-workout supplement on training days, three or four times a week. If he took that, he figured ...
Caffeine is a natural stimulant. However, some claim it interferes with the absorption of certain nutrients, such as iron. Caffeinated foods and beverages have become staples in most modern-day ...