Green tea has different ratios of caffeine depending on the type. Learn about high-caffeine coffee alternatives and decaf ...

Whether present in natural sources or in Red Bull Energy Drink your body processes caffeine the same way. One of caffeine’s primary sites of action in the human body is a stimulating effect on ...

Today, there is one method of caffeine intake that has become increasingly popular, especially among young adults — energy ...

Caffeine's stimulating effects can paradoxically lead to sleepiness due to tolerance, adenosine receptor changes, and individual metabolic differences.

"But we've known for centuries that caffeinated drinks work. They get you out of an energy slump and make you more alert. Really all they've found is a new kind of caffeine delivery system." ...

Coffee is the biggest dietary source of caffeine. However, this amount varies between different coffee drinks. This is a detailed guide to the caffeine content of different types and brands of coffee.

A new study found that increased caffeine consumption may influence your risk of Alzheimer's or other forms of dementia. But ...

As is the case with any Starbucks drink, the exact level of caffeine in each Refresher varies widely by size. In a 12-ounce Tall beverage, you can expect to find 35 to 45 milligrams. Meanwhile ...

A groundbreaking research conducted in France has unveiled compelling evidence linking caffeine consumption to reduced ...

Reaching for some caffeine is an energy lifeline for many ... And remember that if you’re a habitual tea drinker or you drink other caffeinated beverages like energy drinks you’ll need ...