Do certain coffee brewing methods extract more caffeine than others? We chat with a coffee brewing expert about caffeine content of each type. Whether it’s cold brew, espresso, or good ol’ pour over, ...

For most adults, the FDA recommends no more than 400 milligrams of caffeine per day, or about two to three 12-ounce cups of coffee. A slice of cake is less than a tenth of that daily recommendation.

While it may mystify those of us that need strong coffee to get through the workday, some people actually drink decaf, whether for health reasons, pregnancy cautions or personal preference. USDA ...