Scientific Studies

Does coffee raise cholesterol? How cafestol in unfiltered coffee affects LDL — and why your brewing method matters more than the beans.

Why does coffee make you jittery? Learn how caffeine triggers adrenaline, why some feel it more, and how to enjoy coffee without the shakes.

Is drinking coffee on an empty stomach bad for you? Here is what the science says about stomach acid, cortisol, jitters, and who should be careful.

Does coffee before a workout actually help? Here is what the science says about caffeine, timing, dosage, and getting a real performance boost.

Does coffee stunt your growth? We unpack the science behind the myth, what caffeine really does to bones, and what actually affects your height.

Why does coffee make you poop? Explore the science of the gastrocolic reflex, gut hormones, and why even decaf can send you to the bathroom.

Is coffee good for you? A clear look at what large studies say about coffee and your liver, brain, heart, diabetes risk, and longevity.

Does coffee dehydrate you? Despite the popular myth, moderate coffee hydrates you almost as well as water. Here is what the science actually says.

How is decaf coffee made? A clear look at the four decaffeination methods—solvent, Swiss Water, CO2, and sugarcane—and what really ends up in your cup.

How long does caffeine last? Caffeine’s half-life, how long it stays in your system, and timing tips for better sleep.