Daily How Much

A 12-ounce can of Diet Coke contains 46 mg of caffeine — about 35% more than regular Coca-Cola but far less than a typical cup of coffee.

Brewed coffee typically contains about 95 mg of caffeine per 8-ounce cup, while black tea has roughly 47 mg — but the actual amount varies depending.

Most healthy adults can safely consume up to 400 mg of caffeine daily, roughly the amount in four cups of brewed coffee, according to FDA guidelines.

Only about 1% to 1.5% of the caffeine a breastfeeding parent consumes passes into their breast milk.

Matcha contains roughly 19 to 44 mg of caffeine per gram of powder, with a typical 2-gram serving providing 38 to 88 mg of caffeine depending.

Moderate caffeine intake, up to roughly 300 mg per day as of 2025, is generally considered safe for most people with atrial fibrillation..

Most experts agree that up to 300 mg of caffeine per day (about two to three cups of coffee) is generally safe for breastfeeding mothers.

For most healthy adults, up to 400 mg of caffeine daily is generally considered safe, roughly the amount in two to three 12-ounce cups of coffee.

White coffee contains slightly more caffeine by volume than darker roasts, but the difference is typically under 5% and heavily influenced by how.

Vitamin Water Energy contains 50 to 60 mg of caffeine per 20 oz bottle, depending on the label region, which is less than a standard cup of coffee.