Many obstetric and public-health sources cap caffeine at 200 mg per day during pregnancy, counting coffee, tea, soda, chocolate, and caffeine-containing meds.

For most healthy adults, going past 400 mg of caffeine in a day is the point where side effects and risk climb fast.

A brewed coffee often lands around 80–100 mg of caffeine per 8 oz, while black tea often lands around 40–60 mg, with steep time and serving size driving the

A decaf Americano still contains caffeine, usually in the single digits to a few dozen milligrams, based on shots and beans.

For most healthy adults, going past 400 mg a day can trigger side effects; pregnancy and teens call for lower limits.

A standard 8-ounce decaf coffee usually contains 2–15 mg of caffeine, so it’s low-caffeine, not caffeine-free.

Decaf coffee still carries caffeine—often 2–15 mg in an 8-oz cup—so the exact hit depends on the beans and how you brew.

An 8-oz mug usually has 40–70 mg of caffeine, set by leaf grade, water temp, and steep time.

A standard 8-ounce drip coffee often lands between 75 and 165 mg of caffeine, with the final number driven by beans, grind, dose, and brew time.

Most healthy adults can stay under 400 mg of caffeine per day, while pregnancy is usually capped at 200 mg, and teens do better with far less.