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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.

Standard Tylenol contains no caffeine, but some combination products like Tylenol Ultra include 65 mg per dose (as of 2025; costs and formulations vary by year and location)..

Standard Pedialyte products for adults contain zero caffeine, focusing solely on rehydration with electrolytes.

A standard teaspoon of Nescafé instant coffee typically contains between 30 and 90 mg of caffeine.

A small (16 oz) McDonald’s fountain Coca-Cola contains approximately 45 mg of caffeine, a medium (21 oz) about 60 mg.

A large (32 oz) sweet tea from McDonald’s contains about 100 mg of caffeine; a medium unsweetened has roughly 34–40 mg.