Fast Five Quiz: Caffeine Facts vs Fiction

Mary L. Windle, PharmD


September 04, 2019

According to a comprehensive view on the safety of ingested caffeine, the thresholds for caffeine toxicity in various age groups are as follows:

  • Healthy adults (aged ≥ 19 years): 400 mg/d

  • Healthy adolescents (aged 12-18 years): 100 mg/d

  • Healthy children (aged < 12 years): 2.5 mg/d

In the United States, the average daily intake is about 180 mg/d, which is the amount of caffeine in up to two cups of coffee.

Read more about caffeine toxicity.


Comments on Medscape are moderated and should be professional in tone and on topic. You must declare any conflicts of interest related to your comments and responses. Please see our Commenting Guide for further information. We reserve the right to remove posts at our sole discretion.