Dosage Become a member today and help keep Erowid online. Caffeine Dosage by Erowid Caffeine is a very common substance that is contained in chocolate, soft drinks, tea, coffee, and can also be purchased as capsules, tablets, or powder.
Every individual reacts differently to every chemical.
Substance - Know your Source. Erowid's dosage information is a summary of data gathered from users, research, and other resources and should not be construed as recommendations. Individuals can respond differently to the same dosage. What is safe for one can be deadly for another.