Highest caffeine energy drinks
The most caffeine in a single can in the database is 300 mg, shared by 51 drinks from Bang, Bucked Up, C4 and others. The FDA cites 400 mg a day as an amount not generally linked to negative effects in healthy adults, so some of these cans come close to a full day’s amount on their own.
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Ranked from the 346 drinks in the database; data updated Nov 3, 2026. Drinks whose caffeine isn’t disclosed or not yet confirmed from the can are left out of caffeine rankings. Each drink’s page shows its source and the date it was checked.