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Caffeine

Caffeine is a natural stimulant of the methylxanthine class found in coffee beans, tea leaves, cocoa and guarana.

Also listed as Coffee extract, Tea extract, 1 3 7-Trimethylxanthine, Caffeine Anhydrous

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How much is in a drink?

FDA examples for 12 fl oz (about 355 mL) are 113–247 mg in brewed coffee, 71 mg in black tea and 37 mg in green tea. Actual products and serving sizes vary. 1

Sources