Table 2. Estimated caffeine doses of commonly ingested caffeinated substances ^{59– 61}.

Beverage	Size	Caffine dose
Coffee	16 oz	140–240 mg
Espresso	1 shot	58–75 mg
Decaf Coffee	16 oz	<10 mg
Black Tea	12 oz	70–75 mg
Green Tea	8 oz	27–36 mg
Cola Beverages	12 oz	34–72 mg
Caffeine caplets	1 caplet	200 mg