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Caffeine
- 1. Coffee "Coffee and tea are extremely hurtful to persons who have weak nerves." --- John Wesley, 1747 (in The Iliac Passion )
- 6. 13 mg 0.25% Chocolate (Cacao seed) 10–60 mg 2.5–4.5% Black tea ( Camellia sinensis ) 50–100 mg 0.7–2% Yerba maté leaves 100–250 mg 1–2.5% Coffee beans ( Coffea sp ) 200–400 mg 4–8% Guaraná seed (Paullinia cupana ) Avg. caffeine in a 6 oz beverage Caffeine Content Plant Beverage Caffeine Content Comparison Common Beverage Products