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Black Tea: On average, an 8-ounce (240 ml) cup of black tea contains about 40-70 milligrams of caffeine. However, this can vary depending on the specific type of black tea and how it's prepared.
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Green Tea: Green tea generally contains less caffeine than black tea. On average, an 8-ounce cup of green tea might have 20-45 milligrams of caffeine.
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White Tea: White tea typically contains less caffeine than both black and green tea, with an average of 15-30 milligrams per 8-ounce cup.
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Herbal Tea: Herbal teas can vary widely in caffeine content because they are not made from the tea plant (Camellia sinensis). Some herbal teas are caffeine-free, while others, like Yerba Mate or guayusa, can have caffeine levels similar to or higher than black tea.
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Decaffeinated Tea: Decaffeinated tea is processed to remove most of the caffeine. However, it's not entirely caffeine-free. Depending on the brand and process, decaffeinated tea can have trace amounts of caffeine, usually much less than regular tea.
- Oolong Tea: Oolong tea falls somewhere between black and green tea in terms of caffeine content. On average, an 8-ounce cup of oolong tea might have about 30-50 milligrams of caffeine.
Remember that these are approximate values, and the actual caffeine content in your tea may vary. Factors such as the type of tea, the brewing method, and the brewing time can all influence caffeine levels.
