The caffeine content in black tea can vary based on several factors, including the type of tea leaves, the processing method, and the brewing time. On average, an 8-ounce (240 ml) cup of black tea contains approximately 40 to 70 mg of caffeine. However, the actual caffeine content can range from about 30 to 90 mg.

Here are some general guidelines for the caffeine in black tea:

  1. Brewing Time: The longer the tea leaves are steeped, the more caffeine will be extracted into the liquid. If you prefer a milder tea, you can steep it for a shorter time to reduce the caffeine amount.
  2. Type of Tea: Different varieties of black tea may have varying caffeine levels. For example, Assam and Darjeeling black teas are known for having higher caffeine content compared to some other black tea varieties.
  3. Processing Methods: The processing methods used for black tea can also influence its caffeine. Orthodox processing tends to retain more caffeine than CTC (Crush, Tear, Curl) processing.
  4. Leaf Grade: The size and grade of tea leaves can impact caffeine levels. Finer tea leaves generally have more surface area, allowing for more caffeine extraction during brewing.

It’s important to note that these values are approximate, and the caffeine content in black tea can depend on individual factors such as brewing techniques and the specific tea product. Additionally, decaffeinated black tea is available, and its caffeine content is significantly reduced.

If you are sensitive to caffeine or have specific concerns, you may choose to opt for decaffeinated black tea or limit your intake. As with any beverage, moderation is key, and individual tolerance to caffeine varies.

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