In contrast, certain foods like caffeine-containing foods act as stimulants, which can disturb sleep by revving up the body and brain. As you can see below, caffeine content varies greatly in different foods. The actual caffeine content of the same coffee drink can vary from day to day, even at the same coffee shop because of factors such as roasting and grinding, as well as brewing time.
The caffeine content of tea also is affected by how long it’s brewed. How much caffeine will affect your sleep and that varies for different people. Some individuals are very sensitive to caffeine, while others don’t seem to be bothered at all.
- Coffee, brewed (135 mg / 8 ounces)
- Coffee, instant (95 mg / 8 ounces)
- Tea, leaf or bag (50 mg / 8 ounces)
- Soft drinks (37 – 55 mg / 12 ounces)
- Chocolate ice cream ( 30 – 85 mg / 1 cup)
- Chocolate bar (10 mg / 10 ounces)
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