
Coffee Consumption and Its Effect on Metabolism
Coffee affects energy metabolism, but its calories depend on what goes in the cup. Learn how much to drink and what to watch for when eating healthily.
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Coffee affects energy metabolism, but its calories depend on what goes in the cup. Learn how much to drink and what to watch for when eating healthily.

Caffeine content varies with how coffee is prepared. See typical caffeine amounts in coffee, tea and soft drinks, and the recommended daily limit.

How does caffeine affect mental performance? Its effects on attention, memory and reaction time, plus sleep, tolerance and daily intake guidance.