Coffee

The resting metabolic rate (RMR) is the rate at which you burn calories while at rest. Coffee contains caffeine, which could speed your metabolism.

Caffeine can raise RMR by 3–11%, according to studies, with higher doses having a stronger impact. It's interesting to note that an increase in fat burning accounts for the majority of the rise in metabolism. According to several studies, people who drink at least 270 mg of caffeine per day, or the equivalent of three cups of coffee, can burn an additional 100 calories every day. Additionally, caffeine appears to be particularly helpful in enhancing your workout performance and may help your body burn fat for energy. However, depending on specific factors like age and body weight, its effects differ from person to person.