How Coffee May Affect Weight
Caffeine can temporarily boost metabolism and increase fat oxidation, which may support weight management when combined with a balanced diet and exercise. Coffee also contains chlorogenic acid, which some studies link to modest reductions in body fat.
What the Research Says
Short-term studies suggest caffeine can raise resting metabolic rate by about 3 to 11 percent, depending on dose and tolerance. Long-term effects are smaller, and many people develop tolerance. A review of randomized trials found that caffeine intake is associated with a slight decrease in body weight and fat mass over time.
Risks and Considerations
Adding sugar, flavored syrups, or cream can turn coffee into a high-calorie drink that may hinder weight loss. Excess caffeine can also cause sleep disruption, anxiety, and increased heart rate in sensitive individuals. For most adults, moderate coffee consumption is considered safe, but individual responses vary.
For more details on caffeine and metabolism, see the Mayo Clinic overview of caffeine and weight management here.
