Evidence-Based Benefits
- Metabolic rate increase — Dulloo et al. (1989) showed caffeine increases 24-hour energy expenditure by 150 kcal/day at 600 mg in lean subjects
- Fat oxidation — Acheson et al. (2004, n=10) found caffeine 600 mg increased fat oxidation rate by 10-29% depending on body composition
- Body weight reduction — Tabrizi et al. (2019, meta-analysis, 13 RCTs) found caffeine intake significantly reduced body weight, BMI, and body fat
- Exercise performance — caffeine 3-6 mg/kg improves endurance, strength, and power output, increasing exercise-related calorie burn (Goldstein et al., 2010)