Caffeine is used in many market-leading fat-burning supplements due to its ability to increase your resting metabolic rate (RMR). By increasing your metabolic rate, you will find it easier to shed the pounds as well as being able to eat more without gaining weight. Drinking coffee in the morning can boost your metabolic rate by stimulating thermogenesis which helps you to burn more fat. Research has shown that metabolic rates were boosted for up to three hours after consuming 8mg/kg of caffeine. Other studies have also indicated that caffeine can increase your base metabolic rate (BMR) by as much as 11%. It is worth noting, however, that these effects are more prominent in lean people than in obese people. Nonetheless, there is still an improvement for everybody, meaning a morning cup of coffee will help with weight loss and can feature prominently as part of a diet plan.