Several studies have suggested that caffeine can actually boost your metabolism by up to 11 percent. Coffee without extra sugar or additives contains numerous antioxidants with health benefits. But natural caffeine in coffee or tea is safe in moderation. CaffeineД¬affeine can be dangerous in high doses. So letвЂ™s go over five of the most popular science-backed fat-burning substances that you can consume in many readily available natural forms. This can be a recipe for disaster if youвЂ™re allergic to ingredients in the supplement or if you take too much of a certain nutrient. And regulators arenвЂ™t bound to investigate these products fully unless there are complaints or medical consequences from using these supplements. Manufacturers donвЂ™t always list all the ingredients on the label. ItвЂ™s hard to know how the manufacturer assessed the total amount. The amount might be off - even if the bottle specifies an amount on the label. Some are even proven to help burn fat when theyвЂ™re consumed naturally.Д«ut itвЂ™s impossible to know for sure how much is used in the supplement. ThereвЂ™s no evidence that fat-burning pills or supplements can effectively burn fat.Д«ut they do typically contain ingredients that wonвЂ™t hurt you in small doses when taken alone. Fat-burning ingredients shown to be effective

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