When my dad was a 12-year-old kid in Red Bluff, California, circa 1928, part of the extended family was a man he knew as Uncle Jack Cotney. That they knew of, or he'd admit to, Uncle Jack had survived some 25 stand-up gunfights in his life.
Green tea is a fat burner that does speed up the metabolism, as far as energy drinks however they really speed up the heart not your metabolism. If you're looking for something that will speed up your metabolism there are better choices for that. Good Luck, Casey.
How to Boost Your Metabolism Right Now. If you're like an average American and drink three cups of coffee a day, consider swapping in green tea for one of them. In addition to giving you the metabolism-boosting caffeine jolt you crave, green tea is a rich source of antioxidants called catechins.