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.
He published a review study that found green tea may slightly increase metabolism. We've shown that green tea is able to increase your energy expenditure â so the amount of calories you burn â and also to increase the amount of fat you are burning, Hursel told NPR's Allison Aubrey in 2012.