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.
8 Drink green tea. Drinking green tea is one of the easiest ways to rev up your metabolism. A study reported in the American Journal of Clinical Nutrition found that green tea-extract increases the metabolism by 4% over a 24 hour period. Three to five cups a day can help you burn an extra 70 calories a day, which adds up to seven pounds a year, 35 pounds for five years and 70 pounds for 10 years.