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.
Coffee: Research shows that the caffeine in one cup of coffee can temporarily increase metabolism by 15 percent, says Bedwell. And most people will have two to three cups. Whole grains: High-fiber foods take your body longer to digest, which helps speed up metabolism due to the thermic effect of food. Whole grains like brown rice, oats, quinoa, and barley are very high in fiber. Cruciferous vegetables: Broccoli, cauliflower, and Brussels sprouts are especially high in fiber.