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.
If you're looking for ways to boost your metabolism, you may have heard that drinking cold water can help. While it does up your metabolism a little, it may not be the best choice if you're trying to burn more calories for weight loss. The calories in the food you eat provide your body with energy.