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.
When it comes to weight loss, boosting your metabolism is the holy grail. Although there are many factors which affect your metabolic rate which you cannot control, such as age, gender, and genetics, there are ways to give your metabolism a boost. One easy way is to drink metabolism boosting drinks.