From supermarkets to the office supply store, it's hard to miss those tiny bottles of 5-hour Energy.... Each 2-ounce bottle contains zero grams of sugar, 4 calories and about the same amount of caffeine as a small coffee. It also contains about a dozen ingredients that are broken down into B vitamins (B3, B6, B9, B12) and what the manufacturer lists as an "energy blend."
But don't expect superhuman results, one expert said.
"The B vitamins are given at extraordinarily high levels, and people need to know they are not some magic potion that's going to immediately raise your energy level," said Dr. Brent Bauer, Mayo Clinic director of complementary and integrative medicine. "There is no data that show that."
CNN, By Danielle Dellorto, 07/15/09