If you're one of those people who doesn't feel quite human until your second cup of coffee, you could be drinking too much of the potent beverage, according to a recent study by Mayo Clinic. You may benefit by finding an alternative energy booster that doesn't come packed with as much caffeine or the potential health risks. We've done the research for you and put together a list of herbal solutions that can revive your energy while also improving health and vitality.