What's the best way to get an energy boost without coffee or Red Bull?
If you want the kick without the jitters, pop some American ginseng. Mayo Clinic researchers found that taking 1,000 to 2,000 milligrams of the herb can provide an all-day energy boost. Five hundred milligrams of L-carnitine—an amino acid that shuttles nutrients into cells' power plants will also do the trick. Of course the best energy boost is weight lifting. Studies show that pumping iron three times a week can increase energy levels by up to 50 percent even on days you don't lift. You can't get those results in a bottle.
— Mark Moyad, MD, the Phil F. Jenkins director of preventive and alternative medicine at the University of Michigan Medical Center.
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