A naturally occurring sugar, ribose forms the backbone of the energy molecule (called ATP), which fuels every body function. When more ribose is present, muscle cells are able to create more energy. Jacob Teitelbaum MD, author of From Fatigued to Fantastic! (3rd ed. Penguin/Avery, 2007), recently published a study in the Journal of Alternative and Complementary Medicine which found that when people with chronic fatigue syndrome took ribose daily, energy increased an average of 45 percent after only three weeks. Although his research focused on patients with chronic fatigue syndrome and fibromyalgia, those with garden variety lagging energy levels also can benefit from this supplement.

How to take: 5 grams, three times a day, for three weeks; after that, twice a day for immediate energy needs. If you find yourself feeling hyperactive or if you develop insomnia, lower your dose.