In a recent study, doses of 1,000mg of vitamin C and 235mg of vitamin E—both antioxidants—taken daily during 11 weeks of training decreased participants’ endurance by slowing the production of mitochondria, cell structures that generate energy. “Multivitamins with low doses of each are probably fine,” says study VIP Gøran Paulsen, Ph.D., “but I generally recommend skipping large doses and focusing on eating fresh vegetables, fruits, and berries instead.”
SOURCE: NORWEGIAN SCHOOL OF SPORT SCIENCES
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