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Vitamin C And E Supplementation Hinders Endurance During Athletic Training

February 3, 2014: 12:00 AM EST
Although it’s probably too late to help the Olympic athletes at Sochi, a finding by Norwegian researchers about the negative impact of vitamin E and C supplementation on endurance could help future competitors. An 11-week clinical study involved 54 young and healthy men and women randomly assigned to take vitamin C or vitamin E supplements, or a placebo. The participants were monitored closely as they took part in an endurance training program, mostly running. The study found that the vitamin C and E supplements seemed to blunt the improvement of muscle endurance by disrupting cellular adaptations in exercised muscles.
Paulsen G et al., "Vitamin C and E supplementation hampers cellular adaptation to endurance training in humans: a double-blind randomized control trial", Journal of Physiology, February 03, 2014, © The Physiological Society
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