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Prior research has shown that regular, moderate exercise may help boost the immune system and reduce respiratory infections, but research has also shown that people who engage in regular, intense and prolonged exercise—such as athletes—may be at increased risk for respiratory infections.
In this study, researchers test the effects of pleuran, an insoluble form of beta-glucan from the mushroom Pleurotus ostreatus (commercial name Imunoglukan), which has previously been shown to have immune-boosting properties. Every day for three months, 50 randomly assigned athletes were given either two capsules of Immunoglukan (100 mg of beta-glucan and 100 mg of vitamin C) or placebo supplements (vitamin C 100 mg only) and were monitored for symptoms of upper respiratory tract infections for three months following supplementation.
Results showed that the athletes who took pleuran had increased levels of natural “killer” cells—cells in the immune system that help fight infection—and reduced upper-respiratory infection symptoms compared with the placebo group. The authors comment, “[Upper respiratory tract infection] symptoms at a crucial time in the athlete’s training or competition schedule can have adverse effects on performance. It has been suggested that immunonutrition for heavily exercising athletes is needed and helps maintain immunity and health.”
While such research holds promise, this is one small study, supported by the makers of Immunoglukan, so further research is needed to assess the safety and effectiveness of such supplements.
In the meantime, for athletes who need to be on top of their game in order to perform and win, here are a few tips for staying in optimal shape:
(Eur J Appl Physiol DOI 10.1007/s00421-011-1837-z)
Jane Hart, MD, board-certified in internal medicine, serves in a variety of professional roles including consultant, journalist, and educator. Dr. Hart, a Clinical Instructor at Case Medical School in Cleveland, Ohio, writes extensively about health and wellness and a variety of other topics for nationally recognized organizations, websites, and print publications. Sought out for her expertise in the areas of integrative and preventive medicine, she is frequently quoted by national and local media. Dr. Hart is a professional lecturer for healthcare professionals, consumers, and youth and is a regular corporate speaker.