US Nutritional supplementation regulations imposed by collegiate, Olympic, professional and military

As evidenced by the warnings from multiple Sports Medicine and Regulatory groups (1), health and doping concerns over the cavalier use of dietary supplements have long troubled health professionals, especially those who work with drug tested populations.  So much so that at each level of sports you can usually find some limitation of what can be funded or supplied by teams to their athletes here in the U.S., and who is authorized to speak on the topic. 
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