Another important adjunct to sports nutrition is the wide range of sports dietary supplements. Such supplements are expected to enhance sport performance, by assisting either weight control, physical and mental performance (e.g. power, speed, endurance, agility), and recovery. Very few dietary supplements have been proven to possess clinically relevant effectiveness, and others are dangerous and illegal. It should be remembered that dietary supplements are not a substitute for a poor diet, that most are not produced or marketed by homogenous standards, that they are not under tight supervision, and that many are marketed without any proof of efficacy.
Persons that are very active, whether professionally or recreationally, could benefit from consulting with sport dietitians in order to verify proper nutrition, hydration, and supplement use.
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