DRINKS, trainers and protein shakes which purport to be performance enhancing have a "striking lack of evidence" to back up their claims, a study suggests.
Researchers said it was virtually impossible for the public to make informed choice about the benefits and harms of advertised sports products.
The study's authors examined the science behind the marketing and found more than half of 104 performance-enhancing products made claims which were not substantiated by any evidence.
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