quantitative
Analysis v1
Strong Support
Many sports supplements you can buy contain hidden illegal drugs that athletes aren't allowed to take. Studies found that between 12 and 58 out of every 100 supplements have these banned substances in them, which could accidentally make an athlete fail a drug test.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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This study reviewed many other studies about sports supplements and found that 12-58% of them contained banned doping substances, exactly matching what the claim says. This confirms that athletes using these supplements risk testing positive for doping without knowing it.
Contradicting (0)
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No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.