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Francesco Puppi, recent podium finisher of the Western States 100, wrote a thoughtful piece about the state of drug testing in ultras following the high profile test failure of Joyline Chepngeno in 2025

Hence, the FDA cracking down on compounding pharmacies mixing peptides that the agency deems under-researched or dangerous

Injections tend to act fastest, with many patients reporting an energy boost within an hour or two of administration

M.et al (2009)

Its what I recommend to my patients

These supplements do not typically require a prescription, and people can buy them over the counter in supermarkets or pharmacies