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10.1038/nature23007 221 VukoviA.-M.Bosello TravainV.BordinL.CozzaG.MiottoG.RossettoM.et al (2020)

"But microdosing has not been well studied in clinical trials, and most of the data is anecdotal." She said that when someone asks her about microdosing a GLP-1, she advises that, since it's off-label (meaning not approved by the FDA), carefully monitoring their blood sugar, weight, and symptoms is essential

Quitting at week 4 because you do not see new hair means abandoning the protocol before it could possibly produce visible growth

Its a synthetic peptide a tiny chain of amino acids (the building blocks of protein)