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The demand has given rise to a burgeoning gray market, where wellness spas, multilevel marketers and telehealth websites ply the public with vials of research grade peptides labeled not for human use. More people want to use them, said Lauren Colenso-Semple, a muscle physiology researcher and science communication specialist who follows scientific studies of peptides as part of her work

This result confirmed that SIMS measurements could identify the same molecular ion of the hydrangea blue-complex as that detected by the ESI-TOF-MS analysis

The quality, sterility, peptide concentration, and purity of compounded preparations can differ

doi: 10.1038/nm.3887 147 ShahMSBrownleeM