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Many products sold on websites are not regulated, and the ingredients, purity, or dosage may not match what is listed on the label

Science 346 , 15361540 (2014)

Refrigeration slows this degradation to negligible levels, preserving the medication's intended therapeutic profile over the full shelf life, typically 12-24 months

Furthermore, these data suggested that N-terminal, N-acyl tyrosine containing tripeptides should be biologically active

Mamm Genome 12:416425 Lin K, Hsin H, Libina N, Kenyon C (2001) Regulation of the Caenorhabditis elegans longevity protein DAF-16 by insulin/IGF-1 and germline signaling

Brain 133 , 26262634 (2010)