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Insulin-like Growth Factor 1 (IGF-1) is a hormone produced by the liver that plays a major role in growth and development (National Library of Medicine)

GSSG glutathione disulfide the amino acid cysteine undergoes oxidation and reduction reactions involving the -SH (sulfhydryl group)

MOTS-C 10mg Summary Description: MOTS-c (Mitochondrial ORF of the 12S rRNA type c) is a mitochondrial-derived peptide that plays a vital role in regulating metabolism, energy balance, and cellular stress responses

It is interesting to note that most algae have two GHR members including one isoform with an atypical CPWC motif (Figure 2)