Peptide vs steroid hormones

Heavy consumption of the essential amino acid lysine (as indicated in the treatment of cold sores) has allegedly shown false positives in some and was cited by American shotputter C. J. Hunter as the reason for his positive test, though in 2004 he admitted to a federal grand jury that he had injected nandrolone. [32] A possible cause of incorrect urine test results is the presence of metabolites from other AAS, though modern urinalysis can usually determine the exact AAS used by analyzing the ratio of the two remaining nandrolone metabolites. As a result of the numerous overturned verdicts, the testing procedure was reviewed by UK Sport . On October 5, 2007, three-time Olympic gold medalist for track and field Marion Jones admitted to use of the drug, and was sentenced to six months in jail for lying to a federal grand jury in 2000. [33]

KTTKS (a pentapeptide) is itself a fragment of dermal collagen, and stimulates collagen production in fibroblast cultures.  At very low levels in culture, KTTKS reduces excess dermal GAG’s. GHK is a tripeptide fragment of collagen. Copper is a required cofactor for activity of lysyl oxidase, an enzyme involved in collagen synthesis.  The complex of copper and a peptide (tri or penta) has been examined extensively in the wound healing literature, and shown to be effective at stimulating collagen as well as specific matrix remodeling MMP’s (matrix metalloproteinases). The specific mechanisms have been investigated at a deeper level and found to include induction of cytokines including FGF (fibroblast growth factor) and specifically the beta-3 version as opposed to beta-1. The latter contributes to scarring during healing, while the former has the opposite effect.

Peptide vs steroid hormones

peptide vs steroid hormones


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