A meta-analysis of 22 studies found that Alzheimers patients exhibit reduced peripheral TRP, increased KYN/TRP ratio, decreased cerebrospinal fluid 3-HK, and opposing KYNA changes in brain versus blood [250]
The specific order of these 15 amino acids is Gly-Glu-Pro-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val
A low-serum level of IGF-1 has been associated with insulin resistance, and [...] recombinant IGF-1 has been [hypothesized] to improve insulin sensitivity and glucose metabolism. Receptor Grade IGF-1 LR3 and Cell Lifespan Research (6) on murine models observed that common markers of physiological decline, such as muscle tears and neurological deficiencies, appeared to be mitigated for an extended period following routine exposure to the peptide
Journal of Clinical Endocrinology & Metabolism , 89(7), 3543-3553
Hoff G, Bernklev T, Johnsen L, Reitsma L, Sina D, Lauzike A, Gibbs C, Carlsen E, Lende TH, Narvestad JK, Kildahl R, Omdal R, Kvaly JT, Siland H
Candelario, J