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Oxidative Medicine and Cellular Longevity, 2018, 9630175

The compounds covered in this piece GHK-Cu, KPV, GLP-1 agonists, NAD precursors, glutathione, Thymosin Alpha-1, low-dose MOTS-c, DSIP, intermittent Semax and Selank, and Tesamorelin do not have a receptor desensitization mechanism that justifies the universal 8-on, 4-off rule

On the other hand, according to recent structurefunction characterization of reduced folate transport through SLC19A1, ThDP is the best substrate to be exchanged for folate (118)

10.1073/pnas.94.5.1967 Proc

Variants in GHR and related pathways may help provide context for individual receptor sensitivity and baseline GH capacity, supporting more informed provider conversations about secretagogue suitability