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Partial recovery of skeletal muscle sodium channel properties in aged rats chronically treated with growth hormone or the GH-secretagogue hexarelin

Popular peptides in this space include GHK-CU, BPC-157, CJC-1295, and SS-31, most of which are injectable

doi: 10.1371/journal.pone.0066051 39 ChungP

Neuroprotection: Protects neurons from oxidative stress and toxic protein accumulation, perhaps slowing cognitive loss and improving mental clarity (particularly in aged brains)

They're the difference between a compound that retains 95% potency at week 8 and one that's functionally inert by week 4, leaving researchers wondering why their IGF-1 didn't budge despite perfect protocol compliance