A 2021 review in Frontiers in Pharmacology organised the wound-healing literature by tissue category, covering dermal, tendon, ligament, skeletal-muscle, osseous, peripheral-nerve, and vascular models (PMID 34267654)
Maintenance doses are then tailored to keep those levels topped up, and their duration of effect is directly tied to the prescribed frequency (e.g., a shot every 12 weeks for many)
Melatonin is a hormone produced by the brain during darkness
Epithalon has been shown to increase the circadian release of melatonin from the pineal gland and improve the waning secretion pattern in elderly human subjects [6]
b) SNAP-8, an octapeptide related to and acting in the same way as Acetyl-Glu-Glu- Met-Gln-Arg-Arg-NH2