Anchoring on GHK-Cu keeps all four components in reasonable research territory at one convenient 10-unit draw
MK-677 raises baseline IGF-1 by 4090% but suppresses natural growth hormone pulsatility through negative feedback, limiting its use to short 46 week maximum stimulus cycles
Both claims to provide remarkable benefits for achieving healthier skin, but what sets them apart
References: Isidro ML, Cordido F
McKee KK, Tan CP, Palyha OC, Liu J, Feighner SD, Hreniuk DL, Smith RG, Howard AD, Van der Ploeg LH
Common reconstitution scenarios clinicians use: 50 mg vial + 2.5 ml water 20 mg/ml - 1 mg = 0.05 ml ( 5 units on a U-100 insulin syringe)