sumanurica ghk-cu repairing serum One of the questions we often receive about our products is: Why is the stored in two-part packaging? , GHK-Cu is an unstable ingredient that can slowly lose its effectiveness you instantly activate each bottle right before use to ensure the ultimate efficacy and safety in every use retinol or ghk-cu topical sumanurica

Copper peptides may do more than condition the scalp early research suggests GHK-Cu can stimulate dermal papilla cells and increase VEGF, both of which are involved in hair follicle activity and growth

In controlled lighting studies involving rodents subjected to constant illumination (a stressor that disrupts circadian patterns), intermittent Epithalon treatment normalized melatonin and cortisol rhythms, partially preserving typical daynight physiological cycles [2][4][5]

J Am Chem Soc 137:1427514280

Adding it slowly against the glass helps avoid damaging the peptide during reconstitution

The result? Staying healthier, longer.*

The concerns are formulation-level: copper ions can potentially destabilize some retinoid formulations, and layering both in one application step can increase irritation risk in sensitive users