Multiple clinical trials in photoaged skin (sun damage) have shown that topical GHK-Cu formulations improve skin appearance including reductions in fine lines and wrinkles, improvement in skin firmness and elasticity, enhancement of skin texture and smoothness, increase in skin thickness (reversing age-related dermal atrophy), improvement in skin clarity and reduction in hyperpigmentation, and overall rejuvenated appearance
Storage upon receipt maintains quality
Zou, S., Shimizu, T., Shimizu, S., Higashi, Y., Nakamura, K., Ono, H
For a 10 mg blend the split is typically ~5 mg of each, though this is not labeled on the page
The key insight is that brain health doesn't start in the brain -- it starts in the gut