Fortunately, this can be reversed with careful B12 treatments
Skin Health, Skin Elasticity, and Aging Skin Concerns A review of topical anti-aging peptide studies reported that Cu-GHK formulations were associated with improved visible signs of aged and sun-damaged skin, including skin density, thickness, elasticity, humidity, and wrinkle appearance in 12-week studies involving 71 or 41 women [2]
Weber GF
Do not use sterile water (which lacks preservative and must be used within 24 hours) or normal saline
For context, the phrase genetically heterogeneous just means that the mice have a diverse genetic background, as opposed to mice that have been bred to have nearly identical genetics (also phrased as genetically homogeneous)
This guide separates what has support from what is hype