Leisman posted a comment in reply that included the communication between the authors and each of the reviewers, he wrote
When combined with other holistic therapies, such as acupuncture, physical therapy, and nutritional support, BPC-157 can enhance recovery and help patients achieve long-term health and vitality
As we age, we make less collagen, which leads to wrinkles
[2] Research suggests GHK-Cu may stimulate fibroblasts, the cells responsible for producing collagen and other connective tissue components
Users maintaining excellent sun protection, adequate moisturization, healthy diet supporting collagen synthesis (adequate protein, vitamin C, copper from foods), sufficient sleep, stress management, and avoidance of collagen-damaging habits (smoking, excessive alcohol) preserve treatment gains better than users with suboptimal skincare and lifestyle creating ongoing skin stress overwhelming GHK-Cu induced improvements
Vitamin B-12 injections are employed to treat a vitamin B-12 deficiency