- Pregnancy and breastfeeding
Some UK product information leaflets (SmPCs) for B12 preparations do mention skin reactions as potential side effects, though not all specifically list acne
ACN, acetonitrile
Glutathione may be the answer
Benefits of Copper Peptides in Skin Renewal. 2024
References [1] National Library of Medicine, Pentadecapeptide BPC 157 Enhances the Growth Hormone Receptor Expression in Tendon Fibroblasts, Chang, C., Tsai, W, Hsu, Y, Pang, J.S., 2014 [2] National Library of Medicine, Emerging Use of BPC-157 in Orthopaedic Sports Medicine: A Systematic Review, Vasireddi, N., Hahamyan, H., Salata, M., Karns, M., Calcei, J., Voos, J., Apostolakos, J., July 2025 [3] National Library of Medicine, Pentadecapeptide BPC 157 Enhances the Growth Hormone Receptor Expression in Tendon Fibroblasts, Chang, C., Tsai, W., Hsu, Y., Pang, JS., November 2014