is ghk-cu a naturally occurring human peptide - for Collagen, Healing & Anti-Aging GHK-Cu: The Peptide That Transforms
Description
Both compounds independently cause nausea, vomiting, diarrhea, and constipation

Zhao X, Dou W, He L, Liang S, Tie J, Liu C, et al

Additionally, challenges stemming from the intricacies of the nasal structure and formulation complexities were addressed

For others, absorption may be limited due to digestive concerns, medications, or individual differences

Chitnis T, Weiner HL
