does ghk-cu lose effectiveness over time or develop tolerance Making Skin Worse: Complete Troubleshooting Guide Blue copper peptide (GHK-Cu): the

However, very high doses from supplements or injections may lead to certain side effects in some individuals

"The Future of Obesity Treatment: Exploring the Potential of Amylin Analogs and Combination Therapies." Nature Reviews Endocrinology, 18(7), 412-427.

Products with the ingredient can be used daily, as part of a morning or nighttime routine

In one mouse study, researchers found that the peptide reduced the pain felt by the animals in their paws when placed on a mildly hot plate. The authors explained that this could be because GHK is similar in structure to cimetidine, a histamine H2 receptor antagonist sometimes given to reduce pain in certain digestive conditions