Giustarini D et al
If redness continues at reduced dosing, pause for two weeks and observe whether it resolves
Some people tolerate these combinations well, while others notice stinging, peeling, dryness, or irritation
While GHK-Cu is generally well-tolerated in topical research, certain contraindications or precautions should be considered, especially for systemic research or in specific populations: Systemic Research: For systemic applications, GHK-Cu is generally not recommended for subjects who are pregnant, breastfeeding, have active cancer, or suffer from Wilsons disease (a condition involving copper accumulation)
Although uncommon, discussing any concerns with your healthcare provider can help you be prepared
Research-grade GHK-Cu from reputable Canadian suppliers like Red Fox Peptides typically costs $80-120 CAD for 50 mg vials