Back to the article

HealthRX.com · Printable supplement log

GHK-Cu coadministration record for a pharmacist or clinician

Record the GHK-Cu product and route, every zinc, copper or iron product with its elemental amount, and the medical context. That is what a pharmacist needs to judge a real mineral problem, instead of following an invented timing rule.

Companion to “GHK-Cu With Food and Supplements: What Is Actually Known” · healthrx.com/ghk-cu/food-supplement-interactions · Facts checked 2026-10-18

The GHK-Cu product

Exact name, brand or pharmacy
Lot number and stated concentration
Other listed ingredients
Routeintact-skin topical, after a procedure, microneedled, or injected
What you use it forcosmetic, wound care, other

Mineral products and medicines

"Zinc" is not a dose. Copy the elemental amount from the label, including multivitamins and denture creams that contain zinc.

ProductMineral or medicineElemental amount per dose (mg)How oftenTaking since

Medical context to mention

  • Wilson disease, or a copper-lowering medicine such as penicillamine or trientine
  • Liver disease
  • Kidney disease
  • Pregnancy or breastfeeding
  • Cancer treatment
  • A past low copper or low blood count result

What the evidence says

  • A systematic review of 37 published cases of zinc-induced blood problems found low serum copper in every patient; most recovered after stopping zinc and taking copper.[1]
  • In laboratory tests almost no GHK-Cu or copper crossed intact human skin over 9 hours.[2]
  • FDA flags injectable compounded GHK-Cu for possible immune reactions caused by aggregation and peptide-related impurities.[3]
  • A systematic review searched to March 2026 found 20 GHK-Cu aesthetic studies, 18 preclinical and 2 randomized trials, all testing GHK-Cu on its own rather than with a food or supplement.[4]
  • The registered topical GHK-Cu trial, NCT07437586, has posted no results.[5]

Questions for the pharmacist

  1. Is my total zinc intake from all products high enough to affect my copper?
  2. Should my copper level or blood count be checked?
  3. Does my route of GHK-Cu (on skin, after a procedure, or injected) change anything about my supplements?
  4. Do any of my medicines change copper or zinc balance?
  5. If I use an injected product, who verified its identity and sterility?
Sources for the facts on this sheet
  1. Dutta A, Chaudhary V, Kumari S, et al. Zinc-Induced Hematologic Toxicities: A Systematic Review of Descriptive Studies. Biol Trace Elem Res 2026. PMID 42087025. https://pubmed.ncbi.nlm.nih.gov/42087025/
  2. Li H, Low YS, Chong HP, et al. Microneedle-Mediated Delivery of Copper Peptide Through Skin. Pharm Res 2015. PMID 25690343. https://pubmed.ncbi.nlm.nih.gov/25690343/
  3. U.S. Food and Drug Administration. Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety Risks. Accessed 2026-10-18. https://www.fda.gov/drugs/human-drug-compounding/certain-bulk-drug-substances-use-compounding-may-present-significant-safety-risks
  4. Mokhtar J, Mohamad B, Haddad J, et al. The Regenerative Potential of GHK-Cu in Aesthetic Medicine. Aesthet Surg J 2026. PMID 42619529. https://pubmed.ncbi.nlm.nih.gov/42619529/
  5. U.S. National Library of Medicine, ClinicalTrials.gov (API v2 record). NCT07437586: A Phase 2, Randomized, Double-Blind, Vehicle-Controlled, Split-Wound Study of Topical GHK-Cu (Copper(II)-Peptide Complex) Gel to Accelerate Re-Epithelialization of Standardized Acute Skin Wounds in Healthy Adults. Accessed 2026-10-18. https://clinicaltrials.gov/api/v2/studies/NCT07437586

This sheet records information for a conversation with your prescriber or pharmacist. It does not replace their instructions or the medication's prescribing information.