Review Article
GHK-Cu may prevent oxidative stress in skin by regulating copper and modifying expression of numerous antioxidant genes
Pickart L, Margolina A. Cosmetics. 2018
Compare
GHK-Cu vs Tirzepatide
Side-by-side observational reports from PeptIQ users. This compares self-reported patterns — not clinical head-to-head trials.
Last reviewed . By the PeptIQ team.
Observational reporting only — not medical advice. Does not recommend doses, protocols, or treatments.
GHK-Cu
120 community reports
Overall experience
From check-in ratings — separate from side effects logged below. Side effects are logged separately from overall experience. A favorable check-in can still include nausea, fatigue, or injection-site reactions.
Favorable 3% · Mixed 97% · Unfavorable overall 0%
Most reported benefits
Benefits users selected when logging a favorable or mixed check-in.
Mood
226
Recovery
226
Energy
1
Most logged side effects
Side effects are logged separately from overall experience. A favorable check-in can still include nausea, fatigue, or injection-site reactions.
Injection site irritation
222
Self-reported dose per injection
Median bucket: 2–3 mg · Most common: 2–3 mg
Reports span 0 to ≥ 5 mg (open-ended top bucket)
0–0.01 mg
1
0.025–0.05 mg
16
0.2–0.4 mg
4
0.6–1 mg
1
1–2 mg
71
2–3 mg
87
3–5 mg
43
5+ mg
5
Anonymized self-reports from PeptIQ users — not prescribing guidance. Buckets group similar logged amounts; open-ended top buckets mean “at least” that dose.
Commonly stacked with
How repeat users are trending
Among repeat reporters, 89% said they felt similar to their last entry, 11% more positive, and 0% more negative.
Overall, repeat reporters leaned more positive than their previous entry.
Median gap between entries: 46 days · Based on 45 repeat reporters
Tirzepatide
7 community reports
Overall experience
From check-in ratings — separate from side effects logged below. Side effects are logged separately from overall experience. A favorable check-in can still include nausea, fatigue, or injection-site reactions.
Favorable 14% · Mixed 0% · Unfavorable overall 86%
Most reported benefits
Benefits users selected when logging a favorable or mixed check-in.
Appetite
7
Sleep
1
Mood
1
Energy
1
Most logged side effects
Side effects are logged separately from overall experience. A favorable check-in can still include nausea, fatigue, or injection-site reactions.
Nausea
3
Injection site irritation
3
Self-reported dose per injection
Median bucket: 5+ mg · Most common: 5+ mg
Reports span 0.4 to ≥ 5 mg (open-ended top bucket)
0.4–0.6 mg
1
5+ mg
6
Anonymized self-reports from PeptIQ users — not prescribing guidance. Buckets group similar logged amounts; open-ended top buckets mean “at least” that dose.
Sources (14)
Published sources linked on the GHK-Cu and Tirzepatide wiki pages.
- Wiki study page →Source
- Wiki study page →Source
PubMed
GHK-Cu in wound healing and tissue regeneration
Pickart L. J Biomater Sci Polym Ed. 2008
- Wiki study page →Source
PubMed
GHK peptide as a natural modulator of multiple cellular pathways
Pickart L, Margolina A. Biomed Res Int. 2014
- Wiki study page →Source
ClinicalTrials.gov
GHK-Cu copper peptide studies on ClinicalTrials.gov
ClinicalTrials.gov. Clinical trial registry. 2024
- Wiki study page →Source
PubMed
GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration
Pickart L, Vasquez-Soltero JM, Margolina A. BioMed research international. 2015
- Wiki study page →Source
PubMed
Biomimetic Hydrogel Scaffolds with Copper Peptide-Functionalized RADA16 Nanofiber Improve Wound Healing in Diabetes
Yang X, Zhang Y, Huang C, et al. Macromolecular bioscience. 2022
- Wiki study page →Source
FDA Drug Label
MOUNJARO (tirzepatide) injection, for subcutaneous use - Prescribing Information
Eli Lilly. FDA Drug Label. 2022
- Wiki study page →Source
PubMed
Tirzepatide Once Weekly for the Treatment of Obesity (SURMOUNT-1)
Jastreboff AM, Aronne LJ, Ahmad NN, et al. N Engl J Med. 2022
- Wiki study page →Source
ClinicalTrials.gov
Tirzepatide obesity studies on ClinicalTrials.gov
ClinicalTrials.gov. Clinical trial registry. 2024
- Wiki study page →Source
PubMed
Tirzepatide versus Semaglutide Once Weekly in Patients with Type 2 Diabetes.
Frías JP, Davies MJ, Rosenstock J, et al. N Engl J Med. 2021
- Wiki study page →Source
PubMed
Tirzepatide Improved Markers of Islet Cell Function and Insulin Sensitivity in People With T2D (SURPASS-2).
Frias JP, De Block C, Brown K, et al. J Clin Endocrinol Metab. 2024
- Wiki study page →Source
FDA Drug Label
ZEPBOUND (tirzepatide) injection, for subcutaneous use - Prescribing Information
Eli Lilly. FDA Drug Label. 2023
- Wiki study page →Source
PubMed
Tirzepatide once weekly for the treatment of obesity in people with type 2 diabetes (SURMOUNT-2): a double-blind, randomised, multicentre, placebo-controlled, phase 3 trial
Garvey WT, Frias JP, Jastreboff AM, et al. Lancet (London, England). 2023
- Wiki study page →Source
PubMed
Tirzepatide for Obesity Treatment and Diabetes Prevention
Jastreboff AM, le Roux CW, Stefanski A, et al. The New England journal of medicine. 2025