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Epithalon vs GHK-Cu

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.
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Epithalon

37 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.

Energy
160
Sleep
160

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
155

Self-reported dose per injection

Median bucket: 2+ mg · Most common: 2+ mg

Reports span 0 to ≥ 2 mg (open-ended top bucket)

0–0.025 mg
4
0.2–0.4 mg
5
0.4–0.6 mg
14
1–2 mg
4
2+ mg
133

Anonymized self-reports from PeptIQ users — not prescribing guidance. Buckets group similar logged amounts; open-ended top buckets mean “at least” that dose.

How repeat users are trending

Among repeat reporters, 86% said they felt similar to their last entry, 14% more positive, and 0% more negative.

Overall, repeat reporters leaned more positive than their previous entry.

Median gap between entries: 32 days · Based on 35 repeat reporters

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.

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

Sources (19)

Published sources linked on the Epithalon and GHK-Cu wiki pages.

  1. PubMed

    Effect of Epitalon on biomarkers of aging, life span and spontaneous tumor incidence

    Anisimov VN, Khavinson VK, Popovich IG, et al. Biogerontology. 2003

    Source
    Wiki study page →

  2. PubMed

    Epitalon peptide induces telomerase activity in human somatic cells

    Khavinson VK, Bondarev IE, Butyugov AA. Bull Exp Biol Med. 2003

    Source
    Wiki study page →

  4. ClinicalTrials.gov

    Epitalon / epithalon studies on ClinicalTrials.gov

    ClinicalTrials.gov. Clinical trial registry. 2024

    Source
    Wiki study page →

  5. PubMed

    Peptide promotes overcoming of the division limit in human somatic cell

    Khavinson VKh, Bondarev IE, Butyugov AA, et al. Bulletin of experimental biology and medicine. 2004

    Source
    Wiki study page →

  6. PubMed

    Reparative effect of epithalon on pineal gland ultrastructure in gamma-irradiated rats

    Khavinson VK, Yakovleva ND, Popuchiev VV, et al. Bull Exp Biol Med. 2001

    Source
    Wiki study page →

  7. PubMed

    Effect of pineal peptides on neuroendocrine system after pinealectomy

    Khavinson VKh, Kvetnoi IM, Popuchiev VV, et al. Arkh Patol. 2001

    Source
    Wiki study page →

  8. PubMed

    Modulating effects of epithalamin and epithalon on the functional morphology of the spleen in old pinealectomized rats

    Khavinson VK, Konovalov SS, Yuzhakov VV, et al. Bull Exp Biol Med. 2001

    Source
    Wiki study page →

  10. PubMed

    Pineal-regulating tetrapeptide epitalon improves eye retina condition in retinitis pigmentosa

    Khavinson V, Razumovsky M, Trofimova S, et al. Neuro Endocrinol Lett. 2002

    Source
    Wiki study page →

  12. PubMed

    AEDG Peptide (Epitalon) Stimulates Gene Expression and Protein Synthesis during Neurogenesis: Possible Epigenetic Mechanism

    Khavinson V, Diomede F, Mironova E, et al. Molecules. 2020

    Source
    Wiki study page →

  13. Review Article

    Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions

    Rahman OF, Lee SJ, Seeds WA. J Am Acad Orthop Surg Glob Res Rev. 2026

    Source
    Wiki study page →

  14. 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

    Source
    Wiki study page →

  16. PubMed

    GHK peptide as a natural modulator of multiple cellular pathways

    Pickart L, Margolina A. Biomed Res Int. 2014

    Source
    Wiki study page →

  17. ClinicalTrials.gov

    GHK-Cu copper peptide studies on ClinicalTrials.gov

    ClinicalTrials.gov. Clinical trial registry. 2024

    Source
    Wiki study page →

  18. 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

    Source
    Wiki study page →

  19. 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

    Source
    Wiki study page →

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