Integrated Wellness · Research education
Compare the science.
Put two to four molecules side by side. Similar goals do not mean similar mechanisms, evidence or risks.
Choose your molecules
2 of 4 selected · Choose at least 2
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| Research dimension | GHK-Cu Human research | Melanotan II Limited / uncertain |
|---|---|---|
| Biological classification | Copper-binding tripeptide complex | Nonselective melanocortin receptor agonist |
| Mechanism & pathway | Copper binding and interactions with cellular signaling are investigated in relation to collagen, extracellular-matrix remodeling and tissue responses. Effects depend on model, formulation and route. | Activates multiple melanocortin receptor subtypes, affecting pigmentation and other signals. Receptor activation does not make unregulated cosmetic use safe. |
| Investigated applications | Topical skin remodeling and extracellular-matrix biology. | Pigmentation and historical sexual-function research. |
| Evidence quality | Human research | Limited / uncertain |
| What remains uncertain | The review combines mechanistic and topical research. Topical cosmetic findings cannot be extrapolated to injection, systemic recovery or lifespan benefits. | The reference citation could not be independently matched in this edition. FDA safety information is linked; cosmetic efficacy and long-term safety are not established. |
| Safety considerations | Topical irritation or sensitivity is possible. Injectable exposure has different risks; FDA identifies aggregation, impurities and limited human safety information for injections. | Serious case reports include priapism, neurological syndromes and melanoma; case reports do not establish causality. Changes in skin lesions warrant medical evaluation. Tanning does not ensure UV protection. |
| Regulatory classification | Not FDA-approved as a drugCosmetic use is not FDA drug approval. GHK-Cu is not FDA-approved as an injectable medication; topical and injectable exposure are not interchangeable. | Not FDA-approvedNo FDA-approved finished drug for this molecule is identified in this edition. Investigational use, published research or compounding does not establish FDA approval. |
Comparing molecules is not a recommendation to combine them. Clinical evidence for one product or indication cannot establish another’s safety or effectiveness. Open each profile for study types, source links and important evidence limitations.