Category
Skin & hair
Copper peptides, melanocortin tanning agents and cosmetic sequences. Most are regulated as cosmetics rather than as drugs, which is why the trial record is thin: a cosmetic ingredient never has to run the trials a drug does.
What the record holds for this category
7
Compounds tracked
1
With an FDA-approved product
2
With no registered human study
44
Registered studies, all members
Every compound in this category
Ordered by how many people read the Wikipedia article each month, which measures attention and nothing else. The evidence column is what is actually known.
| Compound | FDA status | Human studies | Evidence | Readership |
|---|---|---|---|---|
| GHK-Cu | Research only | 1 | CPhase 1 or 2 only | 20,088 |
| Melanotan II | Research only | 1 | CPhase 1 or 2 only | 11,197 |
| Melanotan I | Approved | 23 | AAn approved product exists | 1,781 |
| Palmitoyl pentapeptide-4 | Research only | 0 | XNo registered human study | 603 |
| Acetyl hexapeptide-8 | Research only | 2 | CPhase 1 or 2 only | 537 |
| Acetyl octapeptide-3 | Research only | 0 | XNo registered human study | — |
| Collagen peptides | Research only | 17 | DStudies, no phase recorded | — |
Compare within this category
These pairs are the most-read members, picked mechanically. Pairing is not a recommendation and says nothing about which is preferable.
Reading on these compounds
Categories are editorial groupings by mechanism — they are not medical classifications, and membership is not a claim that a compound does what the group name suggests. Study counts include only trials whose registered intervention names the compound. Collected 2026-08-02 from ClinicalTrials.gov and Drugs@FDA. How this is put together.