REFERENCE FILE
Copper tripeptide-1
Read the record, then work through the questions.
Reference details
Status as of
- Regulatory category
- Topical cosmetic
- Evidence category
- Cosmetic-use evidence
- Mechanism
- A complex formed by copper and a tripeptide.
- Evidence
- One post-laser study found no objective between-group skin advantage.
- Limitations
- A topical study cannot establish the effects of an injection.
- Safety
- FDA identifies limited human safety data for injectable GHK-Cu.
- Formulation and route
- Topical context only; not injection.
- Approval scope
- A skin-care ingredient; this entry is limited to topical cosmetics.
A SECOND LOOK
A question to carry into the reading
For copper tripeptide-1, sort a negative statement by the evidence it would require. Make three headings: no relevant result located, no difference detected, and a particular difference ruled out. Put the exact statement under the heading it actually supports, then write what would be needed to move it to another. A search record can explain what you looked for; an analysis needs its comparison and uncertainty to establish what it could distinguish. Keep any proposed meaningful difference explicit. This exercise helps you describe an unanswered question accurately without converting it into a confident conclusion that an effect is absent.
Questions to keep beside the page
- Does the statement concern a search result or a measured comparison?
- What uncertainty information would be needed to rule out a particular difference?
- Have I stated which difference matters before interpreting the negative wording?
Sources for this file
- CIRCIR · Checked
- MillerPubMed · Checked
- FDA safetyFDA · Checked
- FDA cosmeticsFDA · Checked
FROM THE REFERENCE DESK