Keep the details together.
- Product scope
- A skin-care ingredient; this entry is limited to topical cosmetics.
- Route and preparation
- Topical context only; not injection.
- Mechanism
- A complex formed by copper and a tripeptide.
- Evidence
- One post-laser study found no objective between-group skin advantage.
- Limits of the reference
- A topical study cannot establish the effects of an injection.
- Safety context
- FDA identifies limited human safety data for injectable GHK-Cu.
A note on reading the evidence.
Treat a photograph as something to examine, even when its message seems obvious. If images are used to support a claim, check whether lighting, position, timing, and assessment were kept comparable. Look for a stated method of judging change rather than relying only on the pictures selected for display. A report could also include a measured outcome or a participant opinion; record which kind of evidence each statement uses. The useful discussion is about how the comparison was made and whether that method can support the particular change being claimed.
Questions to open a conversation.
- Were the images collected under conditions that allow a fair comparison?
- What method was used to judge the change shown in photographs?
- Does the claim rely on measured change, selected images, or personal impressions?
Source reading.
- CIRCIR · Checked
- MillerPubMed · Checked
- FDA safetyFDA · Checked
- FDA cosmeticsFDA · Checked