The Copper Peptide Disclosure Index
We checked what 23 copper peptide products actually tell you about themselves. Not whether they work. Just whether the brand states the concentration, the pH, and the full ingredient list.
We sell copper peptides, so we are in the table too and scored the same way. Where a competitor discloses more than we do, we say so.
The headline
- 13 of 23 state a concentration. 9 do not. 1 states it ambiguously.
- Disclosed concentrations run from 5 ppm to 4%. That is an 8,000-fold range inside one product category, all sold as copper peptide serums.
- Only 4 of 23 publish a formulation pH, despite pH being the variable that determines whether the copper stays attached to the peptide.
- All 23 publish a full INCI list. That part of the category is genuinely fine.
The 8,000-fold range is the number worth sitting with. If you buy two products from this list without checking, you can end up with a 2,000-fold difference in active and no way to know from the packaging.
Brands that state a concentration
| Brand | Product | Stated concentration | pH stated | INCI position | Price |
|---|---|---|---|---|---|
| Neurogan Health | GHK-Cu Hair & Scalp Serum | 4% | no | 2nd of 2 | $55 / 60ml |
| Neurogan Health | GHK-Cu Face & Neck Serum | 4% | no | 1st of 15 | $51 |
| Neurogan Health | GHK-Cu Neck & Face Serum | 4% | no | 1st of 13 | $40 |
| Aseir Custom | Royal Blue Serum | 3% | no | 7th of 12 | $149.99 |
| Aseir Custom | Sky Blue Cream | 3% | no | 11th of 11 | $149.99 / 30ml |
| amide | Dermal Recovery Serum | 1% | yes, 6.0 | 8th of 25 | $60 / 30ml |
| amide | Follicle Protocol Serum | 1% | yes, 6.0 | 8th of 25 | $60 / 30ml |
| NIOD | Copper Amino Isolate Serum 3 (CAIS3) | 1% GHK-Cu, plus 1% GHK | yes, 5.7 to 6.7 | 4th of 20 | $62 / 15ml |
| NIOD | Copper Amino Isolate Lipid (CAIL) | 1% Pal-GHK-Cu | yes, 4.8 to 5.8 | 9th of 21 | $93 / 15ml |
| Black Tie Health | GHK-Cu Copper Peptide Serum 1% | 1% | no | 3rd of 4 | $49.99 |
| Skin Perfection | GHK-Cu Copper Peptide Serum | 1% | no | 2nd of 3 | $33.95 / ~15ml |
| Dr. Brenner Labs | Copper Peptide Serum | 1% | no | 6th of 12 | $29.99 |
| Asterwood | Copper Peptides Serum | 0.10% | no | 5th of 6 | $21.99 / 1oz |
| Good Molecules | Super Peptide Serum | 5 ppm (0.0005%) | yes, 6.09 | 15th of 16 | $12 / 30ml |
Brands that do not state a concentration
This is not an accusation. There is no legal requirement to disclose, and plenty of respected brands do not. It is simply a fact a buyer might want.
| Brand | Product | INCI position | Price |
|---|---|---|---|
| Skin Biology | CP Serum | listed, position varies | $27.50 / 1oz |
| Skin Biology | Super CP Serum | listed | $34 / 1oz |
| Skin Biology | Super Cop 2X | listed | $66 / 1oz |
| Skin Biology | Folligen Cream | listed | $29 |
| Skin Biology | Folligen Solution Spray | listed | $16.50 to $58 |
| Biossance | Squalane + Copper Peptide Rapid Plumping Serum | 7th of 32 | $69 / 50ml |
| COSRX | The 6 Peptide Skin Booster Serum | 8th of 44 | $25 / 150ml |
| Divi | Scalp Serum | 5th of 32 | $48 / 30ml |
| PURA D’OR | Hair Thinning Therapy Scalp Serum | 40th of 65 | $24.99 / 4oz |
| Sensora Skincare | Copper Peptide Serum | 1st of 8 | GBP 14.50 |
The ambiguous one
The Ordinary, Multi-Peptide + Copper Peptides 1% Serum. $32 for 30ml, pH stated as 6.0 to 7.0, copper tripeptide-1 is 4th of 49 ingredients.
The 1% appears in the product name. What the page does not make unambiguous is whether that 1% refers specifically to GHK-Cu or to a copper peptide complex more broadly. We scored it as partial rather than as either a yes or a no, because we could not resolve it from the page and we are not going to guess in either direction.
Where we lose
Two entries here disclose more than we do, and it would be dishonest to bury them in a table.
NIOD publishes a pH range on both products and separates the copper-bound peptide from the free peptide, which is more granular than anything we publish. Their CAIS3 disclosure is the most detailed in this dataset.
Good Molecules discloses to four decimal places and states a pH. At 5 ppm that is a very small amount of copper peptide, and they still put the number on the page. Disclosing an unflattering number is harder than disclosing a flattering one, and it deserves noting.
How to read the INCI position column
Ingredients are listed in descending order by weight down to 1%, below which they can appear in any order. So a copper peptide listed 40th of 65 is almost certainly present below 1%. A copper peptide listed 4th could be anywhere at or above roughly 1%.
It is a floor and a ceiling, not a measurement. Treat it as a sanity check on a stated number, not a substitute for one.
Method
Checked 24 August 2026. Every entry was researched from the brand’s own product page, then independently re-checked by a second pass against the same live source. Prices are spot checks in the currency shown and will drift.
Several entries were corrected during the second pass, and a handful of products were dropped entirely because a claim could not be verified to a standard we were willing to publish. We would rather show 23 products we are confident in than 40 we are not.
Third-party ingredient databases were deliberately not used as sources. Brand pages and manufacturer formulations change, and databases lag. Where a brand’s own page and a database disagreed, we used the brand page and discarded the database.
NIOD prices were listed but both sizes showed out of stock at time of check. Some brands sell in fluid ounces rather than millilitres and we have quoted whichever the brand prints.
Corrections
If we have your product wrong, email support@amide.skin with the URL and we will fix it and note the change. That applies to competitors as much as anyone. A table like this is only worth anything if it is right.
Related: our audit of the clinical literature, which found three trials and no meta-analyses. And what percentage actually matters, which explains why 4% is not four times better than 1%.
Everything we have written: the copper peptide guide.