One of Our Ampoules Lists Collagen Seven Times Under Seven Different Names
We were counting protein ingredients across the catalogue when one product kept coming back with a suspiciously high number.
It has collagen on it seven times. Not seven mentions in the marketing — seven separate lines on the ingredient list, each a different name for a differently processed version of the same protein.
Every one of those names is a legitimate INCI entry. Nothing here is against any rule. That is the point.
One 87-ingredient ampoule in our catalogue lists collagen, soluble collagen, atelocollagen, desamidocollagen, procollagen, collagen amino acids and hydrolyzed collagen, at positions 8, 27, 28, 36, 38, 42 and 57. All seven are valid ingredient names for different processing states of the same protein family. Korean ordering rules stop ranking below 1%, so five of the seven sit in the zone where position carries no information. And collagen at any of these molecular weights is far too large to cross the stratum corneum, which the topical literature does not really dispute — it works as a film-forming humectant on the surface.
Seven names, one protein family
Here is what each of them is, because the differences are real even if the effect on your skin is not.
| Position | Name | What it is |
|---|---|---|
| 8 | Hydrolyzed Collagen | Collagen broken into shorter peptide fragments by acid, alkali or enzyme |
| 27 | Atelocollagen | Collagen with its telopeptide ends removed, which lowers immunogenicity |
| 28 | Desamidocollagen | Deamidated collagen, chemically altered for solubility |
| 36 | Soluble Collagen | Collagen still in something close to its native triple helix, kept dissolved |
| 38 | Collagen | The unqualified entry |
| 42 | Collagen Amino Acids | Collagen broken all the way down to free amino acids |
| 57 | Procollagen | The biological precursor molecule |
Look at the two ends of that list. Soluble collagen is close to the intact protein. Collagen amino acids is the protein dismantled into its component parts — glycine, proline, hydroxyproline and the rest — which is chemically no longer collagen in any meaningful sense. It is a bag of amino acids that used to be collagen.
Both count as a collagen line on the label.
The same product also carries hydrolyzed silk, hydrolyzed elastin, hydrolyzed keratin, hydrolyzed pea protein and a wheat protein quat. Twelve protein rows out of eighty-seven.
The size problem
Bos and Meinardi published what is now called the 500 Dalton rule in Experimental Dermatology in 2000. Their argument was that essentially all common contact allergens and topical drugs come in under 500 Da, and that molecules above that mark do not meaningfully cross intact stratum corneum.
It is a rule of thumb, and dermatologists have argued with it ever since, mostly at the margins. Nobody argues with it by three orders of magnitude.
Native collagen is around 300,000 Da. Hydrolysates used in cosmetics are far smaller but still typically run in the thousands. Collagen amino acids are the only entry on that list that would clear 500 Da comfortably, and by the time you are there you are applying glycine and proline, which are not collagen and which your skin already has in abundance.
What topical collagen does instead is sit on the surface, hold water, and form a film that smooths the way light comes off skin. That is a genuine cosmetic effect. It is not the effect the word implies.
We want to be careful to separate this from the oral literature, which is a different and considerably more encouraging body of work with its own meta-analyses. Swallowing collagen peptides and putting them on your face are not the same intervention and should not borrow each other's evidence. On the topical side, the 2020 review we found on collagen hydrolysates covers both routes, and we could not get past its paywall this week to see how it weighs them.
Where the seven sit
Korean labelling rules put ingredients in descending order of content, and stop at 1%. Below that line a company may list what remains in any order.
One collagen entry sits at position 8, which is high enough to be real. The other six sit at 27, 28, 36, 38, 42 and 57 — well inside the region where an 87-ingredient list has almost certainly dropped under one per cent, and where the order is whatever somebody typed.
So the honest reading is: this product contains a meaningful amount of hydrolyzed collagen, plus trace quantities of six other collagen forms. Which is a completely normal way to formulate. Suppliers sell blended collagen complexes, and a formulator buying one gets all its components declared separately.
The label does not distinguish between the one at position 8 and the six below. Seven lines, same typeface, same weight.
What our screening found
We scored this 9.1 and our own data files all seven collagen rows identically, as conditioning agents, which is the correct call and also the one that made us miss the pattern for a year. A screening system that grades ingredients one row at a time cannot see that seven rows are the same story told seven times. Our score has no term for how a list reads, only for what is on it. Worth saying too: the flagged ingredients in this ampoule are not the collagen. They are the hydrolyzed sponge that supplies the spicules, retinol, lavender oil, and three declared fragrance allergens. Six flags out of eighty-seven, and none of them are the word on the front.
Sunday To Monday Diamond Spicule 5000 Shot 1.4g x 2ea
Eighty-seven ingredients including seven collagen forms and twelve protein rows. Also contains retinol, spicules and lavender oil together, which is a lot happening at once — patch test before you use it on a whole face, and not on the same night as anything else active.
The practical takeaway
Count families, not lines. When you scan an ingredient list, collapse everything that shares a root word into one entry before you judge it. Seven collagens is one collagen. Ten hyaluronic acid variants — which this product also has — is one humectant story.
Then check the position of the highest member of that family. That is the only one likely to be present in a quantity the ordering rule can vouch for.
Do not let the length of a protein list decide anything. A product with one hydrolyzed collagen at position 8 and a product with seven collagen entries starting at position 8 are, as far as anyone can tell from a label, the same product.
And treat topical collagen as what it is: a surface humectant with a good name. If you want something that acts below the surface, the molecules that plausibly get there are small ones, and we have written about a few — copper peptides, PDRN, and the spicule route that this particular ampoule is actually built around. Our method is on the awards page.
- Bos JD, Meinardi MMHM. "The 500 Dalton rule for the skin penetration of chemical compounds and drugs." Experimental Dermatology 9:165–169, 2000. PMID 10839713.
- "Collagen Hydrolysates for Skin Protection: Oral Administration and Topical Formulation." 2020. PMID 32098294. Full text not obtained.
- "Use of Collagen in Cosmetic Products." Cosmetics (MDPI), 2024.
- 「화장품법」 제10조 (화장품의 기재사항) and 「시행규칙」 [별표 4] — descending order by content, with the exemption at and below 1%.
- DHALIORA screening data: 56 products, 1,920 ingredient rows, full recount 2026-09-06. Seven collagen-family rows and twelve protein rows in one 87-ingredient product; hydrolyzed proteins present in 7 products overall.
