Asterwood Discloses 0.10% Copper Peptide. Here Is What That Means.
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A competitor wrote this. Checked against asterwood.co on 24 August 2026 and independently re-verified.
The short answer
Asterwood states 0.10% Copper Tripeptide-1. It appears in three separate places on their page: inside the INCI list itself, in the page title tag, and in the meta description.
Their INCI line reads: Water, Pentylene Glycol, Phenylpropanol, Sodium Hyaluronate (1.5%), Copper Tripeptide-1 (0.10%), Sodium Hydroxide.
Putting percentages inside the ingredient list itself is unusually direct. Most brands that disclose do it in marketing copy, where it is easier to be vague.
What is disclosed
| Field | Value |
|---|---|
| Stated concentration | 0.10% Copper Tripeptide-1 |
| Formulation pH | Not disclosed |
| Full INCI published | Yes, 6 ingredients |
| Copper Tripeptide-1 position | 5th of 6 |
| Price | $21.99 (1oz), $31.49 (2oz), $59.99 (8oz) |
Six ingredients total. That is a genuinely minimal formula, which some people specifically want.
What 0.10% means in context
It is one tenth of 1%. Against the range we found across 23 products, which runs from 5 ppm to 4%, it sits low but nowhere near the bottom. It is 200 times more concentrated than the smallest disclosed figure we found.
The honest framing: most of the topical GHK-Cu literature works at or around 1%. 0.10% is an order of magnitude below that. Whether an order of magnitude matters for a signalling molecule is a real question rather than a settled one, and we have written about why more is not linearly better in what percentage actually matters.
What is not in question is that you can make the comparison at all, because they told you. Nine of the 23 products we checked did not.
One packaging note
Their own image description for this product says clear bottle with black dropper. Asterwood explicitly labels a different product in their range as amber glass, so the omission here looks deliberate rather than accidental. Copper peptide complexes are photosensitive, so a clear bottle is a real consideration for a product you will use over weeks. More on that here.
The comparison
At $21.99 for 1oz this is well below our $60 for 30ml. You are getting a simple, honestly labelled formula at a low price with a tenth of the copper peptide concentration, no stated pH, and clear packaging.
Whether that is the right trade depends entirely on whether concentration matters to you, and you have the information to decide, which is the point.
Related
Corrections to support@amide.skin.