What is Tripeptide-1?
Tripeptide-1 is the plain, unmodified form of GHK (glycyl-L-histidyl-L-lysine), a small peptide that occurs naturally in the human body and is known to decline with age. It is the same core peptide sequence found in copper peptides (Copper Tripeptide-1, or GHK-Cu) and in palmitoyl tripeptide-1, but without copper or a fatty acid attached to it. This plain form is sometimes used in skincare on its own, though it is less commonly discussed than its copper-bound or fatty-acid-modified versions.
Source
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Found in |
The tripeptide GHK (glycyl-L-histidyl-L-lysine), unmodified |
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Origin |
GHK occurs naturally in human blood; for cosmetic use it is produced synthetically |
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Also known as |
GHK; related to Copper Tripeptide-1 (GHK-Cu) and Palmitoyl Tripeptide-1 |
Top features and benefits
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Naturally occurring peptide sequence in the human body |
Related to well-studied copper peptide research |
Studied for a role in skin conditioning |
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Generally considered well tolerated |
Building block behind related, more heavily studied peptide ingredients |
How Does It Work?
On its own, plain GHK has shown limited activity in some early research, one animal study comparing plain GHK to GHK-Cu in wound healing found the copper-bound version produced a significant increase in collagen accumulation, while GHK alone did not show the same effect. This is an important distinction: much of the well-documented biological activity associated with this peptide sequence appears to depend specifically on it being paired with copper, or in some cases with a fatty acid tail (as in palmitoyl tripeptide-1), rather than the plain tripeptide alone.