Tripeptide-1

Overview

Tripeptide-1 is the free (uncomplexed) form of GHK — glycyl-L-histidyl-L-lysine — without the copper ion. It is the same fundamental signal molecule as the famous copper-bound version, but supplied as a white peptide powder rather than the bright blue copper complex. The advantage of the free form is that it does not have the copper-related formulation restrictions: you can use it alongside vitamin C and standard chelators without the peptide falling apart.

The trade-off is that without the bound copper, some of the wound-healing and antioxidant effects are reduced. The signal-peptide function — telling fibroblasts to make more collagen and elastin — is still present.

As a raw material it is a fine white crystalline powder, fully water-soluble, with no scent. Suppliers also sell pre-diluted solutions, in which case the actual peptide content is usually 100-1000 ppm. Shelf life as raw powder is 2-3 years stored cool and dry; in finished formula it is stable for 12-18 months.

What it does in a formula

The peptide signals fibroblasts in the upper dermis to increase production of collagen, elastin, glycosaminoglycans, and fibronectin. It also acts as a mild antioxidant on its own. Compared to the copper-bound version, it is gentler, less colored in finished products, and easier to combine with other actives.

It is functionally invisible in a serum — no scent, no color contribution at use levels, no impact on texture. It plays well with niacinamide, hyaluronic acid, panthenol, and most other peptides.

How to use

Cool-down only, below 40 C. Stir in gently after the emulsion has cooled. Peptides do not benefit from prolonged heat.

Usage rates by product type:

• Anti-aging face serums: 1-3%
• Eye creams: 1-2%
• Night creams: 1-2%
• Day moisturizers (firming): 1-2%
• Body firming lotions: 1-2%
• Post-procedure repair serums: 2-3%

When working from a pre-diluted supplier solution, follow the supplier’s recommended use percentage rather than the figures above.

Best for / Worst for

Best for: mature skin, post-procedure recovery, formulators wanting GHK without copper limitations, sensitive skin types, products that need to be combined with vitamin C.

Worst for: anhydrous balms (no water base), low-pH AHA exfoliants in the same product, expectations of overnight visible change.

Common pitfalls

Confusing it with copper tripeptide-1. The two are related but not interchangeable. The copper version is blue and carries additional wound-healing and antioxidant properties from the bound copper ion; the free form is white and is purely a signal peptide. Choosing between them depends on whether copper-related restrictions (no vitamin C in the same bottle, no EDTA) are acceptable.

Cooking it. Always cool-down, below 40 C. Heat-phase addition slowly reduces activity over the product’s shelf life. The peptide is reasonably robust briefly, but prolonged warming above 50 C measurably degrades the active.

Combining with low-pH actives in the same bottle. Best at pH 4.5-6.5. Below pH 4 the peptide structure begins to break down over weeks in the bottle, especially if alongside strong AHAs.

Expecting fast results. Realistic timeline is 6-12 weeks of consistent twice-daily use before visible change in fine lines or skin firmness. Once-daily use significantly extends the timeline; skipping days extends it further.

Confusing supplier blend percentage with pure peptide percentage. When buying pre-diluted supplier solutions, a 1-3% formula percentage refers to the supplier liquid, not pure peptide. Read the supplier specification carefully — the actual peptide content is typically 100-1000 ppm of the supplier liquid.

Stacking too many signal peptides without rationale. Combining tripeptide-1 plus palmitoyl tripeptide-1 plus palmitoyl tripeptide-38 in one formula is overkill. Pick a complementary pair instead.

Substitutes

• Copper Tripeptide-1 (GHK-Cu) — the copper-bound version with added wound-healing properties.
• Palmitoyl Tripeptide-1 + Tetrapeptide-7 — different signal peptides for the same anti-aging role.
• Palmitoyl Tripeptide-38 — broader-spectrum signal peptide.
• Niacinamide — non-peptide everyday active for general firmness and barrier.