BLP Tetrapeptide-21 Peptide Solution

BLP Tetrapeptide-21 Peptide Solution is a pure tetrapeptide in a clear, colorless liquid. It is modeled on the skin’s own structures and is used in firming creams and serums for a smoother, denser-looking skin.

What Is BLP Tetrapeptide-21 Peptide Solution?

When collagen breaks down, it forms specific tetrapeptides that act as signals in the skin. The supplier explains that Tetrapeptide-21 follows this idea of a matrikine signal for collagen-focused products. The current INCI is Glycerin, Butylene Glycol, Water, Propanediol, Tetrapeptide-21, Ethylhexylglycerin, Benzoic Acid, and the CAS is listed as a mixture.

Key Properties

Collagen-focused

A good choice for firming and anti-wrinkle claims in face and eye products.

Clear and colorless

It does not tint gels or white creams.

Wide emulsion fit

The supplier states it works in oil-in-water and water-in-oil products.

Where It Is Used

Use it in firming serums, eye creams and night creams. It pairs well with Palmitoyl Tripeptide-1 and Palmitoyl Tetrapeptide-7 peptide solution and Palmitoyl Pentapeptide-4 peptide solution. Browse the full peptides category for other collagen peptides.

How to Use

Add the solution after the emulsion has formed and cooled to 40°C (104°F) or lower. The recommended use rate is 0.5 to 5%. Keep the raw material refrigerated until it goes into a properly preserved product.

Compatibility and Technical Notes

The supplier changed vendors on 2026-10-23, so check the current specification sheet for any changes before you repeat an older recipe. This is a raw cosmetic ingredient for cosmetic use only.

Characteristics

INCI: Glycerin, Butylene Glycol, Water, Propanediol, Tetrapeptide-21, Ethylhexylglycerin, Benzoic Acid. CAS number: Mixture (as stated by supplier). Appearance: clear, colorless liquid. Solubility: water soluble. pH: raw material 3.0 to 5.5. Recommended use level: 0.5 to 5%. Shelf life: 24 months from the date of manufacture.

Storage

Store in a cool, dry place. Long-term storage under refrigeration at 4°C (39.2°F) is recommended.

FAQ

What is the use rate?

0.5 to 5% of the finished product.

When do I add it?

After the emulsion has cooled to 40°C or lower.

Does the INCI change?

Yes. The supplier switched vendors in October 2026; the current INCI is shown above.