Tripeptide-21 Peptide Solution

Tripeptide-21 Peptide Solution is a liquid peptide ingredient for leave-on serums, creams and lotions positioned around the appearance of firmness and skin texture. The ready liquid form makes it simple to add to the water phase of a skin-care product. Seven sizes are offered, from a 10 mL sample through 1 oz, 4 oz, 8 oz, 16 oz and 32 oz up to 1 gal (3.78 L).

What Is Tripeptide-21 Solution?

Tripeptide-21 is a peptide supplied here in solution for cosmetic product development. The card does not give INCI details beyond the peptide name or a use level, so take the complete composition and recommended level from the batch documentation for the lot you receive.

Properties

Firmness appearance

The peptide is chosen for products aimed at a firmer-looking complexion.

Skin texture

It also fits products focused on a smoother, more even-looking surface.

Liquid format

No weighing of fine powders; measure the solution straight into the batch.

Applications

Typical uses are face serums, day and night creams, and lotions. Many developers combine several peptides in one product, for example with Palmitoyl Pentapeptide-4 Peptide Solution or Matrixyl 3000 Peptide Solution. Discover more liquids in the peptides category.

How to Use

Add the solution to the water phase at the level stated in the batch documentation. Mix until uniform, then confirm pH, preservation and stability in the finished product before scaling up. For more detail, read our guide How to Stack Peptides in a Serum: 2026 Guide.

Compatibility

When combining it with other peptides or actives, prepare a small pilot and observe appearance and texture over several weeks.

Which size to order

The 10 mL sample is ideal for first trials. The 1 oz and 4 oz bottles serve development and small runs, while 8 oz to 1 gal suit brands that already have a Tripeptide-21 product in production.

Documentation first

Because the card does not list INCI details or a level, request the documents for your lot before planning a launch. Having them early also helps when you prepare your own product file.

Characteristics

Name: Tripeptide-21 Peptide Solution. Form: liquid. Focus: appearance of firmness and skin texture. Sizes: 10 mL sample, 1 oz (30 ml), 4 oz (118 mL), 8 oz (236 mL), 16 oz (473 mL), 32 oz (946 ml), 1 gal (3.78 L).

Recipe: Texture Serum Base (60 g)

Ingredients: 18 g hyaluronic acid gel and 42 g distilled water. Stir the gel into the water until smooth. Tripeptide-21 Peptide Solution goes in at the amount given in the batch documentation; the card has no level, so no gram amount appears in this recipe. Fill into a dropper bottle. The base is water-based, so preserve it with a tested system or prepare it fresh in small quantities.

Pairing ideas

Tripeptide-21 fits well in multi-peptide serums where each liquid brings its own focus, for example one peptide for firmness appearance and another for a smoother look. Keep the total of liquid actives in check by weighing every addition in grams and noting it on the batch sheet. A record like this makes a later scale-up from a 60 g pilot to a full run predictable and easy to reproduce.

Storage

For Tripeptide-21, follow the storage conditions set out in the lot documentation.

Begin with the 10 mL sample and see how Tripeptide-21 fits your line.

FAQ

What is Tripeptide-21 used for?

Serums, creams and lotions positioned around firmness appearance and skin texture.

Which sizes are available?

Seven, from a 10 mL sample to 1 gal (3.78 L).

What use level should I choose?

The card lists none; follow the batch documentation.

Is it a liquid or a powder?

A liquid peptide solution.