Thymulen 4 Peptide

Thymulen 4 at a glance

Thymulen 4 Peptide is a cosmetic solution of Acetyl Tetrapeptide-2, CAS 757942-88-4. It is used in firming and elasticity leave-on products: serums, creams and neck care aimed at skin that looks less firm and less bouncy. The full vehicle INCI is confirmed on the CoA for each lot.

Trade name or INCI listing?

The catalog carries the same peptide under two listings. Thymulen 4 is the trade-name solution, and Acetyl Tetrapeptide-2 is the INCI-named listing. Formulators often buy the one named on their formula sheet. For new work, compare CoAs and choose by vehicle and documentation. Acetyl Tetrapeptide-5 is a different peptide, Acetyl Tetrapeptide-5, used for the eye contour.

Formulating with Thymulen 4

Process

Add the solution in the water phase during cool-down, below 40 °C, and mix gently. Avoid prolonged heat after addition.

Bases

Firming serums, rich day and night creams, and neck and décolleté creams are typical. In emulsions, add after cooling. Record pH and viscosity before and after addition. Take the use level from the supplier documentation for your lot.

Pairing ideas

Acetyl Tetrapeptide-2 pairs well with a matrikine such as Palmitoyl Tripeptide-1 + Palmitoyl Tetrapeptide-7 Liquid for a two-peptide firming cream. Hyaluronic acid and glycerin give a plump, comfortable finish. Add each peptide separately in cool-down and check compatibility in your base.

Claims

Keep claims cosmetic: firmer-looking, more elastic-feeling, smoother skin, and a more toned look on the neck and jawline. Avoid wording about immune function, which sometimes appears in older trade literature and is not a cosmetic claim.

Why choose a tetrapeptide

Short acetylated peptides like this one are water-soluble and easy to formulate, and their small size keeps the vehicle simple. That makes them flexible building blocks for multi-peptide serums.

Stability and storage

Run stability at room temperature and 40 °C in the final packaging, checking appearance, odor and pH. Store tightly closed, cool and away from light, and refrigerate opened material where practical.

Example: firming neck cream architecture

A neck cream might combine a light emulsion, glycerin, Thymulen 4 and a matrikine, each peptide added separately in cool-down, with a validated preservative. Exact levels come from the supplier documentation. A slightly richer texture than a face serum suits the neck and décolleté, where skin tends to feel drier.

Lot handling

Record appearance and pH on arrival and compare them with the CoA. Keep the CoA with your batch records so you can trace each finished batch back to its peptide lot.

Ordering

It ships from Florida, usually within 1 to 2 business days, in the pack sizes shown above, and US shipping is free on orders of $35 or more. Compare all peptide solutions.