Peptides

Pentapeptide-28

INCI: PENTAPEPTIDE-28

Reviewed by Kate · Last updated 14 Aug 2026

A peptide that supports skin's structural integrity and conditioning

Best For Skin Types

All, Dry, Mature

Addresses

Dryness, Hydration, Fine lines

Usage Frequency

Daily

What Is Pentapeptide-28?

Pentapeptide-28 is a short chain peptide—a molecule composed of five amino acids linked together. Peptides are fragments of proteins, and in skincare they function as signalling molecules that communicate with skin cells to support various biological processes.

In formulations, pentapeptide-28 is primarily used as a skin conditioning agent. Its role is to help maintain skin hydration and support the skin's natural moisture barrier, contributing to a smoother, more supple appearance.

How It Works

Peptides like pentapeptide-28 work by signalling to skin cells, encouraging them to maintain optimal hydration and support structural proteins. As a conditioning agent, it helps seal moisture into the outer layers of the skin and may reinforce the skin barrier's ability to retain water.

The peptide's small molecular size allows it to penetrate the outer layers of skin more readily than larger protein molecules, potentially allowing it to interact with cells more effectively.

Clinical Evidence & References

Research on peptides in general supports their role in skin conditioning and barrier support. Studies on skin ageing indicate that loss of collagen and skin hydration are significant factors in visible signs of ageing, and peptides are thought to help address these concerns by supporting the skin's structural proteins and moisture balance.

Specific clinical data on pentapeptide-28 alone is limited in published literature. Most evidence for peptide efficacy comes from broader research on peptide classes and their mechanism of action rather than individual peptides. More targeted studies would help clarify its specific benefits and optimal concentration ranges.

How to Use

Pentapeptide-28 is typically found in serums, moisturisers, and creams. Use it as part of your regular skincare routine, applying it to clean skin before heavier moisturisers. It can be used daily, morning and evening, and layers well with other skincare ingredients. There is no need to use it in isolation; it complements other conditioning and hydrating ingredients effectively.

Safety & Precautions

Peptides are generally well-tolerated and considered low-risk ingredients in skincare. Pentapeptide-28 is unlikely to cause irritation for most skin types, though those with very sensitive skin may wish to patch-test first.

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