Peptides

Sh-Polypeptide-45

INCI: SH-POLYPEPTIDE-45

Reviewed by Rosie · Last updated 14 Aug 2026

A peptide that supports skin conditioning and structural integrity

Best For Skin Types

All, Mature, Dry, Combination

Addresses

Fine lines, Dryness, Hydration

Usage Frequency

Daily

What Is Sh-Polypeptide-45?

Sh-Polypeptide-45 is a peptide—a short chain of amino acids—formulated to function as a skin conditioning agent. Peptides are naturally occurring compounds found throughout the body, where they play roles in skin structure and function. In skincare formulations, this ingredient is included to help maintain and support the skin's natural condition.

As a skin conditioning agent, Sh-Polypeptide-45 works at the surface and upper layers of the skin, helping to improve how skin looks and feels. Peptides in general have been studied for their role in supporting skin barrier health and firmness, though individual peptides vary in their specific effects.

How It Works

Peptides function by signalling to skin cells and supporting the maintenance of structural proteins. Sh-Polypeptide-45 operates as a humectant and conditioning agent, drawing moisture into the skin and creating a smoother surface texture.

The ingredient works primarily at the skin's surface and outer layers, where it can help optimise hydration and improve how skin appears to the eye. This conditioning action contributes to a more supple, resilient complexion over time.

Clinical Evidence & References

The research landscape for peptides in skincare is evolving. General studies confirm that peptides can support skin barrier function and collagen-related processes, which become increasingly important as skin ages and experiences gradual thinning of both the epidermis and dermis.

However, specific clinical evidence for Sh-Polypeptide-45 in particular is limited. Most peptide research focuses on their potential to support skin structure and firmness, particularly in mature or aged skin where collagen loss is a concern. More targeted research on this specific peptide would help clarify its individual benefits.

How to Use

Sh-Polypeptide-45 is typically found in serums, moisturisers, and treatment products. Apply to clean skin as directed by the product instructions, usually once or twice daily. Peptide-containing products can be layered with other skincare actives, though as with any new ingredient, introduce it gradually to monitor how your skin responds.

Safety & Precautions

Peptides are generally well-tolerated across most skin types. As with any ingredient, discontinue use if irritation or sensitisation occurs.

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