Peptides

Ascorbyl Phosphate Succinoyl Pentapeptide-12

INCI: ASCORBYL PHOSPHATE SUCCINOYL PENTAPEPTIDE-12

Reviewed by Rosie · Last updated 14 Aug 2026

Also known as: Ascorbyl Phosphate Succinoyl Pentapeptide-12

A stabilised vitamin C derivative combined with peptide technology for antioxidant support

Best For Skin Types

All, Mature, Combination

Addresses

Fine lines, Hyperpigmentation, Antioxidant protection

Usage Frequency

Daily

What Is Ascorbyl Phosphate Succinoyl Pentapeptide-12?

Ascorbyl phosphate succinoyl pentapeptide-12 is a hybrid ingredient that pairs a stabilised form of vitamin C (ascorbyl phosphate) with a short chain peptide (pentapeptide-12). Vitamin C derivatives are chosen in skincare because pure ascorbic acid is notoriously unstable; this formulation aims to provide oxidative protection whilst maintaining greater shelf stability than its parent compound.

The pentapeptide component is a signalling molecule designed to communicate with skin cells. Together, these two elements work as an antioxidant and potential skin-conditioning agent, though this particular combination is relatively specialised and appears in a limited range of formulations.

Benefits for Your Skin

How It Works

The ascorbyl phosphate component functions as an antioxidant by donating electrons to unstable free radical molecules, stabilising them before they can damage skin cells or collagen. This is thought to help protect against environmental stressors such as UV exposure and pollution.

The pentapeptide-12 acts as a signalling molecule, communicating with skin cells to support natural maintenance functions. Peptides are believed to stimulate cellular activity and support structural proteins, though the exact mechanism varies depending on the specific peptide sequence and skin depth penetration.

Clinical Evidence & References

Vitamin C derivatives, as a category, have a reasonable evidence base for antioxidant activity and some studies suggest potential benefits for brightening and fine line appearance. However, evidence specific to this exact combination (ascorbyl phosphate succinoyl pentapeptide-12) is limited, and clinical data on its efficacy in real-world formulations is sparse.

Peptides in general show promise in skincare, but results depend heavily on molecular weight, formulation stability, and whether they can penetrate the stratum corneum effectively. This particular formulation would benefit from more independent clinical evaluation to establish its practical benefits in finished products.

How to Use

Use as directed by the product manufacturer, as efficacy depends on concentration, pH, and formulation stability. If combining with other active ingredients (such as niacinamide or retinoids), introduce gradually to monitor skin tolerance. Store the product in a cool, dark place or as instructed to preserve the stability of the ascorbyl phosphate component, which can degrade when exposed to light, heat, or air.

Safety & Precautions

Ascorbyl phosphate derivatives are generally well-tolerated across most skin types. As with any vitamin C product, some individuals may experience mild irritation or sensitivity, particularly if used at high concentrations or combined with other active ingredients; start with lower frequency if new to the ingredient.

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