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MAGNESIUM ASCORBYL PHOSPHATE.

Valuable CAS 114040-31-2 --- 113170-55-1 / ANTIOXIDANT, SKIN CONDITIONING

Magnesium Ascorbyl Phosphate (MAP) is a stable, water-soluble derivative of Vitamin C, distinguished by its potent antioxidant and skin-brightening capabilities. It actively supports collagen synthesis and effectively targets hyperpigmentation, making it a well-tolerated and versatile ingredient for comprehensive skin health.

Summary

antioxidant skin conditioning skin brightening collagen booster anti-inflammatory photoprotection improves skin hydration

Science

Mechanism of Action

MAP functions as a powerful antioxidant, actively neutralizing free radicals to shield the skin from oxidative stress and environmental damage. It stimulates collagen synthesis, thereby enhancing skin elasticity, improving firmness, and reducing the appearance of fine lines and wrinkles. By inhibiting the tyrosinase enzyme, MAP effectively suppresses melanin production, contributing to the fading of dark spots, sun damage, and hyperpigmentation, resulting in a brighter, more uniform skin tone. Additionally, it offers anti-inflammatory benefits to soothe irritation, reduces redness, and supports skin hydration by strengthening the natural barrier function and boosting ceramide synthesis, while also providing photoprotection against UV damage.

Research

Clinical Evidence

High confidence
Effective range 1–10%
Optimal

3%

Key findings

  1. 01 Clinical data indicates that concentrations between 3% and 10% are effective for promoting skin brightening, delivering antioxidant benefits, and stimulating collagen production.
  2. 02 A 10% concentration has demonstrated efficacy in inhibiting melanin production, specifically addressing hyperpigmentation.
  3. 03 Studies show that concentrations from 1% to 8% provide significant antioxidant and skin-lightening effects without inducing irritation.
  4. 04 A 5% concentration, when combined with 10% nicotinamide and 5% hyaluronic acid, achieved progressive improvements in facial melasma, proving to be safe and well-tolerated.
  5. 05 A 3% concentration is frequently recommended for optimal performance within formulations.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 6 – 8
0 7 14

Stability

MAP exhibits high stability as a Vitamin C derivative, resisting oxidation from light, heat (tolerates 80°C/176°F for up to 20 hours), and air, which ensures a significantly longer shelf life compared to L-Ascorbic Acid. For maximum stability and efficacy, a final formulation pH between 7.5 and 8 is often suggested, though it is stable across a broader pH range of 6.0-8.0. Discoloration may occur in formulations with a pH below 6.

Synergies

  • Enhanced efficacy in treating facial melasma when formulated with nicotinamide and hyaluronic acid.

Conflicts

  • Highly acidic products (e.g., pure L-Ascorbic Acid, strong exfoliants)
  • Metal ions (mitigated by adding 0.05% Disodium EDTA)

Safety

Safety Profile

CIR Status
Safe as used
Max tested
10%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded in 2005 that Magnesium Ascorbyl Phosphate is safe for use in cosmetic products, a conclusion reaffirmed in 2024. MAP is considered non-toxic and generally safe, with a low potential for adverse effects, although patch testing is recommended for individuals with sensitive skin.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Magnesium Ascorbyl Phosphate is a highly stable and well-tolerated vitamin C derivative, prized for its versatile antioxidant, brightening, and collagen-boosting properties across a wide range of skin types.

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