Magnesium Ascorbyl Phosphate
Also known as: MAP, Magnesium Ascorbyl Phosphate, INCI: Magnesium Ascorbyl Phosphate
Stabilized vitamin C derivative that brightens skin and supports collagen without the instability of pure ascorbic acid.
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Get the appWhat it does
A water-soluble form of vitamin C that penetrates skin to provide antioxidant protection and stimulate collagen synthesis. Unlike L-ascorbic acid, MAP is significantly more stable, remaining effective across a wider pH range and with longer shelf life. It converts to ascorbic acid in the skin for brightening and anti-aging benefits.
Benefits
- Brightens dull skin and evens tone with consistent use
- Supports collagen production for firmer appearance
- Provides antioxidant protection against environmental stressors
- More stable than L-ascorbic acid; longer-lasting efficacy
- Suitable for sensitive or compromised skin barriers
Who it suits
- All skin types
- Dull or uneven skin tone
- Mature or aging skin
- Sensitive skin (more gentle than L-ascorbic acid)
How to use
Apply to clean skin in serums or moisturizers, typically at 5–10% concentration. Use daily, morning or evening; can be layered under sunscreen.
Pairs well with
Niacinamide, Hyaluronic acid, Vitamin E, Ferulic acid
Be careful pairing with
none notable
Safety & cautions
Generally well-tolerated, but may cause mild irritation at high concentrations in sensitive individuals. Effectiveness is lower than L-ascorbic acid; typical efficacy range is 5–10% concentration.
Educational information, not medical advice. Concentration and formulation change how an ingredient behaves.