I. Basic Information
• INCI Name: MAGNESIUM ASCORBYL PHOSPHATE
• Common Commercial Form: White or off-white powder
• Solubility: Water-soluble, which is a key difference from lipophilic VC-IP and oil-loving EAC.
• Stability: Extremely high. As a phosphate derivative of vitamin C, its stability to light, heat, and oxygen is far superior to that of native vitamin C.

Core Advantages and Features
1. Excellent Stability
• One of the main advantages of MAP is its outstanding chemical stability. It is not easily oxidized and discolored in formulations, greatly extending the product's shelf life and reducing the difficulty and cost of formulations and packaging (no need for strict light-shielding or vacuum conditions).
2. Significant Mildness
• MAP can effectively work in a near-neutral pH environment, completely avoiding the stinging and irritation caused by the low pH environment (~3.5) required by原型维C (ascorbic acid).
• It slowly releases active vitamin C through enzymatic degradation on the skin, resulting in a smooth and gentle action process, so it is widely regarded as a vitamin C component suitable for sensitive skin.
3. Clear Whitening and Brightening Effects
• After being absorbed by the skin, MAP decomposes and releases pure L-ascorbic acid (vitamin C), which effectively inhibits the activity of tyrosinase, a key enzyme in melanin production.
• Therefore, it has clear effects in brightening overall skin tone, fading spots and acne scars, and is a core component in many whitening serums and lotions.
4. Antioxidant and Anti-aging
• The released vitamin C is a powerful antioxidant that can neutralize free radicals, combat photoaging, and prevent wrinkle formation.
• At the same time, it is an essential cofactor for collagen synthesis, and long-term use helps improve skin elasticity and firm the skin.
5. Potential Hydrating and Soothing Effects
• Some studies and clinical observations suggest that MAP may have certain hydrating effects and can help improve mild skin inflammation and redness, which is an additional benefit for sensitive and dry skin.