Stay-C 50

Stay-C 50 is sodium ascorbyl phosphate, a stable, water-soluble vitamin C derivative for cosmetic use. It's used for antioxidant support and to refine the look of uneven tone and texture, with results dependent on concentration and formula.
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Ingredient Snapshot

Overview
A stable vitamin C form that brightens and evens out skin tone.
Category
Antioxidant, Brightening, Acne, Hyperpigmentation, Tone/Texture
Type
Antioxidant

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

It helps defend against environmental stressors while promoting a brighter, more even-looking complexion, and can support clearer-looking skin and a smoother appearance over time when well formulated.

Uses In Skincare & Cosmetics

It's often included in water-based serums, toners, gel moisturizers, and gentle cleansers targeting dullness and uneven tone.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

It's generally well tolerated with a lower sting risk than pure vitamin C due to higher formulation pH. Mild irritation is still possible in sensitive skin, so patch test if unsure. No widely recognized cosmetic-use restrictions apply.

Is Stay-C 50 a Good Ingredient?

It rates Good because sodium ascorbyl phosphate is a stable, water-soluble vitamin C derivative with peer-reviewed support for antioxidant effects and modest brightening and clarifying benefits when used at effective levels, and it's gentler than L-ascorbic acid, though not quite as potent.

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