A vitamin C derivative serum that helps to achieve radiant, healthy-looking skin. Can be used on sensitive skin and absorbs into the skin without leaving any sticky or oily residue. – Primary Skin Irritation Test – Primary Skin Irritation Test for Sensitive Skin – Triple Skin Tone(brightness, yellowness, uniformity) Test – Pigmentation(melasma, blemish, freckle) Test – Skin surface(smooth texture) Test – Skin density(tightness, firmness) Test – Fine Line(perceptible wrinkle)Test – Antioxidant(DPPH radical scavenging activity) Test – Hydration filling Test