Cos-IQ 20% Vitamin C Serum, 30ml is a high-strength brightening and anti-aging formula designed to transform dull, tired-looking skin into a radiant, youthful complexion. Powered by 20% Vitamin C in the advanced 3-O-Ethyl Ascorbic Acid form, this serum delivers powerful results while remaining stable and effective on the skin.

With consistent use, Cos-IQ 20% Vitamin C Serum, 30ml visibly improves the appearance of fine lines, wrinkles, and loss of firmness. It supports collagen production, helping the skin feel firmer, smoother, and more resilient. The potent concentration works to brighten the complexion, reduce dullness, and promote a naturally healthy glow.

Formulated with ethylated ascorbic acid, one of the most effective and stable forms of Vitamin C, Cos-IQ 20% Vitamin C Serum, 30ml penetrates deeply to target uneven skin tone and blemishes. It helps fade dark spots, refine texture, and enhance overall radiance, giving the skin a luminous and refreshed appearance.