The ISDIN Isdinceutics Retinal Intense Serum is a night serum formulated with retinaldehyde, a derivative of Vitamin A, to target fine lines, wrinkles, and uneven skin tone. It’s designed to accelerate skin renewal, improve texture, and promote a smoother, more radiant complexion. The serum’s two-phase formula combines a light, oil-based phase with a soothing aqueous phase to optimize effectiveness and minimize irritation