Experience transformation with the Medik8 Pack C-Tetra 30ml + Crystal Retinal 6 30ml serum. It combines the antioxidant C-Tetra to fight free radicals with the powerful retinol Crystal Retinal 6, stimulating cell renewal. Achieve rejuvenated skin, reducing fine lines and promoting radiance. Ideal for a revitalizing routine. Instructions for use For best results, apply Medik8 Pack C-Tetra Serum in the morning to clean, dry skin. Then, apply Crystal Retinal 6 in the evening. Apply a small amount and gently massage onto face and neck. Follow with your daily skincare routine. Avoid contact with eyes.