The Medik8 C-Tetra Lipid Vitamin C Radiance Serum is a full-size product sealed in a 30ml bottle, formulated with hyaluronic acid as its main active ingredient. Specifically designed for the face, this serum is perfect for achieving a radiant complexion. With a period after opening of 12 months, this product is ideal for those looking to improve their skin's brightness and hydration. The Medik8 brand is known for its quality skincare products, making this serum a reliable choice for those seeking a potent anti-ageing solution.