Lancasteru0027s broadest-spectrum photoaging protection, Lancaster Sun Perfect Unifying Serum SPF50 works to reverse visible signs of ageing to reveal a luminous and younger-looking complexion. Protecting your skin from UVB and UVA rays, visible light, and infrared rays, the Full Light Technology and Sun Repair System shield your skin from 100% of the sun spectrum (No sunscreen product can provide full protection against suns rays. Over-exposure to the sun is a serious health threat) and help repair sun-induced damage. With the added benefits of niacinamide and vitamin C, this ultra-light, and moisturising serum also targets dark spots and wrinkles.To use: Dispense a few drops of the serum onto fingertips and dab gently into skin. Massage gently into the face until the serum is absorbed. Apply in the morning before sun exposure.