C-Tetra daily vitamin C serum fights visible signs of ageing and restores the skin's glow with a powerful antioxidant combination of vitamin C and E, fighting the damage caused by the sun and pollution. Its lightweight formula encourages the production of collagen and elastin which help to reduce fine lines and wrinkles along with visibly brightening the complexion and balancing skin tone. By using tetrahexyldecyl ascorbate as a lipid-soluble form of vitamin C, the serum sinks deep into the skin, protecting it against free radicals with no irritation. As C-Tetra has a water-free formula, the vitamin C will not degrade over time. This means the formula stays highly potent from the first to the last drop. Enriched with nourishing, pampering oils and the anti-ageing power of vitamin C, this quick-absorbing vitamin C serum is suitable for those wanting skin rejuvenation. Suitable for those new to vitamin C or those wanting to upgrade from C-Tetra Cream or Daily Radiance Vitamin C.