Vitamin C is key to collagen synthesis in skin cells. As one of skin’s natural filler substances, collagen gives young skin its firm structure and even appearance but degrades over time. Much of this degradation is caused by free radicalswhich damage the cells that produce collagen. Vitamin C is also a powerful anti-oxidant and helps to protect skin from free radical damage. This lip balm contains active ingredients including Licorice extract, to help reduce redness and calm irritation, whilst evening primrose oil helps to regenerate the lips' natural protective barrier. Panthenol and Glycerol help to promote healing, and intensively moisturises the lips and surrounding area to leave them feeling soft and smooth.

The human body cannot produce Vitamin C itself and so relies on external sources, the most common of which are dietary sources such as citrus fruits. Vitamin C is also an effective ingredient in skincare where it strengthens and ultimately protects the epidermis, keeping skin looking radiant and fresh. One of its forms, L-ascorbic acid, is more active and more widely researched and proven as a skincare ingredient than others. Eucerin uses L-ascorbic acid in Eucerin Hyaluron-Filler Vitamin C Booster.Another form of Vitamin C, Sodium Ascorbyl Phosphate, is more suitable for a lip care product and is used in Eucerin Aquaphor SOS Lip Repair.Vitamin C (also known as ascorbic acid and L-ascorbic acid although these are actually different forms of the vitamin) is an essential nutrient to our overall health and the health of our skin. Clinical tests across a two-week controlled usage period resulted in a significant improvement of symptoms such as dryness, itching and burning, along with very good skin tolerability.