Vitamin C is one of the holy grail ingredients that works wonders for all skin types and ages. Vitamin C is best known for making your skin look brighter, but it also helps protect your skin from environmental stressors and improve any visible signs of aging. This star vitamin does a lot of good things for your skin. It is also an important nutrient that helps repair damaged tissue, especially those caused by the sun. Vitamin C is also known as "ascorbic acid" and "L-ascorbic acid" in the skin care world, and you can find it on the ingredients list of many Korean skin care products. Vitamin C is a powerful antioxidant that also helps the body's skin make collagen, which is important for keeping the skin firm and looking young.