Vitamin C (ascorbic acid) is an essential water-soluble vitamin. Vitamin C has antioxidative properties and has traditionally been used to prevent colds. Because vitamin C works as an antioxidant, it prevents damage from free radicals. Vitamin C performs several functions in the body. One of its important functions is to produce collagen, an important protein for skin, bones, tendons, and blood vessel walls. Vitamin C plays an integral part in the production of dopamine and adrenaline, and therefore affects your mood, the sense of happiness and joy. Vitamin C deficiency can lead to health issues like bleeding gums, nose-bleeding, colds, skin problems, allergies, fatigue, and poor wound healing. Severe deficiency can lead to potentially deadly disease scurvy. People who exercise a lot, stress a lot, or are exposed to a lot of free radicals, like smokers and breastfeeding women, have an increased need of vitamin C. There are no known severe risks with overdosing vitamin C, although doses of several grams can lead to loose bowels. Vitamin C is found naturally in berries, fruits, and vegetables, but smaller amounts can also be found in some animal products. In our opinion, the best vitamin C is Vitamin C-400 from Innate Response which contains all cofactors needed for optimal intake.