Faulding® Remedies Vitamin C 1000mg is a potent antioxidant that is essential for the proper function of the immune system. By supporting the activity of white blood cells and antibody response, Vitamin C can help to reduce the severity and duration of colds and assist in the management of mild upper respiratory infections. Vitamin C plays a vital role in many immune mechanisms. It aids, assists or helps with the maintenance or improvement of general well-being. Vitamin C improves iron absorption and is necessary for the synthesis of collagen which may assist in wound healing.