Vitamins C is essential for good oral health and especially for helping your body to maintain healthy gums. One of its main roles is to help the body manufacture collagen. Collagen is found in connective tissues and particularly in gums. It helps to maintain strong and healthy gum tissue, forming a barrier against infection and disease while promoting wound healing. Vitamin C also supports your immune system, producing antibodies that help fight infections including gum disease. Your body cannot manufacture vitamin C and you must obtain it through food. Good sources include citrus fruits and berries, as well as vegetables such as broccoli, Brussels sprouts and red peppers.