Gingivitis is a form of periodontal disease defined as chronic inflammation of the gums. Infection invades the tissues of the gums and the periodontal ligaments and even the alveolar bone where the teeth attach. One of the most proven ways to protect your gums from periodontal disease is to use vitamin C supplements. Vitamin C is a powerful antioxidant. It helps to reduce binding agents to protect cells and reduce bacteria to eradicate oxidants and strengthen the immune system.