Vitamins and minerals play an important role in periodontal health. Certain nutritional deficiencies can impair the body's immune response and ability to fight off bacterial infection in the gums. Adequate intake of vitamins A, C, D, B-complex, protein, and minerals like calcium is important for periodontal health as they support collagen production, bone health, immune function, wound healing and other processes involved in maintaining a healthy periodontium. Nutritional deficiencies have been linked to increased risk of periodontal disease and its progression. Maintaining good nutrition supports the body's natural defenses against periodontal bacteria.