The disease caused by a deficiency of vitamin C is scurvy. This condition occurs when the body lacks sufficient vitamin C (ascorbic acid), which is essential for the synthesis of collagen, a crucial protein for maintaining connective tissues, skin, and blood vessels. Symptoms of scurvy include fatigue, swollen gums, joint pain, and anemia. Scurvy can also lead to more serious health complications if left untreated. It is typically preventable and treatable through dietary changes, as vitamin C is abundant in fruits and vegetables, especially citrus fruits, strawberries, and bell peppers.