Bleeding gums can be caused by several factors, including gum disease, over-brushing, hormonal changes, and vitamin deficiencies. One of the most common vitamin deficiencies associated with bleeding gums is a lack of vitamin C. Vitamin C is essential for healthy gums, and low levels of this vitamin can cause bleeding gums and other gum-related issues. A study published in Nutrition Reviews found that low vitamin C levels in the bloodstream were associated with an increased risk for gum bleeding with gentle probing, and increasing vitamin C intake may help resolve the problem. Therefore, consuming foods rich in vitamin C, such as oranges, broccoli, and potatoes, or taking a vitamin C supplement may help prevent bleeding gums caused by a vitamin C deficiency. If you have recurring bleeding gums, it is important to see your dentist to determine the underlying cause and receive appropriate treatment.