Bleeding gums is a warning sign that you may have periodontal disease, or some other serious health condition. In most cases, intermittent bleeding of the gums is due to excess plaque buildup on the teeth at the gum line. However, you gums may also bleed if you are not getting enough L-lysine, an essential amino acid. L-lysine is not made in the body and must be supplied from the foods you eat. A lysine deficiency can affect the way vitamin C is used and cause anemia and other health issues that may lead to gingivitis.Read more.