Methylated B Vitamins are the vitamins that have undergone DNA methylation. In actuality, several B vitamins contribute to both methylation and detoxification. Among these B vitamins are B12 and folate. Every vitamin plays an essential role inside the body. As for B12, a lack of it can lead to developing gum problems. A dentist (follow this link) can also help work out your B12 and other vitamin deficiencies to address the oral problem as well.