Healthy teeth are important for overall health and appearance. In this context, the trace element selenium plays a protective role in dental health through the immune system, regulation of inflammation, and its function as an antioxidant that protects cells and tissues from damage caused by oxidative stress. Selenium supplementation may therefore be a promising therapy for improving dental health and as part of the treatment of periodontal disease and other dental conditions, according to a review article published in the Journal of Trace Elements in Medicine and Disease. There are also indications that additional supplementation with Q10 may improve the effect on dental health.

Most studies of vitamin D, dental health, and caries have focused on children and teenagers. According to a population study published in Nutrients, however, older people also depend on having sufficient amounts of vitamin D to maintain healthy teeth and prevent caries. The authors mention that it is important to have optimal vitamin D status in the blood, but the official guidelines for vitamin D are no guarantee of reaching that level.