https://www.webmd.com/oral-health/news/20000927/keep-that-smile-calcium-vitamin-d-prevent-tooth-loss
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3472001/
https://www.sciencedaily.com/releases/2012/11/121127130321.htm
https://pubmed.ncbi.nlm.nih.gov/16295569/
https://saude.abril.com.br/bem-estar/7-problemas-que-a-periodontite-pode-causar-no-resto-do-corpo/