How Dentist Remove Cavity and Stains from Teeth In the 1930s, a study trusted Source claimed that vitamin D deficiency causes cavities in the diet, which became the basis for many home remedies today. Although it is true that not receiving enough vitamin D may make teeth more vulnerable to cavities, we now realize that this is just one piece of the picture. Other variables that increase the likelihood of developing cavities are as follows: having a dry mouth …