Vitamin D Is Important For Dental Health: Vitamin D deficiency or insufficiency can affect your child’s tooth enamel and gum health "Vitamin D plays a significant role in keeping your teeth healthy—according to a 2020 article, Vitamin D Deficiency and Oral Health: A Comprehensive Review, vitamin D deficiencies can lead to several oral health disorders, like gingival inflammation, cavities, and gum disease." (reference: cogate.com)