This document discusses the role of diet and nutrition in dental caries (tooth decay). It states that carbohydrates play a major role in causing dental caries. Added sugars are particularly problematic if good oral hygiene is not maintained. While vitamins D and K can help support dental health, fluoride also plays an important role in preventing decay when found in sources like milk, meat, breads and cereals. The document advises limiting foods high in fat and sugars to reduce risks of dental caries.