Eating habits describe the types and quantities of food that an individual or a group of individuals regularly consumes, as well as how often they drink. Healthy dietary practises have an impact on dental health. The future embryo's development, including the growth of the maxilla, the formation of the skull and face, and dental organogenesis, is impacted by a lack of vitamins and minerals during the preconception period. Understanding how nutrition and eating habits affect both children's and adults' caries rates is necessary to improve oral health. Lack of vitamin A, C, E, and folate all has a detrimental effect on periodontal health. Throughout the early phases of embryonic development, folate is crucial. Oral cancer is most common in people who smoke, chew tobacco, or consume alcohol. Changing one's nutrition can have a significant impact on one's health throughout one's life, both positively and negatively. Food consumption must be improved in order to minimise the incidence of oral and pharyngeal cancer. The primary sources of vitamins and fibre are fruits, vegetables, and grains, thus a daily meal should have an appropriate quantity of each. By giving folate during the first trimester of pregnancy and in the months leading up to conception, the likelihood of nervous system abnormalities is reduced. Chewing gum and other xylitol-containing products have significantly decreased dental cavities, and they provide tempting alternatives for people who are most at risk. The aim of this study is to review the evidence suggesting link between diet, nutrition, and oral health and to provide dietary advice for the prevention of oral diseases.