Which vitamin is most commonly low in individuals with a restricted diet?

Individuals with a restricted diet often exhibit low levels of Vitamin B12, which primarily occurs in those who may limit or eliminate animal products from their nutrition. Vitamin B12 is predominantly found in animal-based foods, such as meat, fish, eggs, and dairy products. Therefore, individuals who follow vegetarian or vegan diets without adequate supplementation are particularly at risk for Vitamin B12 deficiency.

This vitamin is crucial for numerous bodily functions, including DNA synthesis, red blood cell formation, and maintaining proper neurological function. A deficiency can lead to serious health issues, including anemia and neurological disorders. Since a restricted diet often lacks the variety of food necessary to provide adequate nutrient intake, Vitamin B12 is one of the most commonly observed deficiencies in such individuals.

This highlights the importance of including sufficient sources of Vitamin B12 or appropriate supplementation in restricted diets to promote optimal health.