For people deficient in Vitamin D, or those who may not be getting sufficient Vitamin D in their diets, supplementation can be a great option. (ora.organic)
It is intended to complement other existing approaches to address the devastating impact of vitamin A deficiency, a condition that results from the lack of sufficient vitamin A in the body. (irri.org)
Accordingly, he advocates eating large amounts of colored vegetables containing beta carotene and either sunlight or D3 supplements as needed to provide sufficient Vitamin D stores. (westonaprice.org)