Vitamin D2 is commonly used as a dietary supplement to prevent or treat vitamin D deficiency, particularly in individuals who have limited sun exposure or dietary intake. It is also prescribed to manage conditions like rickets, osteomalacia, and osteoporosis, as it aids in calcium absorption and supports bone health. In some cases, it is used in conjunction with other medications to treat hypoparathyroidism and certain types of kidney disease. Additionally, Vitamin D2 is sometimes incorporated into fortified foods, such as milk and cereals, to enhance their nutritional value. It is also utilized in clinical settings to address vitamin D insufficiency in patients with malabsorption syndromes or those on specific medications that interfere with vitamin D metabolism.