Beta-carotene in serum test using high-performance liquid chromatography (HPLC) is a test aimed at measuring beta-carotene levels, which is a type of carotenoid considered a powerful antioxidant. Beta-carotene plays an important role in eye, skin, and immune health, and also contributes to its conversion into vitamin A in the body. This test is used to assess the nutritional status of individuals, especially those who have vitamin deficiencies or health problems affecting nutrient absorption. The results help guide dietary and treatment choices.