References
- ^Institute of Medicine (US) Panel on MicronutrientsDietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc
- ^Vitamin A and Carotenoids: Fact Sheet for Consumers; Bethseda, MD: National Institutes of Health Office of Dietary Supplements; last updated August 2022; cited December 2023(2022 Aug)