Vitamin A is an organic vitamin that is important for immune system maintenance as well as cell growth and development . Vitamin A is a broad group of related nutrients that includes retinoids (found in animal foods) and carotenoids (found in plant foods) . Retinoids are active components of Vitamin A which may contribute to embryogenesis, reproduction, vision, growth, inflammation, proliferation, and apoptosis . Many forms of Vitamin A are not synthesized in the body, hence the importance of a well-rounded diet or supplementation .
Where to Purchase
How to take
With a Meal on an As-Needed Basis
1000 – 5000 IU per serving
1. Mora, J. R., Iwata, M., & von Andrian, U. H. (2008). Vitamin effects on the immune system: vitamins A and D take centre stage. Nature Reviews Immunology, 8(9), 685-698.
2. Prietl, B., Treiber, G., Pieber, T. R., & Amrein, K. (2013). Vitamin D and immune function.Nutrients, 5(7), 2502-2521.
3. Trumbo, P., Yates, A. A., Schlicker, S., & Poos, M. (2001). Dietary reference intakes: vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium, and zinc. Journal of the American Dietetic Association, 101(3), 294-301.
4. Barber, T., Esteban-Pretel, G., Marín, M. P., & Timoneda, J. (2014). Vitamin A deficiency and alterations in the extracellular matrix. Nutrients, 6(11), 4984-5017.
5. Mukherjee, S., Date, A., Patravale, V., Korting, H. C., Roeder, A., & Weindl, G. (2006).Retinoids in the treatment of skin aging: an overview of clinical efficacy and safety.Clinical interventions in Aging, 1(4), 327.
6. Wu, K., Kim, H., Rodriquez, J. L., Hilsenbeck, S. G., Mohsin, S. K., Xu, X., et al. (2002).Suppression of mammary tumorigenesis in transgenic mice by the RXR-selective retinoid, LGD1069. Cancer Epidemiology Biomarkers & Prevention, 11(5), 467-474.