Editing Retinol (section)

===Dietary intake===
The [[Dietary Reference Intake]] (DRI) Recommended Daily Amount (RDA) for vitamin A for a 25-year-old male is 900 micrograms/day, or 3000 IU. [[National Health Service]] daily recommended values are slightly lower at 700 micrograms for men and 600 micrograms for women.<ref>{{cite web|date=23 October 2017|title=Vitamins and minerals - Vitamin A|url=https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-a/|access-date=18 February 2023|website=nhs.uk|language=en}}</ref>

During the absorption process in the [[intestine]]s, retinol is incorporated into [[chylomicron]]s as the ester form, and it is these particles that mediate transport to the [[liver]]. Liver cells store vitamin A as the ester, and when retinol is needed in other tissues, it is de-esterifed and released into the blood as the alcohol. Retinol then attaches to a serum carrier, [[retinol binding protein]], for transport to target tissues.<ref>{{cite journal | vauthors = Amengual J, Zhang N, Kemerer M, Maeda T, Palczewski K, Von Lintig J | title = STRA6 is critical for cellular vitamin A uptake and homeostasis | journal = Human Molecular Genetics | volume = 23 | issue = 20 | pages = 5402–5417 | date = October 2014 | pmid = 24852372 | pmc = 4168826 | doi = 10.1093/hmg/ddu258 }}</ref> A binding protein inside cells, cellular retinoic acid binding protein, serves to store and move retinoic acid [[intracellular]]ly.