Polarized Light Microscopy Digital Image Gallery

Beta-Carotene

Humans and many other animals absorb beta-carotene from food sources through the walls of the small intestine, where it is converted enzymatically to vitamin A, or retinol. Retinol, initially identified in 1920, was the first recognized vitamin, resulting in its being dubbed with the moniker vitamin A under an alphabetical nomenclature system. The important polyene biochemical is believed to promote good vision, dental health, and bone growth, as well as healthy skin, hair, and mucous membranes. The amount of vitamin A believed to be required by the human body on a daily basis, however, is relatively small (1.0 milligrams), and can be provided by the intake of approximately 6.0 milligrams of beta-carotene.


© 1995-2013 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Thursday, Nov 20, 2003 at 03:51 PM
Access Count Since November 20, 2003: 6415
Microscopes provided by:
Visit the Nikon website. Visit the Olympus Microscopy Resource Center website.