12 March 2008

Phytonutrient Flavenoids

In the article "Can Diet or Supplements Relieve Your Arthritis Aches and Inflammation?" The phrase phytonutrients like flavonoids caught my attention as I’d never heard of flavonoids before. Phytonutrients are simply components thought to promote human health that are derived from plants. Some commonly known phytonutrients are carotenoids such as alpha and beta carotene. Flavonoids are compounds also found in natural substances, but they are thought to have specifically have anti-oxidant properties. Antioxidants are compounds that protect against reactive oxygen species (ROS) “such as singlet oxygen, superoxide, peroxyl radicals, hydroxyl radicals and peroxynitrite” (LPI). In the article, a recent study indicated that flavonoids may have anti-oxidative properties equal to that of vitamin E (a recognized anti-oxidant) due to similarities in structure. This is important as it correlates with the Environmental Nutrition's’ article position that an intake of a diet rich in these flavonoids would be beneficial.

Reference Links
Phytonutrients
http://www.ars.usda.gov/Aboutus/docs.htm?docid=4142#what_are

Flavonoids
http://lpi.oregonstate.edu/f-w00/flavonoid.html

2 comments:

GabrielleB495 said...

Thanks for clarifying the meaning of 'phytonutrient flavenoids'. Antioxidant effects of fruits and vegetables that contain the infamous b-carotene is just one of the many examples why eating healthy is beneficial.

MariaO495 said...

http://www.ars.usda.gov/Aboutus/docs.htm?docid=4142
Here are commonly some of the proposed mechanisms by which phytonutrients may protect human health.
•serve as antioxidants
•enhance immune response
•enhance cell-to-cell communication
•alter estrogen metabolism
•convert to vitamin A (beta-carotene is metabolized to vitamin A)
•cause cancer cells to die (apoptosis)
•repair DNA damage caused by smoking and other toxic exposures
•detoxify carcinogens through the activation of the cytocrome P450 and Phase II enzyme systems

This article has more information about phytoneutrients.

According to the sources, more research is needed to firmly establish the mechanisms of action of the various phytochemicals.