PRESENTATION NOTE

Please read the notes section for the explanations of images on slides is explained.

ANTIOXIDANTSElectrochemistry Layer A March 25, 2013Mrs. WilsonSadia Rahmani

WHAT IS AN ANTIOXIDANT?

Anti – Against Oxidant – Oxidation

ANTIOXIDANTS

Antioxidants are molecules in the body that work to prevent oxidation in the body.

.Oxidation: A process in which one or more electrons is lost by a chemical entity to an oxidizing agent in redox reactions.

FREE RADICALS

Chain Reaction…

Radical Healthy Cell

HOW ANTIOXIDANTS WORK

1. Stopping the Chain Reaction - The chain reaction that was initiated, [as explained in the previous slide], is stopped by Antioxidants because antioxidants provide the free radical with an electron so that it does not steal electrons from others (AntioxidantBuzz, 2010).

2. Prevention - Antioxidant comes as enzymes such as superoxide dismutase, and catalase actually prevent oxidation. They prevent the chain reaction from happening by getting rid of free radicals in the first place (AntioxidantBuzz, 2010).

COMMON ANTIOXIDANTS

Vitamin E

Vitamin C

Beta-carotene

Selenium

Antioxidant enzymes:

Superoxide dismutase CatalaseGlutathione peroxidase

FOODS WITH ANTIOXIDANTS

DAMAGING PROCESSES ANTIOXIDANTS PREVENT• Oxidative Stress: occurs when there are more

free radicals than antioxidants in the body.

PREVENTION

Various forms of Cancer Heart Disease Several types of diseasesArthritisImmune dysfunctionOther chronic conditions

“In one recent study, the addition of a polyphenol-rich blueberry gel to the diet of oral cancer patients prevented recurrence of the cancer. Another experiment demonstrated that increased levels of selenium in the diets of a group of HIV-positive patients significantly delayed progression of the disease” (Solmaz Barazesh, Penn State).

Research: Antioxidants

BENEFITS TO HUMANS

Gets rid of free radicalsBenefits different parts of the body in different waysCan decrease evidence of aging

RISKS TO HUMAN HEALTH

Over consumption of any antioxidants lead to side effects.Examples:

Vitamin E: Over consumption causes: nausea, headaches… gastrointestinal bleeding, blurred vision

Calcium: Stomach problems and kidney stones.

THANK YOU

Remember: Always have your Antioxidants but don’t have too much!

References

"Antioxidant Buzz." Antioxidant Buzz Retrieved, Web. 3 Apr. 2013. http://www.antioxidantbuzz.com/

Barazesh, Solmaz. "Probing Question: How do antioxidants work? | Penn State University." News | Penn State University. 18 Aug. 2008. Retrieved Web. 3 Apr. 2013. <http://news.psu.edu/story/141171/2008/08/18/research/probing-question-how-do-antioxidants-work>.

"How antioxidants work - DnaTube.com - Scientific Video and Animation Site."DnaTube.com - Scientific Video and Animation Site. Retrieved Web. 26 Mar. 2013. <http://www.dnatube.com/video/4877/How-antioxidants-work>.

James "The Side Effects of Antioxidants | Better Innovations Blog." Health, Wellness, & Fitness Information & Equipment Reviews | Official Blog of Vanko Trading Incorporated. Retrieved, Web. 3 Apr. 2013.

<http://blog.betterinnovations.com/2011/03/16/the-side-effects-of-antioxidants/#axzz2PMyVr5Tt>.

Mandal, Dr Ananya, and MD. " What are Antioxidants?." THE MEDICAL NEWS | from News-Medical.Net - Latest Medical News and Research from Around the World. Retrieved, Web. 3 Apr. 2013. <http://www.news-medical.net/health/What-are-Antioxidants.aspx>.

Parnes, Robin Brett. "Discovery Health "Types of Antioxidants"." Discovery Health "Health Guides". Retrieved Web. 3 Apr. 2013. <http://health.howstuffworks.com/wellness/food-nutrition/facts/antioxidant3.htm>.

"What Is Oxidative Stress? (with pictures)." wiseGEEK: clear answers for common questions. Retrieved Web. 26 Mar. 2013. <http://www.wisegeek.com/what-is-oxidative-stress.htm>.