What is anti-oxidant and
free radicals
Anti-oxidants fight free radicals. So what are free radicals?
Free radicals play an important role, in both health and disease, and have
been implicated in countless human disease processes. Free radicals
are vital to human health. These molecules (Reactive Oxidant Species)
are extremely important to human metabolic processes.
Any molecule can become a free radical by either losing
or gaining an electron and molecules containing these uncoupled electrons
are very reactive. Once free radicals are initiated, they can propagate
by becoming involved in chain reactions with other less reactive
types. The resulting chain reaction compounds generally survive longer
in the body and therefore increase the potential for cellular damage.
A free radical has three stages: the initiation stage,
propagation and finally, termination. They are terminated or neutralized,
by nutrient antioxidants, enzymatic mechanisms, or by recombining
with each other. The aim is to attain a delicate balance between
free radical activity and optimum antioxidant activity, thereby
achieving a state of balance (homeostasis).
The three known free radicals are hydroxyl, superoxide
and peroxide. If they are not neutralized into "good oxygen", free radicals
can speed up the aging process and play a major part in the development
of degenerative and/or chronic diseases.
(Free-radical damage. Created by normal body functions,
free radicals are unstable molecules that can damage cells and cell DNA.
Doctors know from autopsy evidence that brain cells are particularly vulnerable.
Researchers have tested the effect of a variety of so-called antioxidants--which
neutralize free radicals--with mixed results. A substance called curcumin
(from the herb turmeric) significantly improves brain function in animals
with memory deficits, Cole said; so do preparations that include alpha-lipoic
acid and vitamins C and E, to name a few.)(080060) |