What are Antioxidants ?
Compounds that protect against cell damage inflicted by molecules
called oxygen-free radicals, which are a major cause of disease
and aging.
Antioxidants
are natural substances in foods. They may help protect you
from disease by preventing the harmful effects of oxygen free
radicals on your body. Oxygen free radicals are formed as
cells in your body combine with oxygen to make energy. Free
radicals also come from smoking or being exposed to things
in the environment like radiation or sunlight. As we age,
this damage may build up. According to one theory of aging,
in time this build-up harms cells, tissues, and organs.
Your body’s own antioxidant defense system stops most
free-radical damage, but not all. Antioxidants may prevent
cataracts and heart disease, protect against damage from smoking,
or boost immunity to illness.
Some antioxidants, such as the enzyme SOD (superoxide
dismutase), are only useful when produced in the body. SOD
pills have no effect on the body. They are broken up into
different substances during digestion.
Other antioxidants that come from food include:
- beta-carotene,
present in deep-colored fruits and vegetables,
- selenium,
found in seafood, liver, meat, and grains
- vitamin
C, from citrus fruits, peppers, tomatoes, and berries and
- vitamin
E, present in wheat germ, nuts, sesame seeds, and canola,
olive, and peanut oils.
| nia.nih.gov
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| fda.gov
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