Wednesday, March 20, 2013

Article # 411. Role of Antioxidant and the Source of Food


Antioxidant is a molecule that slows and prevents Free Radical damange (oxidation) in your body.



Role of antioxidants in the body system was first discovered in unsaturated fats to prevents rancidity (rancidity is the process in which the chemical of oils and fats is decomposed). Only then the discovery of antioxidant in vitamins. For vitamin A, C & E the role of antioxidant in biochemistry was being realized.
 
Free radicals is the by-product of oxygen in our body. Oxygen is essential in our body. But we are exposed to free radicals that are harmful to our body. Free radicals often resulted from smoking, too much alcohol drinking, too much exposure from sunlight and exposure from heavy metals such as mercury.

The following are the roles and importance of antioxidant in our body:
  • Neutralises the effect of free radical
  • Slows down skin ageing
  • Slows down ageing
  • Slows down disease

Here is a table of different types of Antioxidant and the Source of Food


Different types of Antioxidants & Source of Food
Flavonoids
FlavonesParsley
Celery
Lemon and orange zest (peel)
IsoflavonesSoy beans
Soy beverages
Tofu
Miso
Flavanols (including catechins and proanthocyanidins)Catechins
Green and black tea
Dark chocolate
Black grapes
Red wine
Proanthocyanidins
Grapes
Peaches
Apples
Pears
Berries
Chocolate
FlavanonesCitrus fruits
Mint
FlavonolsApples
Onions
Blueberries
Leeks
Kale
Broccoli
Cherry tomatoes
AnthocyaninsPurple and dark red foods such as prunes, blueberries, blackberries, black grapes, cranberries, cherries, eggplant and radishes.
Red wine
Wholegrains
Isothiocyanates
SulphoraphaneBroccoli
Cabbage
Cauliflower
Horseradish
 
Phenolic acids
Caffeic acid, ferrulic acidBlueberries
Kiwi fruit
Plums
Cherries
Apples
Pears
Coffee
Wheatgerm
Bran
Sulphides
Various allyl sulphidesGarlic
Onions
Leeks
Vitamins
Vitamin CFruits
Vegetables
FolateGreen leafy vegetables
Avocado
Salmon
Fortified cereals and breads
Beta caroteneOrange and green fruits and vegetables
Vitamin EWheat germ
Sunflower and other seeds
Nuts
Vegetable oils
Minerals
SeleniumBrazil nuts
Wholegrains
Seafood

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