Free radical attack on our bodies is the primary cause of aging (Packer,1999). Free radicals are unstable oxygen molecules derived from pollutants, smoking, physical exercise, eating and even breathing. Free radicals (oxidants) attack healthy cells which can lead topremature aging, cancer, hardening of arteries, heart diseases, stroke, etc.
Free radical attack is simply the oxidation process. This is the same process that causes metals to rust (deteriorate), and freshly cut apples to turn brown. This is the same process that causes our bodies to age over time and become prone to many age-related diseases.

How do we stop the destructive forces of free radicals and significantly slow the aging process? The answer is: "through the power of ANTIOXIDANTS"

Antioxidants are needed by our bodies to neutralise and destroy free radicals (oxidants). In doing so, they significantly slow the aging process and provide a protective barrier for our bodies. Antioxidants help keep our skin, hair, organs, muscles, blood, and arteries youthful.

Goji berries (Lycium barbarum) contain the highest levels of antioxidants than any other food on earth! This fact was discovered by research scientists at Tufts University, Boston (USA) where the Oxygen Radical Absorption Capacity (ORAC) test was developed. The ORAC test analyses the level of antioxidants in food.

Eating foods high in antioxidants is the best way to protect against free radical attack (refer to US. Dept. of Agriculture article on aging).

I myself is a goji fun.  I always buy goji berries from Internet. I can certainly recommend a good online store: Goji King.  Try it out!