Antioxidant theory is still evolving as researchers uncover new mechanisms and evaluate activity within the body.

In the study, the researchers found that black tea recorded the highest phenolic content, in-vitro phenolic availability and antioxidant activity.

Most raw fruits are rich in antioxidants. Frozen vegetables also have a high antioxidant level.

Citrus, strawberries, bell peppers, carrots, sweet potatoes, and dark leafy greens are some examples of produce rich in antioxidant vitamin C, vitamin E, or beta-carotene--but mix it up.

Research suggests that the vitamins C and beta-carotene--provided by a variety of fruits and vegetables--play an important role in the endogenous antioxidant system, as does vitamin E, which is found in whole grains and high-quality, properly extracted and protected vegetable oils.

Summary: The study was designed to assess and compare the antioxidant properties of plants namely, Glycyrrhiza glabra, Illicuim verum, Myristica fragrans, Curculigo orchioeides, and Embelia ribes.

Polyphenols have antioxidant, anti-inflammatory, anticarcinogenic and other properties.

The antioxidant capacity of the human body is closely linked to health, where the total antioxidant capacity of human serum is made up of enzymatic and nonenzymatic components.

antioxidant enzymes and iron-binding proteins) or by nonspecific mechanisms.

"It's possible that individual antioxidants, or the main foods that contribute those antioxidants-rather than the total antioxidant level in the diet-contribute to the lower risk of dementia and stroke found in earlier studies," she noted.