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This paper therefore surveys the effectiveness of replacing the synthetic antioxidants with natural antioxidants from natural foods, spices and flavonoids.

Both the synthetic and natural antioxidants may have profound effects on the morphology and performance properties of the polymer packaging material which may ultimately impart negatively on the contained lipid, meat or beverage. They are not subject to stringent legislation due to their green / renewable nature. Natural antioxidants may be extracted from certain plants or consumed as part of the plant's fruit, seed, bark, stem, leaf or flower. On the contrary, natural antioxidants are a complex mixture of natural compounds and polyphenols inherent in some plants, herbs and spices in the form of tocopherols, ascorbic acids, carotenoids, flavonoids, amino acids, phospholipids, and sterols, in various proportions. They are refined, pure, cheap and readily available but are highly regulated in terms of dosage permitted by legislation in foods for healthy living. The synthetic antioxidants such as butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA), ethoxyquin, tert-butylhydroquinone (TBHQ) and propylgallate (PG), are based on chemicals. Antioxidants that may be incorporated into polymer systems to produce active polymer packaging include oxygen scavengers, ethylene scavengers, moisture absorbers, flavour and odor absorbers/releasers which may be sourced synthetically or naturally. Their ability to prevent the oxidation of the packaged foodstuff through the use of antioxidants helps to maintain food freshness, taste and quality over a prolonged period of time. Active polymer packages now constitute either all or part of most primary packages for foods and beverages. Antioxidants are incorporated into polymers to produce active polymer packaging films / wrappers and containers for the purpose of protecting and preserving packaged foods.

Polymers have become packaging material of choice due to their high strength to weight ratio, ease of processing, anti-corrosion and cost saving properties.

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