Natural anti-oxidants from agricultural by-products used in organic fish flesh.

The main constraint in the production of organic foods is the use of antioxidants in order to preserve their biological value. Synthetic antioxidants, such as BHT, BHA and ethoxyquin, cannot be used in feed for the production of organic food, as provided by EC Reg 710/2009 and subsequent implementing regulations. In this light it becomes necessary to replace the synthetic compounds with analogs of natural origin. Secondary metabolites from plants and agricultural by-products (ABP) of the agro-food industry represent a good source of natural antioxidants with high added value.