Antioxidants, Food Processing and Health.

Area of Science:

• Food Science
• Nutritional Biochemistry
• Oxidative Stress

Background:

• Natural antioxidants are crucial for health but are often modified or lost during food processing (heat, UV, drying, irradiation).
• Antioxidants primarily undergo oxidation, converting from reduced to oxidized forms, a process well-documented.
• The health implications of these oxidized forms, produced during food processing and storage, remain under-explored.

Purpose of the Study:

• To highlight the neglected role of oxidized forms of natural antioxidants generated during food processing.
• To investigate the potential health effects of these oxidized antioxidant metabolites.
• To emphasize the importance of studying both reduced and oxidized forms of antioxidants and their metabolites.

Main Methods:

• Review of existing literature on antioxidant modification during food processing.
• Analysis of chemical transformations (oxidation, pyrolysis, hydrolysis) of antioxidants.
• Discussion of potential biological effects of oxidized antioxidants on cellular pathways.

Main Results:

• Food processing significantly modifies natural antioxidants, mainly through oxidation, into their oxidized forms.
• Oxidized antioxidants can influence cell signaling, transcription factor activity, and gene expression.
• Low doses of oxidized antioxidants may induce hormesis, activating repair and defense mechanisms for health benefits.

Conclusions:

• The oxidized forms of natural antioxidants produced during food processing warrant further investigation for their health impacts.
• Both reduced and oxidized antioxidants, along with their metabolites, may exert synergistic or additional health effects.
• Functional studies on organisms are essential to fully understand the biological significance of processed antioxidants.