Citrus flavonoids and their antioxidant evaluation.

Area of Science:

• Biochemistry
• Nutritional Science
• Pharmacology

Background:

• Citrus flavonoids are vital antioxidants with significant health benefits.
• They play a crucial role in managing oxidative stress and are a key component of dietary antioxidant supplements.
• Their contribution to health is primarily mediated through antioxidant mechanisms.

Purpose of the Study:

• To review the biosynthesis, composition, and distribution of citrus flavonoids.
• To categorize and compare various methods for evaluating the antioxidant capacity of citrus flavonoids.
• To discuss the antioxidant functions, particularly the regulation of the Nrf2-antioxidases pathway, and identify research gaps.

Main Methods:

• Literature review on citrus flavonoid biosynthesis, composition, and distribution.
• Categorization of antioxidant capacity evaluation systems into chemical, cellular, animal, and clinical.
• Comparative analysis of modeling methods, applicable scenarios, and merits of different evaluation systems.

Main Results:

• Citrus flavonoids are synthesized through specific pathways, with varied composition and distribution across citrus species.
• Four main systems for evaluating antioxidant capacity were identified and compared.
• The Nrf2-antioxidases pathway is a key mechanism through which citrus flavonoids exert their antioxidant effects.

Conclusions:

• Citrus flavonoids are important for health due to their antioxidant properties.
• A comprehensive understanding of their evaluation systems is crucial for accurate assessment.
• Further research is needed to fully elucidate their mechanisms and optimize their application.