Antioxidants

Definition

Antioxidants are substances that inhibit oxidation, a chemical reaction that can produce free radicals leading to cell damage. They play a critical role in protecting cells from oxidative stress, which is linked to various diseases and aging. By neutralizing free radicals, antioxidants contribute to the health benefits of many plant-based foods, vitamins, and minerals, highlighting their importance in diet and nutrition.

5 Must Know Facts For Your Next Test

1. Antioxidants are categorized into two types: endogenous, which are produced by the body, and exogenous, which come from external sources like food.
2. Common dietary antioxidants include vitamins C and E, selenium, flavonoids, and carotenoids, all of which can be found in fruits and vegetables.
3. The consumption of antioxidant-rich foods is associated with a reduced risk of chronic diseases such as heart disease, cancer, and neurodegenerative disorders.
4. Some food preservation methods utilize antioxidants to prolong shelf life by preventing rancidity and deterioration caused by oxidative processes.
5. Antioxidants also play a role in functional foods and nutraceuticals, as they are often marketed for their health-promoting effects.

Review Questions

• How do antioxidants impact health and disease prevention?
  • Antioxidants help protect the body from oxidative stress by neutralizing free radicals that can cause cellular damage. This protective effect is linked to a reduced risk of chronic diseases such as heart disease and cancer. By including antioxidant-rich foods in the diet, individuals may enhance their overall health and lower the likelihood of developing various age-related illnesses.
• Discuss the role of antioxidants in functional foods and nutraceuticals.
  • In functional foods and nutraceuticals, antioxidants are often highlighted for their health benefits. These products may contain concentrated sources of antioxidants aimed at enhancing well-being or preventing disease. Manufacturers use antioxidants not only for their potential health-promoting properties but also for their ability to improve food stability and shelf life.
• Evaluate the historical significance of antioxidants in food science and technology advancements.
  • The historical significance of antioxidants in food science reflects evolving understanding of food preservation and health. Initially discovered for their role in preventing spoilage, research later highlighted their health benefits against diseases linked to oxidative stress. This duality has driven innovations in food technology aimed at enriching foods with antioxidants while extending their shelf life, demonstrating a crucial intersection between consumer health awareness and food preservation strategies.

Related terms

Free Radicals: Unstable molecules that can cause cellular damage by reacting with other molecules in the body, leading to oxidative stress.

Oxidative Stress: An imbalance between free radicals and antioxidants in the body, which can result in cellular damage and contribute to various diseases.

Phytochemicals: Naturally occurring compounds found in plants that can provide health benefits, many of which have antioxidant properties.