Science Snippet: Antioxidants Explained

Many types of fruits, vegetables, and legumes are rich in antioxidants. Credit: iStock. While at the grocery store, you’ve likely noticed foods with labels saying they contain antioxidants, but what does that mean? In short, antioxidants are substances that may prevent or delay some types of cell damage. Many foods, including fruits and vegetables, naturally produce antioxidants like vitamins C and E, beta-carotene, and selenium. Our bodies also naturally produce antioxidant molecules such as alpha-lipoic acid, glutathione, and coenzyme Q10. Antioxidants are united by their ability to donate electrons, which helps them protect the body against reactive oxygen species (ROS). ROS form naturally during exercise, when your body converts food into energy, or during exposure to certain environmental factors such as cigarette smoke, air pollution, and sunlight. These molecules can “steal” electrons from other molecules, and though they aren’t always harmful, consistently high amounts of ROS in your body can cause a condition known as oxidative stress that can damage cells. That cell damage may also lead to chronic diseases, especially if ROS steal electrons from DNA or other important molecules and alter their functions. All antioxidants help prevent ROS from building up by giving them the electrons they seek, but each antioxidant has its own additional chemical behaviors and biological properties. This means that certain types of antioxidants perform s...
Source: Biomedical Beat Blog - National Institute of General Medical Sciences - Category: Research Authors: Tags: Chemistry, Biochemistry and Pharmacology Science Snippet Source Type: blogs