Antioxidants: Chemistry, Natural Sources and Health Benefits

Abstract

Antioxidants are a class of compounds that play a crucial role in maintaining human health and preventing diseases. They are found in a wide range of natural sources, including fruits, vegetables, nuts, and seeds. Antioxidants are also synthesized in the human body, where they help to protect cells from damage caused by free radicals. Chemically, antioxidants are a diverse group of compounds that share the ability to neutralize or mop up free radicals. Free radicals are highly reactive molecules that are formed in the body as a result of normal metabolic processes, exposure to environmental stressors, and other factors. If left unchecked, free radicals can cause oxidative stress, which can lead to cell damage, inflammation, and a range of chronic diseases. Antioxidants work by donating electrons to free radicals, thereby neutralizing their reactivity and preventing them from causing harm to cells and tissues. Different antioxidants have different mechanisms of action, and some may be more effective than others in preventing specific types of cell damage. The health effects of antioxidants are numerous and well-documented. A diet rich in antioxidants has been shown to reduce the risk of chronic diseases such as heart disease, cancer, and cognitive decline. Antioxidants may also help to improve immune function, reduce inflammation, and promote healthy aging. Some of the most well-known antioxidants include vitamins C and E, beta-carotene, and other carotenoids, as well as polyphenols such as flavonoids and phenolic acids. Other antioxidants, such as selenium and zinc, are important minerals that play a crucial role in maintaining antioxidant defenses in the body.