Antioxidants are compounds that play a key role in protecting the body from the damaging effects of free radicals. Free radicals, formed as a result of metabolic processes and environmental influences, can lead to oxidative stress, cell damage and, consequently, the development of chronic diseases. Thanks to antioxidants, our body is able to neutralise these harmful molecules, resulting in better health and a longer life. In this article, we will discuss in detail what antioxidants are, their sources and their benefits for our health.