Vegetables are important for health and are a must have in order to stay fit and disease free. Eating vegetables provides health benefits — people who eat more vegetables and fruits as part of an overall healthy diet are likely to have a reduced risk of some chronic diseases. Vegetables provide nutrients vital for health and maintenance of the body. Onion is one such vegetable that contains various vitamins, minerals and potent plant compounds that have been shown to promote health in many ways. In fact, the medicinal properties of onions have been recognized since ancient times, when they were used to treat ailments like headaches, heart disease and mouth sores. Here is a look at why you should be eating raw onions daily.