The health benefits of onions include their role in substantially relieving a number of diseases including the common cold, asthma, bacterial infections, respiratory problems, angina, and cough. Onions are also known to repel bloodthirsty insects. In other words, you may say that onions are a true gift from nature, even if they make you cry.
Onions have many valuable medicinal applications because of the nutrients, vitamins, minerals, and organic compounds contained in them, including the presence of sulfuric compounds and quercetin in traces of the essential oils. They also contain mineral components such as calcium, magnesium, sodium, potassium, selenium, and phosphorus, and they are a good source of vitamin C, vitamin B6, and dietary fiber.