Red onion isn’t a super source of many vitamins and minerals, but it does contain some, and it’s loaded with organosulfur that may offer some serious health benefits. Organosulfur compounds are powerful antioxidants, which means they help scrub your cells clean of cancer-causing free radicals. Some modest research has shown that organosulfur compunds might also have anti-cancer properties, though these promising early findings need more trials to back them up. Onions form the flavour base of so many cuisines that it’s easy to include red onion in a wide range of meals. Are red onions healthier than white or yellow onions? The answer is yes, they are. Colour in nature means health. The deeper and richer the colour of a fruit or vegetable, the more photochemicals, minerals and vitamins are present in it.