Onions should make up a regular part of your diet, but every type has something a little different to offer. Like other onions, vidalia onions are rich in sulfur, a compound that has been studied for its ability to lower inflammation and increase the risk of inflammation-related ailments, such as asthma and arthritis.
Paleo and Antioxidants
All vegetables are an excellent source of antioxidants, but vidalia onions contain a particularly impressive dose of a type of antioxidant (flavonoids) that have been studied for their anti-cancer effects.
For those eating seasonally, Mark Sisson listed vidalia onions among his top ten spring vegetables.