adverse effects ofonions could be contact dermatitis if onion juice irritates the skin. Some people experience stomach pain after ingesting cooked or raw onions.
Of course, it’s not uncommon for onions to make you cry while you are chopping them.
Eating too many onions a day could also cause you to have bad breath due to sulfides in the vegetable. In fact, the smell of onions can also be emitted through your pores.
The sulfur content in onions may also cause odorous gas. The International Foundation for Gastrointestinal Disorders