Conclusion
Experts agree that onions are a healthy food, but their effect on sleep varies from person to person. For some people, they can cause heartburn and restlessness. For others, especially when cooked well, they may have no negative effects or may even help you relax slightly.
The most important thing is to listen to your own body’s signals. If onions are keeping you awake, it’s better to move them to lunch. If you tolerate them well, there’s no need to give them up completely.
As with many other foods, not only the nutritional value, but also the time and method of consumption are key.
