First thing you need to know is that onions are very healthy mainly due to their antibacterial, antifungal and anti-inflammatory properties. You can eat the onions fresh is which case the onion will act as an antioxidant, or you can eat it cooked.
There are many types of onions, and of course there is the garlic which is healthy but you must not consume it in large quantities. This especially applies for people who have problems with their digestive system, because the garlic I very difficult to digest.
However, you should also know that the garlic is even used for cosmetic purposes, as a shampoo that encourages the hair growth. It has been proved that the garlic is very effective in this field.
Other types of onions are used in the everyday meal, as salads, and as soups supplement. You can even make bread with onion, which is very tasty.
If you suffer from cramps, cook the onion in water for 20-30 minutes, then drink one glass of this mixture before bedtime. You will notice an immediate relief.
In this video you will get ideas on how to use onions:
Video by: https://www.youtube.com/channel/UCAVgKTAg-h8jlMTPKgKsXSQ