Yes onions are a really healthy food to eat.
The phytochemicals in onions along with the vitamin C onions contain will help improve immunity. Onions also contain chromium, which helps assist in regulating your blood sugar.
For many years onions have been used to reduce inflammation and heal infections.
They also help improve blood circulation and and prevent blood clots and other heart conditions. Your doing good eating onions alone. I can't stand them alone I have to have them in soup or other food.