If you wash onion properly then you will see that chemical colours are getting extracted from it. That is not a sign of a good and healthy onion. Eating such onions will surely cause health issues for you.
If you want to have fresh and healthy onions then we, at BBC Super Fresh Fruits Pvt Ltd, can certainly help you. We will supply fresh onions cultivated in the organic fields of India. To import fresh onions in your country, contact us immediately.