We have been growing onions for more than 5,000 years and the onions originally come from Asia. Yellow onions contain the antioxidant quercetin which is good for the immune system. It contains a lot of protein, fiber, chromium and vitamin C. Onions are prebiotics and are good for the intestinal flora.
The skin are rich and give a strong dye. You need to save the skins over a time as the one give a small amount of dyestuff.
