Welsh Onions have 1.3 times more energy per 100g than Young Green Onions. It has low energy density when compared to other foods. Young Green Onions, tops only having very low energy density.
Nutrients data from USDA National Nutrient Database for Standard Reference by US Department of Agriculture, Agricultural Research Service, Nutrient Data Laboratory.
Recommended Dietary Allowances (RDA) compiled from U.S. Department of Health & Human Services , National Institutes of Health.