The shallot is a type of onion, specifically a botanical variety of the species Allium cepa. The shallot was formerly classified as a separate species.
Nutrition. 100g of onions contain 9.34g of carbohydrates, 1.1g of protein and 0.1g of fat. They also contain 1.7g of dietary fiber and 23mg of calcium. 100g of shallots contain 16.8g of carbohydrates, 2.50g of protein, and 0.1g of fat.