Leeks, a close relative of onions and garlic, are a flavorful and nutritious vegetable that offer several health benefits. Here are some key benefits associated with consuming leeks: Leeks are a good source of several important nutrients, including vitamins A, C, and K, as well as folate and manganese. They also contain smaller amounts of other vitamins and minerals like potassium, iron, and calcium. Like onions and garlic, leeks contain antioxidants that help protect the body against oxidative stress and damage caused by free radicals. The presence of compounds such as flavonoids and sulfur compounds contribute to the antioxidant activity of leeks.