The 10 Best Prebiotic Foods for Any Diet

Leeks are also close relatives to onions and garlic and offer very similar effects thanks to their inulin content. They’re also nutrient-dense, meaning they have a lower calorie count but are rich in minerals and vitamins.

Most notably, leeks account for nearly 40 percent of the daily recommended value of vitamin K. This vitamin promotes blood clotting, bone metabolism, and a range of other complex functions. Because leeks have a milder flavor than onions while providing many of the same health benefits, they are a great substitute for people who dislike the stronger vegetable.