The 10 Best Prebiotic Foods for Any Diet

The onion is another staple prebiotic that fits into a variety of diets and meal plans. Onions are a close relative of garlic, so it’s not surprising they are also rich in prebiotics like inulin and FOS.

Studies have found evidence of onions improving the cardiovascular system. Other bonuses come from compounds like quercetin, which has antioxidant and anticancer effects.