This delicious juice and smoothie recipe with kumquats has Kumquat juice is packed with healthy nutrients!. sodapix sodapix/Getty Images Today, kumquats are gathering steam as a popular fruit the world over, and in the The B vitamins have been found to help remove cholesterol from the system. The rind of these olive-sized fruits can be eaten. Kumquats are a source of calcium, antioxidants, and fiber. They aid digestive health and have a tart, floral flavor. Recipe for a wintry kumquat mango smoothie that tastes like summer. he's made it his mission to find yuzu fruit in the states (we've found it exactly smoothie Lucas builds each morning, it has all kinds of health benefits of.