The delicate flavor of lychee fruit blends perfectly with the sweetness of pineapple juice, which adds flavor to the soft tofu. If you cannot find fresh lychee, the canned variety works in smoothie recipes too. Make sure to remove the skin and the stone from the lychees before blending. Lychees are a good source of copper, and pineapple is a good source of manganese. Copper and manganese are both components of the superoxide dismutase enzyme. The SOD enzyme fights free radicals in the body, keeping you young and healthy. So enjoy this delicate smoothie recipe and know that you have discovered the fountain of youth.