Goji berry is a fruittwo related plants, Lycium barbarum and L. chinsense. Is one of the most nutritious foods on the planet and is rightly considered by many to be superfood. It is an excellent source of B-complex vitamins thiamine, riboflavin and niacin. It contains 500 times more vitamin C per unit weight than oranges, while it has great antioxidant properties.. Many people believe that in addition to improving the immune system, it also gives longevity!