Goji Berries are a very rich source of vitamin C, having 500 times more vitamin C per ounce than oranges, actually more almost than any fruit you could name. They are also a superb source of vitamin A, not surprising because they are a really pretty red color. Goji berries also have vitamins B1, B2, B6, and E; they are becoming a famous antioxidant.
They are also a rich source of both selenium and germanium and have hence been used in a number of clinical trials involving cancer patients. When given to patients undergoing chemotherapy, the berries conferred significant protection for the liver. In Oriental medicine, they are said to correct chi deficiency, meaning that people with low energy, insomnia, heart palpitations, and even anxiety are more comfortable after consuming goji berries. The berries have 18 amino acids (higher than bee pollen) and 21 trace minerals, linoleic acid, and more beta carotene than carrots.
In vitro studies suggest that goji berries kill many kinds of cancer cells. The mechanism whereby this happens is believed to involve some factor that inhibits the ability of the cell to divide, thus lowering its reproductive capacity. A large study in Japan suggested that tumor growth was inhibited by 58% among the patients eating goji berries as compared to the control groups. A study in Mongolia showed that patients eating the goji berries had a significant increase in lymphocyte activity and that their blood began to resemble that of much younger persons.