The Eat to Live diet I am doing stresses the importance of berries for good nutritional content, and blueberries are one of the highest, but when I googled goji berries I found http://news.bbc.co.uk/1/hi/magazine/5315202.stm
which more or less says they are OK, but perhaps nothing miraculous. I would be interested to see if there are any differing views. Good luck