A negative side effect of goji juice is its poor interaction with the blood thinner Warfarin and other drugs for diabetes and blood pressure. Additional side effects include increased skin sensitivity to sunlight and kidney problems, due to the high oxalate content of the juice.
Goji juice is made from goji berries, which are believed to lower blood sugar levels. Also known as wolfberries, goji berries come from China, where they are traditionally eaten to promote longevity. They can be juiced or dried for preservation, and are eaten raw, cooked or dried. They are made into teas, juices, wines and medicines.
Goji berries are eaten to treat diabetes, high blood pressure, vision problems and fevers. They are filled with antioxidants and complex starches that may benefit the immune system and alleviate some of the side effects caused by living at high altitudes. When taken over long periods of time, purified and concentrated goji berries boost levels of antioxidant liver enzymes while reducing by-products in the blood by approximately 10 percent.
Goji berries are also high in vitamin A, which protects against skin damage and helps night vision. There is little scientific evidence to support claims that goji berries also help to improve mood and protect against Alzheimer's and other age-related diseases.