Goji berries contain essential micro- and macronutrients such as calcium, potassium, iron, zinc and iodine and B vitamins, vitamins C, E, H, PP and A. Goji berries are especially rich in vitamin C. They also contain 4 types of polysaccharides that help convert calories into energy, improve skin condition and reduce blood pressure. Goji berries help to cope with stress, reduce anxiety, increase physical endurance. This is a wonderful means of preventing respiratory diseases.