Nutralie's Immunity Booster Complex has been designed for the immune system and the body's energy metabolism. Its formula combines natural ingredients such as bee propolis and reishi mushrooms with 6 vitamins and 4 minerals, including zinc, iron, selenium and copper: Vitamin C contributes to maintaining the immune system in normal conditions and reducing the tiredness and fatigue. Group B vitamins help normal energy metabolism. Instructions for use: Take 1 capsule a day with a glass of water.