Ki Immune Defence & Energy Formula brings together a combination of natural active ingredients that help build your body’s immunity when taken daily. Astragalus membranaceus root (Astragalus) Helps to strengthen the immune system and support energy production. Lentinula edodes mushroom (Shiitake mushroom) Rich in nutrients to help boost white blood cells. Olea europaea leaf (Olive leaf) A potent antioxidant that helps to support general health and wellbeing and a healthy cardiovascular system.