100 g of Feijoa contains a 53-day dose of iodine. Even such seafood does not contain such a quantity of this trace element important for the functioning of the thyroid gland. This iodine content, together with other substances, contributes to the normalization of metabolism; feijoa enhances immunity, as it contains a lot of vitamin C; it is recommended to use with vitamin deficiency, as it contains a wide variety of vitamins; many substances contained in this fruit have antioxidant properties. Feijoa has a preventive effect against cancer. It has anti-inflammatory properties, increases mental activity.