Walnut has long been a favorite delicacy and ingredient in many national cuisines. The benefits and harms to the body of a walnut were studied back in the days of Hippocrates, many still argue about its value, so it will be useful to learn a little more about this type of nut. Due to the presence of a fairly high amount of iodine in the nut, the product is recommended to be regularly consumed in case of problems with the thyroid gland. Walnut will be extremely useful for those people who live in unfavorable environmental conditions, especially if there is an increase in the radiation background or its approach to the critical level.