It is a 5 kg brine salt produced from 100% natural spring water salt, unrefined, in greenhouse type pans. Since it is unrefined, it does not contain chemicals such as anti-humidifiers and whiteners. It contains 84 different minerals that are beneficial to human health, such as lithium, vanadium, iron, magnesium and calcium. The rate of insoluble matter is 0. No iodine was added.