Lithium

It is not yet known what particular function of lithium may make it an essential nutrient. It is thought to stabilize serotonin transmission in the nervous system; it influences sodium transport; and it may even increase lymphocytic (white blood cell) proliferation and depress the suppressor cell activity, thus strengthening the immune system. There is also speculation that lithium is in some way involved in cancer genesis or prevention.

Sources

Sugarcane, seaweed, natural mineral waters.