The nettle.
Nettle leaves contain, among other things, minerals and vitamins such as potassium, calcium, iron, vitamin C and vitamin E as well as flavonoids and silicic, formic and acetic acid.
Zinc and selenium.
Zinc and selenium are vital, essential trace elements and are involved in many metabolic processes in the human body. Both contribute to the normal function of the immune system.
Zinc contributes to normal fertility and reproduction and is important for maintaining normal testosterone levels in the blood. Selenium contributes to normal thyroid function and supports normal sperm production in men.