Selenium uses :
It is found naturally in foods or as a supplement. Selenium is an essential component of various enzymes and proteins, called selenoproteins, that help to make DNA and protect against cell damage and infections; these proteins are also involved in reproduction and the metabolism of thyroid hormones.
Tribulus :
It is used in traditional medicine for chest pain, heart problems, dizziness, skin and eye disorders, to expel kidney stones, and as a diuretic and tonic. Tribulus is also marketed as a dietary supplement to improve sexual function and for body building due to the belief that it acts like testosterone in the body.