Populations from regions in which there is a low level of selenium in the soil have been shown to be more likely to have heart disease. Selenium is also thought to promote growth. Once thought to be unimportant, zinc is now known to be a part of various enzyme molecules, including some important in sexual development and growth of sperm. Also, zinc appears to be involved in wound healing and the sense of taste. A severe zinc deficiency can lead to short stature and skin disorders.
Physicians are cautious about zinc supplements.
An overdose can cause nausea , vomiting , and abdominal pains and interfere with the immune system.