The genetic alterations observed in head and neck cancer are mainly due to oncogene activation (gain of function mutations) and tumor suppressor gene inactivation (loss of function mutations). leading to deregulation of cell proliferation and death. These genetic alterations include gene amplification and overexpression of oncogenes such as myc. erbB-2. https://parisnaturalfoodes.shop/product-category/seleno-excell-selenium-200mcg/