The present invention relates to a use of bacterium Bacillus coagulans TCI711 (BCRC910807) for preparing a pharmaceutical composition for reducing levels of heavy metals and protecting the liver. The bacterium Bacillus coagulans TCI711can reduce the levels of heavy metals, decrease the damage of liver cells raised by reactive oxygen species, increase the activity of mitochondria in liver cells, and reduce fatty liver formation so that it can therefore be used to treat liver disease.本發明係關於一芽孢乳酸菌的用途，提供了用於製備代謝重金屬及/或保護肝臟醫藥組成物之用途，其中該芽孢乳酸菌係Bacillus coagulans TCI711，寄存編號BCRC910807。藉由本發明醫藥組成物中的芽孢乳酸菌，可降低重金屬的濃度，降低氧化物質對肝臟細胞傷害，提升肝臟細胞粒線體的活性，並可降低脂肪肝的形成。
