Tell your doctor if you have or had any of the following medical conditions:
. dehydration
. eating disorders (anorexia, bulimia)
. a wasting syndrome including unexplained weight loss, fatigue, weakness and loss of appetite (cachexia)
. malnutrition (low reserves of glutathione)
. a metabolic condition called glucose-6-phosphate dehydrogenase deficiency (G6PD)
. hypovolaemia (decreased blood volume)