I had a bronchial infection with a wicked cough for over 2 months which my MD couldn't relieve - tried prescription cough syrup and inhaler. After reading up on silver chelate, thought I'd give it a try. After 4-5 days felt significantly better. It's been 2 weeks and cough is gone. Pretty suprised but very relieved and annoyed coworkers happy my coughing finally subsided.