I took Colloidal Silver for about a week and felt the same way after 4 or 5 days. From what I have read about Colloidal Silver /gold, it can take up to 4-5 days for the levels of silver/gold to build up in your system and then have an effect. I felt a noticeable fatigue and cruddy feeling overall which I figured was die off. I did also have very loose to watery bowel movements that were very foul smelling and filled with candida and also to my surprise dead liver flukes. I also have blastocystis hominis so I am hoping the silver took care of that too. I have backed off of the silver for a week and may start up again this coing weekend.