I'm on my 6th bottle of chlorella. I'm taking it for heavy metal cleansing. I've experienced more detox symptoms since I started taking it than any other one thing I've done. It's GOTTA be doing SOMETHING. I'm taking chlorella that has nothing added, only the gelatin caps. Like any product you ever buy READ THE LABEL ... COMPARE .. FIND WHAT YOU'RE COMFORTABLE WITH ... I don't think my body will ever need any magnesium sterate - they make glue out of that one!