Hi All, I'm doing metal chelation and taking King Chlorella. My doctor recommends Biopure. I've also heard that Prime Chlorella is good. Anyone else taking these brands? Are there any other metal free, safely grown brands that anyone has found? What I've heard is that it's all about the conditions under the chlorella is grown--it must be grown indoors in a greenhouse like fashion free of any metals in the soil or air or the Chlorella with bind with it. That's why cheaper brands may be worse than not taking chlorella at all, because they're already contaminated with metal. Thoughts? THANK YOU!