Just read that link. Thanks Niko.
I happen to use it. Have used regular from the grocery store garlic, Kent's Garlic Xtreme and Seachem's Garlic Guard. I have no clue if it's related or not but it 'seems' to have helped and until these future studies come out, I will continue to use it. I've never experienced nor read anything that points to negative effects so I figure, "why not?"