[gruez]

The google link you provided returns a snopes article about garlic roots, a blog post from McGill saying theres no problems with using human feces as fertilizer, and a bunch of natural/health food sites claiming Chinese garlic is filled with toxic chemicals. Is there any reputable source that says Chinese garlic is bad?

[vetinari]

Why do you need a reputable source for that? Why not just taste it? That enough of reason to avoid chinese garlic.