Adding this study as a brief follow-up to anyone interested in Coleus Forskohlii looking for a source on contaminants; http://www.ncbi.nlm.nih.gov/pubmed/22729

Adding this study as a brief follow-up to anyone interested in Coleus Forskohlii looking for a source on contaminants; http://www.ncbi.nlm.nih.gov/pubmed/22729658 http://www.ncbi.nlm.nih.gov/pubmed/22729658 Long story short, the study (6 refs) found dose-related hepatoxicity in mice, and also concluded Forskohlii's main mechanism of action was not directly responsible for the decreased function. While not conclusive, it suggests to me that the industry surrounding it allows for a lot of "anonymous" stock to be packaged and sold (meaning, no heavy metal or contaminant controls). Being an African plant potentially harvested w/o controls, and with supplement vendors looking for optimal prices, the incentives aren't tipped in the favor of transparency; an example of this actually happening was with Eurycoma Longfolia (tongkat ali) harvested from Malaysia that contained varying and dangerous levels of heavy metals. The context was similar.