Additionally, Dr. Franjo Grotenhermen of the Nova-Institute in Cologne, Germany said: "A concentration of 130 ng/ml THC-COOH in blood is a moderate concentration, which may be observed some hours after the use of one or two joints. Heavy regular use of cannabis easily results in THC-COOH concentrations of above 500 ng/ml. Many people use much more cannabis than Mr. Maisey did, without any negative consequences."
so then... what.... the.... fuck.... that just doesn't make sense. millions of people have 2-3x the concentration in their blood, that the guy did, daily. so again, i ask... what the fuck?