Delta 8 Canna Lean is exactly what it sounds like. Rather than the active ingredient being codeine that is mixed into the syrupy substance, we combine the syrup with activated THC concentrate. Weed lean syrup is then usually flavored in a variety of ways to mimic the types of flavors you would encounter when using regular cough. Basically, THC lean is just marijuana concentrates mixed with a syrupy substance. It has been created to replace the active ingredient that makes cough syrup dangerous to use recreationally.