A recent study, published by researchers at the Wisconsin School of Pharmacy, found that among CBD oils, only 36% had the correct ingredients and concentrations as stated on the label, 37% had more than what was stated on the label, and 9% had less than what was listed on the label. The remaining 18% didn’t have any specific CBD label claims.THC was detected in 55% of oils, with concentrations as high as 0.2%. And 57% of other products tested made nonspecific CBD claims, denoting CBD as “full spectrum hemp extract” or “activated cannabinoids”.