D-limonene (IMAGE) Johns Hopkins Medicine Caption A Johns Hopkins Medicine-led team has shown that d-limonene (left side of graphic), an essential oil derived from citrus — and found in cannabis — significantly reduces feelings of anxiety and panic, without altering the desired effect of THC (right side of graphic), the primary psychoactive ingredient of cannabis. Credit M.E. Newman, Johns Hopkins Medicine, using public domain image Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.