We have to understand what causes anxiety (which isn't easy). But, many times it's an imbalance of hormones, serotonin is the biggest suspect. CBD by itself has been shown in many studies to raise levels of serotonin. Full spectrum could have compounds like myrcene that give the sleepy/sedative feeling and would allow a feeling of calmness as well. If you don't need to pass a drug test, take full spectrum.