A study in Brazilian prisons found that prisoners who received an ayahuasca session had a statistically significant lower rate of recidivism compared to a control group.

“And so it became interesting to Brazilian researchers as to whether or not they could affect recidivism rates for prisoners in Brazilian prisons, right? So they gave half of the prisoners, you know, some sort of inert substance and half of the prisoners an ayahuasca session. And the recidivism rate or the return to prison rate in the ayahuasca exposed individuals was statistically significantly lower than the recidivism rate in the control group, suggesting that, you know, whatever is going on there seems to have an effect on whatever drives criminal behavior, whatever criminal behavior that happened to be.”