SRP412838 PRJNA910806 Gut microbiota differences between individuals with methamphetamine casual use and methamphetamine use disorder The purpose of this study was to compare differences in Gut microbiota (GM) between methamphetamine casual users (MCU) and those with methamphetamine use disorder (MUD). In this study, 16s rRNA sequencing (region V4) was performed on stool samples from 42 eligible study subjects (MCU: 21 vs MUD: 21) . Sequencing for this project was done on the Illumina MiSeq platform.