There has been one study from 2021 though, conducted by researchers at the University of Queensland together with Botanix Pharmaceuticals Limited. They found that cannabidiol (CBD), the non-psychoactive compound in marijuana, was effective in treating many different types of bacteria. “This is the first time CBD has been shown to kill some types of Gram-negative bacteria. These bacteria have an extra outer membrane, an additional line of defence that makes it harder for antibiotics to penetrate,” explains Dr. Blaskovich, Associate Professor at the University of Queensland.