RSO, or Rick Simpson oil, is a cannabis concentrate that looks like oily tar. Its thick consistency mixed with its dark hue—typically a dark brown or even black color—make it look like a potent substance. (Spoiler: it is.)
RSO is created through a unique extraction process that preserves much of the plant material, including the trichomes that contain cannabinoids, in the final product. RSO can be smoked, applied topically, or taken orally, depending on your preference. It’s important to note though that because it is packed with THC and other cannabinoids, it’s best to start with a small dose—no bigger than half a grain of rice.