Two types of bases or “carriers” are generally used when making cannabis tinctures: ethanol or oils (MCT, Grapeseed, etc.). These liquids serve as a vessel that THC, CBD, and other phytocannabinoids and terpenes can bind to. Most often, tinctures are extracted in alcohol because it acts as a more potent solvent compared to other carriers. Some herbs have a harder time releasing their medicinal qualities to solvents that are less potent, such as water, apple cider vinegar or vegetable glycerine. It's important to keep in mind that tinctures with an ethanol base will be absorbed into the bloodstream more quickly.