You’ve probably already heard about cannabidiol, better known as CBD. It’s become widely popular, touted for treating various conditions from insomnia to diabetes. Some people find it helpful for migraine headaches. CBD, a component of marijuana, is usually derived from hemp and typically doesn’t contain THC, meaning it won’t induce a high. The CBD industry saw significant growth after the legalization of hemp cultivation in a farm bill signed by President Trump. There is one FDA-approved prescription drug containing CBD for treating rare childhood epilepsy forms. However, much of what we know about CBD is based on personal experiences and unproven animal studies. Experts note that effective doses and methods of using CBD are still unclear. For instance, a few drops of CBD under the tongue might deliver 10 milligrams, but some researchers suggest much higher doses are needed for stress relief. As CBD products are marketed as supplements, they’re not rigorously evaluated by the FDA for safety or effectiveness, leading to uncertainty about the actual CBD content in these products. Despite these uncertainties, the CBD market is expanding rapidly, but much remains to be discovered about its effects and efficacy.