There is a somewhat recent scare from a published study suggesting CBD causes liver toxicity. ProjectCBD has a great overview of why this study is flawed, but we can turn the alarm off about this subject. When converting from animal dosages to humans, the study used dosages where the lowest dose was at the upper end of recommendations for humans. The highest dose (2460 mg/kg) when converted is roughly 10 times the maximum recommended dosage for humans. So they are using dosing that is unrealistic to a real world situation. Another point is that over the counter medications, like acetaminophen (Tylenol), can cause very severe liver failure at high dosages, yet are available to anyone at most stores, and not to mention alcohol and all the liver and other issues associated with that.  There is some concern with the liver and CBD though. CBD can inhibit the breakdown of other medication you are taking, effectively increasing the amount of the drug in your body, which could then cause liver toxicity. This is the same reason some medications will tell you to avoid grapefruit juice. So if you are taking medications, like blood thinners, you should talk to your doctor about using CBD along with your medication, so they can monitor your health.