Donald Abrams was a member of the committee that reviewed the evidence that went into producing the report, and he said that the studies they reviewed overwhelmingly used pharmaceutically available preparations that contain THC, including dronabinol, nabilone and the whole-plant extract spray nabiximols, which contains equal parts CBD and THC. It’s impossible to know whether the benefits of cannabis can also be obtained from CBD alone, Abrams said, because CBD is just one of 400 chemicals present in the plant. So far, CBD in isolation has been studied in only a handful of randomized, placebo-controlled trials (considered the gold standard of evidence in medical research), and the evidence remains sparse.

Hemp oil can be found in many different delivery forms. Hemp oil can be consumed orally, applied topically or sublingually, or smoked via vaporization. Vaporization and sublingual application of hemp oil allows for a fast onset-of-action of the CBD, whereas pills and edible products can take 30 to 90 minutes on average to take effect. Topical hemp oil can be applied directly to areas of pain or inflammation, though it can also be absorbed into the systemic circulation.
Oils, oils, oils. When it comes to cooking oils, there are oh so many to choose from. Yes, we all know and love olive oil, but it's definitely not the only one you should be using. Different oils have different qualities that make them better for different uses. Some are best for baking, some are best for frying, and some are best in salad dressings. But which is best for which?
Right now, many companies are trying to fill their shelves with CBD-infused products. My guess is that the vast majority of these are not of good quality and may contain little to no CBD. In my opinion, if you are going to use CBD oil as a supplement for mental health, ask your practitioner for a high-quality version that you can take in a prescribed dosage. Don't try to get it through other products where the amount and quality are not well understood.
Since the 1960’s, medical research has collected research supporting the safety of CBD. Typical doses of 10mg to 100mg a day show no negative effects. Even one study where patients took 1,280 mg a day did not see a problem. The director of the National Institute of Drug Abuse has stated that CBD oil is safe, and recently the FDA approved CBD oil for use in children with epilepsy. 
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