Although CBD oils aren’t regulated by the FDA, purchasing products stateside from one of the nine states where recreational and medical cannabis use is legal will likely result in a higher-quality product than buying one made with hemp-derived CBD oil imported from abroad, says Martin Lee, director of Project CBD, a nonprofit that promotes medical research into CBD.
Warning: It IS possible to take too much CBD oil. While you cannot fatally overdose on CBD and there are very few negative side effects, too much has been shown to cause drowsiness, lethargy, upset stomach, nausea and diarrhea. The exact amounts that lead to these side effects are unknown, which is why you should start with small amounts and slowly increase the dose over time until you experience your desired result. (1)
There are a number of possible side effects to using CBD oil, such as fatigue, dry mouth, lightheadedness, hypotension, and impaired motor functions. However, when used in moderate amounts, most people do not experience these side effects, and none of them are known for being fatal or particularly dangerous. More than 20,000 studies have been done in the past 15 years on cannabis, hemp, and cannabinoids, and the results have been overwhelmingly supportive of the therapeutic potential and viability of CBD oil. That being said, some people should be cautious before using this powerful oil.
Naturally, the testimonies of these experts were based on a comprehensive literature review, an endeavor which we have also undertaken, albeit in a less official capacity. While many new products have been hailed as a panacea in their times, and many web sources certainly allude to this status for CBD, our objective was more modest – presenting ten possible benefits of cannabidiol where sufficient evidence exists to back up the claims.
If you live in a state where CBD is legal for your condition, it’s best to buy it from a state-regulated dispensary. But even there, oversight is uneven. “I feel safe being a cannabis consumer in Colorado, since the state tracks everything from seed to sale, but I didn’t the first few years after cannabis became legal,” when the rules were still taking shape, says Robyn Griggs Lawrence, the Boulder author of The Cannabis Kitchen Cookbook, which features recipes for cannabis edibles.
Lisa Hamilton, a jeweler and doula in Brooklyn, NY, knows about the side effects. She recently tried CBD for the shoulder pain that plagued her five years after an accident. Her doctor certified that she was in chronic pain, which under New York State law allowed her to buy from a state dispensary. One Friday, she swallowed two 10-mg capsules, the amount recommended at the dispensary, then took another two on Saturday. “By Sunday, it felt like I’d gotten hit by a truck. Every muscle and joint ached,” Hamilton says. She cut back to one pill a day the following week, but still felt hungover. She stopped after that.
As the CBD Pure Hemp Oil label warns, you should not take the supplement if you are breastfeeding or pregnant, as there isn’t enough information on how it could affect the baby. Also, some studies suggest a long-term heavy use of cannabis can have negative neuropsychologic and behavioral effects, and even cause acute pancreatitis, although the exact mechanisms are still unknown.
Your body is checking if you need water, food, or rest, if your hormone levels are right, and if everything in your cells and bloodstream are stable. Its goals is to keep everything at a normal range. For example, if it’s hot outside, it helps you cool down through sweating. If you need fuel, it makes your stomach growl to urge you to eat. It accomplishes these things with the help of two cannabinoid receptors, CB1 and CB2.
For example, both CBD and THC affect the body’s endocannabinoid system and thus provide relief for many of the same conditions. CBD is used for more “serious ailments.” Including but not limited to seizures, psychosis or mental disorders and inflammatory bowel disease. The reason for that is that CBD doesn’t get you “high.” In fact, it would be impossible for a person to get high while using CBD because as we said above, it interferes with the CB1 receptors. 
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