The effects of CBD on receptors in the immune system may help reduce overall inflammation in the body. In turn, CBD oil may offer benefits for acne management. A human study published in the Journal of Clinical Investigationfound that the oil prevented activity in sebaceous glands. These glands are responsible for producing sebum, a natural oily substance that hydrates the skin. Too much sebum, however, can lead to acne.
And that’s what’s maddening and fascinating about CBD: It isn’t bullshit. Crystals are bullshit. Himalayan salt ionizers are bullshit. SugarBearHair apparently doesn’t contain what it says it does, though it wouldn’t work better than a well-balanced diet even if it did. CBD, though wildly understudied, is not bullshit. In fact, the FDA just approved its very first cannabis-derived drug, a CBD-based epilepsy treatment called Epidiolex. The dosage for Epidiolex starts at around 2.5 mg/kg and is increased to 5 mg/kg, so a 150-pound adult would settle onto a dose of just over 340 mg per day, though the diseases it targets start in childhood.
A 2007 study with the pharmaceutical 1:1 CBD:THC spray showed good results in helping patients with chronic pain sleep better. REM sleep behavior disorder (RBD) is characterized by the loss of complete muscle relaxation during REM sleep, associated with nightmares and physical activity during dreaming. Four patients in a case series treated with CBD in 2014 had prompt and substantial reduction in the frequency of RBD-related events without side effects. 
That lines up with one of the rare instances of FDA testing. In 2016, the FDA tested several “CBD oils,” ultimately issuing warnings to eight companies. Some of those oils were found to contain no or barely any CBD, and many contained illegal quantities of THC. For example, Healthy Hemp Oil’s “Herbal Renewals 25% CBD Hemp Oil Gold Label” contained 8.4 mg/g of THC. Sana Te Premium Oils, which sold 25 mg “CBD oil” capsules on Etsy, contained between 13 and 19 mg/g of THC and less than 0.1 mg/g of CBD.
But, uh, what is it that CBD is supposed to do? I visited a cannabis dispensary in Boulder to find out what the hype was all about. After passing an ID check, I was introduced to a “budtender” who pointed me to an impressive array of CBD products — tinctures, skin patches, drink powders, candies, salves, massage oil, lotions, “sexy time personal intimacy oil” and even vaginal suppositories to treat menstrual cramps.
Definitely not. Standard hemp oil, which can be found very cheaply at a grocery store, is a much different product than our full spectrum hemp extracts (not from seed). Standard hemp oil is produced by cold pressing the seeds, whereas our hemp extract is a full plant extraction with many components not typically found in the seeds. Hemp seed oil is considered to be a great nutritive food, but it doesn’t have the naturally occurring terpenes, cannabinoids and other components that our extracts do have.
Ingesting — think CBD lattes, edibles, or just a drop of oil on the tongue — is likely much less effective than inhaling, says Blessing. When CBD-containing oil is ingested, it wants to join the other fat in your body; most of the CBD taken this way will just stay in that fat, inert and never getting to the brain. When inhaled, CBD bypasses the digestive system, which wants to store fat.
Some studies have investigated the role of CBD in preventing cancer cell growth, but research is still in its early stages. The National Cancer Institute (NCI) says that CBD may help alleviate cancer symptoms and cancer treatment side effects. However, the NCI doesn’t fully endorse any form of cannabis as a cancer treatment. The action of CBD that’s promising for cancer treatment is its ability to moderate inflammation and change how cell reproduce. CBD has the effect of reducing the ability of some types of tumor cells to reproduce.
The mosaic of laws that govern CBD legality across the globe varies just as much as the legislation across the US. Generally, CBD extract is legal in most countries, but what makes it illegal is where and what it’s extracted from. Most Group of 20 (G20) countries allow CBD extracted from industrial hemp, but not CBD extracted from whole-plant marijuana. Note, however, the differences between the two. Legislation regarding international travel with CBD also varies among countries. For the foreseeable future, the best practice would be to search online, or contact the respective embassies or consulates, before traveling to determine whether your CBD is safe and legal.
CBD products with a ratio of 20:1 or higher are recommended and administered as drops, capsules, or edibles. Specifically, products made with Valentine X or Electra 4 are more energizing, helping relieve depression. When low energy is an issue, sativa or other stimulating strains can be helpful for improving energy and focus when THC can be tolerated. Varieties that are high in the terpene limonene are recommended for mood elevation.
It should also be noted that, because CBD oil is mostly unregulated, products may be incorrectly labeled. To that end, a study published in the Journal of the American Medical Association in 2017 found that nearly 70 percent of all CBD products sold online are mislabeled and that a number of products contain a significant amount of THC. Since THC can aggravate anxiety and make your heart beat faster than normal, it’s possible that using CBD oil that contains THC might make your anxiety worse.
^ Hayakawa K, Mishima K, Nozako M, Ogata A, Hazekawa M, Liu AX, Fujioka M, Abe K, Hasebe N, Egashira N, Iwasaki K, Fujiwara M (March 2007). "Repeated treatment with cannabidiol but not Delta9-tetrahydrocannabinol has a neuroprotective effect without the development of tolerance". Neuropharmacology. 52 (4): 1079–87. doi:10.1016/j.neuropharm.2006.11.005. PMID 17320118.
^ Hayakawa K, Mishima K, Hazekawa M, Sano K, Irie K, Orito K, Egawa T, Kitamura Y, Uchida N, Nishimura R, Egashira N, Iwasaki K, Fujiwara M (January 2008). "Cannabidiol potentiates pharmacological effects of Delta(9)-tetrahydrocannabinol via CB(1) receptor-dependent mechanism". Brain Research. 1188: 157–64. doi:10.1016/j.brainres.2007.09.090. PMID 18021759.
A CNN program that featured Charlotte's Web cannabis in 2013 brought increased attention to the use of CBD in the treatment of seizure disorders. Since then, 16 states have passed laws to allow the use of CBD products with a doctor's recommendation (instead of a prescription) for treatment of certain medical conditions. This is in addition to the 30 states that have passed comprehensive medical cannabis laws, which allow for the use of cannabis products with no restrictions on THC content. Of these 30 states, eight have legalized the use and sale of cannabis products without requirement for a doctor's recommendation.