However, when compared to skin-care pillar ingredients like retinols and vitamin C, the research behind CBD's efficacy in skin care (especially beyond the realms of being a temporary topical pain reliever) is still relatively in its infancy. "There is limited data to suggest that CBD may decrease oil production when applied topically," says Joshua Zeichner, director of cosmetic and clinical research at Mount Sinai Hospital, who explains that unlike marijuana, which contains psychoactive THC, hemp seed oil is a common source of naturally anti-inflammatory cannabinoids — which is what ends up in all of those lotions and potions. "Hemp seed oil also acts as an emollient to smooth rough cells on the skin's surface and offers moisturizing benefits," he adds.
There is a strong sedative quality to CBD hemp oil, making it a popular remedy for people with insomnia, sleeplessness, interrupted sleep, post-traumatic stress disorder, restless leg disorder, and other night-time issues. Dr. Scott Shannon, Assistant Clinical Professor of Psychiatry at the University of Colorado School of Medicine, USA, published a report in the Permanete Journal, in which he recommended either inhaling a small amount of CBD oil, applying it to one’s chest, or even putting a few drops on one’s pillow to help get a good night’s sleep.
Most human studies of CBD have been done on people who have seizures, and the FDA recently approved the first CBD-based drug, Epidiolex, for rare forms of epilepsy. Clinical trials for other conditions are promising, but tiny. In one Brazilian study published in 2011 of people with generalized social anxiety disorder, for example, taking a 600-mg dose of CBD (higher than a typical dose from a tincture) lessened discomfort more than a placebo, but only a dozen people were given the pill.
The immediate and powerful effects of THC are explained because of the special affinity it has with the CB1 type receptors, which mediate crucial processes in the brain. The less prominent (but no less important) action of CBD was explained, at least for a while, by hypothesizing that it binds to CB2 type receptors, hence its more diffuse manner of exercising changes in the body. Early on, the antipsychotic effects of cannabidiol were observed, an aspect which seemed to be in consonance with this initial hypothesis.
More human studies are needed to fully understand the range of risks and side effects that CBD oil may cause. Studies of CBD oil aren’t common. This is partially because Schedule 1 substances like cannabis are highly regulated, causing some obstacles for researchers. With the legalization of marijuana products, more research is possible, and more answers will come.
'If the Patient Information Leaflet that comes with your medication says to avoid grapefruit juice, for instance, then do not take CBD, as the same type of interaction can affect circulating blood levels of your medicine. Even if the leaflet does not mention grapefruit juice, you should still check with your doctor before taking CBD. You should also not take CBD if you are pregnant or breastfeeding.’
“Buying from a reputable manufacturer is crucial, because it matters how the plant is cultivated and processed,” Dr. Maroon says. One clue that a company is cutting corners: too low a cost. Good CBD is pricey—a bottle of high-quality capsules is sold in Cohen’s office for $140. But for many, it’s worth the money. Roth spent $60 on her tiny bottle. But when her energy returned the day she started taking CBD, she decided that was a small price to pay.
‘The media has no doubt helped drive this popularity,’ says Dr Sarah Brewer, medical director at Healthspan. ‘However, the main drive is because people who take it experience the benefits very quickly, and “word of mouth” is a powerful thing. CBD oil also has such a wide range of benefits, reducing anxiety, promoting relaxation, ensuring a good night’s sleep, reducing pain perception and improving general feelings of wellbeing. It therefore appeals to a wide range of people.’
Putting this in perspective, eating a portion of grapefruit would have a similar effect on the aforementioned liver enzymes. So neutralizing P450 enzymes should be viewed as a minor side effect of cannabidiol. However, if you are taking pharmaceutical drugs and wish to take CBD, you should discuss any potential complications regarding reduced P450 enzyme activity with your doctor and/or pharmacist.