These studies conclude that “the higher efficiency of plant extract can be explained by additive or synergistic interactions between CBD, terpenes, and the minor phytocannabinoids or non-cannabinoids presented in the extracts. …because other phytocannabinoids, including Tetrahydrocannabivarin, Cannabigerol and Cannabichromene, as well as mono- and sesquiterpenes, exert additional effects of therapeutic interest and the therapeutic synergy observed with plant extracts results in the requirement for a lower amount of active components, with consequent reduced adverse effects.”
From anecdotal evidence in humans and from animal studies, CBD appears to affect the way we experience pain, inflammation, and anxiety. “Scientists have identified a number of receptors in the nervous system where CBD acts,” says Orrin Devinsky, MD, professor of neurology, neurosurgery, and psychiatry at NYU Langone. “It’s established that CBD has anti-inflammatory properties and can increase activity at some serotonin [the feel-good neurotransmitter] receptors.”

Not much, as far as humans are concerned—at least not yet. The vast majority of studies have been on animals, as of yet, and there are few high-quality studies on humans. Even the oil’s effect on pain—something that CBD oil is popularly used for—isn’t proven. “The studies available are small or not well designed,” says Dr. Devinsky. “There’s a lot of religion out there, but not a lot of data.”

'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.’


And without high-quality trials, experts don’t know how much is best for a given purpose. The staff at Roth’s dispensary told her, “Try some once or twice a day and see what happens.” (Half a dropper’s worth was a good amount for her.) One thing scientists feel confident about is that CBD is not dangerous. It won’t damage vital organs even at doses as high as 5,000 mg a day, Marcu says, and nobody has died from simply overdosing on a cannabis product.


Everything you need to know about marijuana (cannabis) Marijuana, or cannabis, is the most commonly used illicit drug in the world. It alters the mood and affects nearly every organ in the body. With at least 120 active compounds, marijuana may have health benefits as well as risks. We describe these, addiction, and withdrawal. Learn more about cannabis here. Read now
×