Hemp-based CBD, on the other hand, is most often sourced from legal industrial hemp plants that contain very small amounts of THC. This type of CBD can be grown under the United States Farm Bill. If you are going to be buying oils for anxiety from an online seller, for example, then you will likely be purchasing a product that has been sourced from hemp, rather than marijuana. This is perfectly fine, because even though industrial hemp lacks the mind-altering THC compound, it contains functional amounts of CBD.
The definitions of hemp and marijuana can get pretty confusing, but for basic purposes, marijuana contains high levels of THC, and hemp contains low levels of THC. The ratios of CBD to THC in hemp oil can vary, depending on the product and the specific plant the oil was extracted from. CBD oil, a concentrated version of the cannabidiol compound, is typically derived from hemp but can be extracted from marijuana as well. CBD oil products on the market have varying levels of CBD and THC. Many have little to no THC, while some contain small amounts.
In a series of placebo-controlled studies involving 15 healthy volunteers, Fusar-Poli et al. investigated the effects of CBD and THC on task-related blood-oxygen-level dependent functional magnetic resonance imaging activation, specifically the go/no-go and fearful faces tasks [109, 110]. The go/no-go task measures response inhibition, and is associated with activation of medial prefrontal, dorsolateral prefrontal, and parietal areas . Response activation is diminished in PTSD and other anxiety disorders, and increased activation predicts response to treatment . CBD produced no changes in predicted areas (relative to placebo) but reduced activation in the left insula, superior temporal gyrus, and transverse temporal gyrus. The fearful faces task activates the amygdala, and other medial temporal areas involved in emotion processing, and heightened amygdala response activation has been reported in anxiety disorders, including GAD and PTSD [113, 114]. CBD attenuated blood-oxygen-level dependent activation in the left amygdala, and the anterior and posterior cingulate cortex in response to intensely fearful faces, and also reduced amplitude in skin conductance fluctuation, which was highly correlated with amygdala activation . Dynamic causal modeling analysis in this data set further showed CBD reduced forward functional connectivity between the amygdala and anterior cingulate cortex .
Although cannabis can be used to make marijuana, CBD itself is non-psychoactive—meaning that it doesn’t get you high the way smoking or eating cannabis-related products containing THC (the plant's psychoactive compound) can. Still, there’s a lot doctors don’t know about CBD and its effects on the body, and a lot consumers should understand before trying it.
Cannabinoids are facilitative of the process of bone metabolism—the cycle in which old bone material is replaced by new at a rate of about 10 percent per year, crucial to maintaining strong, healthy bones over time. CBD in particular has been shown to block an enzyme that destroys bone-building compounds in the body, reducing the risk of age-related bone diseases like osteoporosis and osteoarthritis. In both of those diseases, the body is no longer creating new bone and cartilage cells. CBD helps spur the process of new bone-cell formation, which is why it has been found to speed the healing of broken bones and, due to a stronger fracture callus, decrease the likelihood of re-fracturing the bone (bones are 35–50 percent stronger than those of non-treated subjects).
CBD oil has a wide range of effects on health and has been connected to a diverse number of health problems, ranging from migraines and stress to lack of appetite and sex drive. CBD oil has even been connected to reducing the risk of certain cancers, as well as reducing pain, improving the conditions of the heart, and helping people get a good night’s sleep. There are a number of ways to use CBD oil, depending on what you want relief from.