Some users speculate about appropriate dosages or methods of application—including whether or not a small amount of THC boosts CBD’s effects, or whether different methods of administration lead to quicker or more significant effects. Some CBD producers also claim that it has a cumulative effect, and so needs to be used regularly to produce a benefit. But Grant says it’s tough to say at this point exactly how people should (or shouldn’t) be using CBD.
HV = healthy volunteers; DBP = double-blind placebo; SAD = social anxiety disorder; HC = healthy controls; THC = Δ9-tetrahydrocannabinol; STAI = Spielberger’s state trait anxiety inventory; VAMS = visual analog mood scale; BP = blood pressure; SPST = simulated public speaking test; SCR = skin conductance response; SPECT = single-photon emission computed tomography; SSPS-N = negative self-evaluation subscale; HR = heart rate; VAS = visual analog scale, CBD = cannabidiol
This turn is due to a comprehensive 2015 study aimed at two notoriously difficult manifestations of epilepsy – Dravet syndrome and Lennox-Gastaut syndrome – most often encountered in children. Seizure frequency was found to decrease between 54 percent and 67 percent for the six months cannabidiol medication was used, although a small part of individuals did not continue after three months, as their condition did not improve.
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.
If CBD-dominant products alone are not enough to treat a particular case, products with a higher ratio of THC are sometimes recommended to better manage pain. For day use, more stimulating, sativa varieties with higher concentrations of myrcene could be added to the formula. In general, for pain, and especially for evening and nighttime, indica strains are favored for their relaxing, sedative effect. A person without experience with THC should use caution and titrate slowly up to higher doses. Research as well as patient feedback have indicated that, in general, a ratio of 4:1 CBD:THC is the most effective for both neuropathic and inflammatory pain. Each individual is different, however—for some, a 1:1 ratio of CBD:THC can be more effective, and others prefer a high-THC strain when it can be tolerated. Each patient’s tolerance and sensitivity will differ, and through titration the correct strain and ratio combination can be found.
CBD oil’s role in cancer treatment still needs more research, but what is available is looking promising. According to the American Cancer Society, CBD oil can slow growth and spread of some kinds of cancer (in animals). Because it fights oxidative stress and inflammation (and both are linked to cancer) it makes sense that CBD oil could help fight cancer cells.
The reduction of iNOS and reactive oxygen species by CBD, along with the reduction of lipid peroxidation, shows the important therapeutic action of CBD in reduction of colonic inflammation by indirect reduction of oxidative damage. In addition, the dysregulation of the interleukins IL-1B and IL-10 is a well-known disruption caused by irritable bowel disease (IBD). The restoration of these interleukins to normal behavior by CBD, although the specific pathway is unknown, is another important therapeutic action that CBD has on reduction of colonic inflammation.

CBD also blocked reconsolidation of aversive memories in rat [76]. Briefly, fear memories, when reactivated by re-exposure (retrieval), enter into a labile state in which the memory trace may either be reconsolidated or extinguished [97], and this process may be pharmacologically modulated to achieve reconsolidation blockade or extinction. When administered immediately following retrieval, CBD prevented freezing to the conditioned context upon further re-exposure, and no reinstatement or spontaneous recovery was observed over 3 weeks, consistent with reconsolidation blockade rather than extinction [76]. This effect depended on CB1R activation but not 5-HT1AR activation [76].
Would I say that CBD oil has fundamentally changed my life? No. But per the Charlotte's Web website, this is the typical first experience. "Anyone who has ever started a new vitamin or supplement routine knows the short answer to how long it takes to kick in is—'it depends,'" reads the article on what to expect from hemp oil. "For many newcomers, they're not sure what to imagine, or some anticipate a huge change right away. For most of us, though, dietary supplements take time."