The relationship between THC and CBD is complex, but in short, CBD appears to minimize some of THC’s undesirable effects, such as paranoia, heart palpitations, and impaired thinking. Compared with THC in isolation, or its synthetic cousins such as Marinol, the combination of THC and CBD has much greater therapeutic value to patients. This phenomenon of cannabis-derived molecules working better together than they do in isolation is commonly referred to as the entourage effect.
As the brain ages, the creation of new neurons slows down significantly. In order to maintain brain health and prevent degenerative diseases, new cells need to be continuously created. A 2008 study showed that low doses of CBD- and THC-like cannabinoids encouraged the creation of new nerve cells in animal models, even in aging brains. CBD also benefits the brain by helping to prevent other nerve-related diseases like neuropathy and Alzheimer’s disease.