In 2013, the American Journal of Medicine published a study that highlighted the impact of marijuana use on glucose, insulin and insulin resistance among U.S. adults. The study included 4,657 adult men and women from the National Health and Nutritional Examination Survey from 2005 to 2010. Of the participants, 579 were current marijuana users and 1,975 were past users. The researchers found that current marijuana use was associated with 16 percent lower fasting insulin levels. They also found significant associations between marijuana use and smaller waist circumferences, a factor connected to the onset of diabetes symptoms. (17)

5-HT1A agonist: 5-HT1A is a subtype of the serotonin receptor, which is important because anxiety and depression can sometimes be treated with medications that target the serotonin system. This is why drug companies developed selective serotonin reuptake inhibitors (SSRIs) like Prozac and Zoloft. SSRIs work by blocking reabsorption of serotonin in the brain, which increases availability of serotonin in the synaptic space. This helps brain cells transmit more serotonin signals, which can reduce anxiety and boost mood in certain cases (although the full biological basis for this is more complicated and not fully understood).
Sativex, a cannabis plant–derived oromucosal spray containing equal proportions of THC and CBD, has been approved in a number of countries for use to treat specific types of pain. Numerous randomized clinical trials have demonstrated the safety and efficacy of Sativex for treatment of central and peripheral neuropathic pain, rheumatoid arthritis, and cancer pain. [386]
For people who suffer from insomnia, constant anxiety during the night or simply struggle to get a sound, restful night of undisturbed sleep, cannabis sativa essential oil may work like a charm. However, according to a research report published by Dr. Ethan Russo, Director of Research for the International Cannabis and Cannabinoids Institute, terpenoids produce an “entourage effect”.
Researchers have also found that ashwagandha helps support the growth of nerve cell dendrites, which allow these cells to receive communications from other cells, and that ashwagandha helps promote the growth of both normal and damaged nerve cells, suggesting that the herb may boost healthy brain cell function as well as benefit diseased nerve cells. So we’re talking a “nootropic” smart drug type effect. 
Could cannabidiol help prevent tumors and other cancers before they grow? A 2012 study showed that animals treated with CBD were significantly less likely to develop colon cancer after being induced with carcinogens in a laboratory.[187] Several studies had already shown that THC prevents tumors and reduces them, including one in 1996 on animal models that found that it decreased the incidence of both benign and hepatic adenoma tumors.[188] In 2015, scientists analyzed the medical records of over eighty-four thousand male patients in California and found that those who used cannabis, but not tobacco, had a rate of bladder cancer that was 45 percent below the norm.[189] Topical products can be used to treat and prevent skin cancers. Continuing research is focused on the best ratio of CBD to THC and the most effective dose level in cancer prevention and treatment.

Several studies assessed CBD using contextual fear conditioning. Briefly, this paradigm involves pairing a neutral context, the conditioned stimulus (CS), with an aversive unconditioned stimulus (US), a mild foot shock. After repeated pairings, the subject learns that the CS predicts the US, and subsequent CS presentation elicits freezing and other physiological responses. Systemic administration of CBD prior to CS re-exposure reduced conditioned cardiovascular responses [63], an effect reproduced by microinjection of CBD into the BNST, and partially mediated by 5-HT1AR activation [79]. Similarly, CBD in the prelimbic cortex reduced conditioned freezing [70], an effect prevented by 5-HT1AR blockade [87]. By contrast, CBD microinjection in the infralimbic cortex enhanced conditioned freezing [70]. Finally, El Batsh et al. [80] reported that repeated CBD doses over 21 days, that is chronic as opposed to acute treatment, facilitated conditioned freezing. In this study, CBD was administered prior to conditioning rather than prior to re-exposure as in acute studies, thus further directly comparable studies are required.

My father was diagnosed with Alzheimer’s and vascular dementia three years ago. In the normal western medical manner he is currently on quite a lot of medication. But with side effects, mum and I who are caring for him at home are uncertain as to whether his behaviours are indeed symptoms of his dementia or the medication. Dad is unable to communicate, demonstrates intense anxiety and has sporadic sleep patterns.
CBD shows promise in the treatment of anxiety disorders, according to a report published in the journal Neurotherapeutics in 2015. Looking at results from experimental research, clinical trials, and epidemiological studies, the report’s authors found evidence that CBD may help treat generalized anxiety disorder, panic disorder, social anxiety disorder, obsessive-compulsive disorder, and post-traumatic stress disorder. However, the authors caution that human-based research on CBD and anxiety is fairly limited at this point.
I am acting caregiver for my wife who for the past 3 years has suffered from acute anxiety and depression which all started with a fall resulting in a broken hip. She has since then broken the other hip. At age 74 now the anxiety is detrimental to her recovery as she feels she can’t preform the smallest task. I appreciate your site I just finished reading as I am trying to educate myself on this approach to help to regain her self confidence. Thanks for your time snd efforts are help people like us. John
Relevant studies are summarized in Table ​Table2.2. The anxiolytic effects of CBD in humans were first demonstrated in the context of reversing the anxiogenic effects of THC. CBD reduced THC-induced anxiety when administered simultaneously with this agent, but had no effect on baseline anxiety when administered alone [99, 100]. Further studies using higher doses supported a lack of anxiolytic effects at baseline [101, 107]. By contrast, CBD potently reduces experimentally induced anxiety or fear. CBD reduced anxiety associated with a simulated public speaking test in healthy subjects, and in subjects with SAD, showing a comparable efficacy to ipsapirone (a 5-HT1AR agonist) or diazepam [98, 105]. CBD also reduced the presumed anticipatory anxiety associated with undergoing a single-photon emission computed tomography (SPECT) imaging procedure, in both healthy and SAD subjects [102, 104]. Finally, CBD enhanced extinction of fear memories in healthy volunteers: specifically, inhaled CBD administered prior to or after extinction training in a contextual fear conditioning paradigm led to a trend-level enhancement in the reduction of skin conductance response during reinstatement, and a significant reduction in expectancy (of shock) ratings during reinstatement [106].
At present, we have the following classification of cannabinoids: endocannabinoids (produced naturally in the body, mainly from fatty acid precursors), phytocannabinoids (compounds that have a plant origin, with the cannabis plant being the best-studied source of phytocannabinoids though not the only one), and artificial cannabinoids (created while studying THC, to garner the benefits of marijuana without the recreational component).