Relevant studies are summarized in Table ​Table3.3. In a SPECT study of resting cerebral blood flow (rCBF) in normal subjects, CBD reduced rCBF in left medial temporal areas, including the amygdala and hippocampus, as well as the hypothalamus and left posterior cingulate gyrus, but increased rCBF in the left parahippocampal gyrus. These rCBF changes were not correlated with anxiolytic effects [102]. In a SPECT study, by the same authors, in patients with SAD, CBD reduced rCBF in overlapping, but distinct, limbic and paralimbic areas; again, with no correlations to anxiolytic effects [104].

So am I to assume, due to no response/deleted comment that my simple question was too difficult to answer? With all the technical & correct information you have on you GREAT website, can someone (?) not simply correct or acknowledge the FACT the your NOT using nano-particle size product? I am truly interesting (for my wife) in CBD, have done my research, and I love working with numbers which is why if found this discrepancy. Comments welcome, but avoidance is disturbing.
Scientists have made a lot of progress in understanding how CBD produces its calming, pain-reducing, anti-inflammatory effects in the body—and there’s still more to learn. We know that CBD interacts with many different receptors, proteins, and other chemicals in the brain. These interactions create changes in the activity of neurotransmitters, hormones, and other cells throughout the brain and body. Through these interactions, CBD appears to be able to affect many of the body’s functions, from sleep-wake cycles and emotional regulation to inflammation, pain perception, and seizures.
A bit of online digging led me to realize that the active ingredient in Charlotte's Web Everyday Plus Hemp Oil, the product I'd been offered to test, was the chemical compound CBD, which stands for Cannabidiol. Unlike THC, the other crucial compound in hemp and marijuana plants, CBD does not produce the psychoactive effects that make you feel "high"; instead, it actually eases anxiety and makes you less likely to freak out.

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”.
Summary: Early research has found that CBD oil has the potential to reduce chronic pain, anxiety, depression and acne, and may help those overcoming addiction. Its anti-inflammatory properties may also play a role in lowering the risk of diabetes and cardiovascular disease. It has even shown anti-tumor effects and could be effective in inhibiting the progression of cancer and its related symptoms.
I'd recommend a full spectrum as you're getting all of the beneficial compounds from the plant, and they can work synergistically to enhance benefits. Isolate is only CBD, all the other compounds have been stripped away or filtered. Broad Spectrum still contains many of the beneficial effects of Full Spectrum but it still has some compounds (namely THC) stripped from it. You can find a lot of great info at ProjectCBD.org as well.
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].
For relief of immediate symptoms, as in a flare-up of pain, vaporizing or smoking work well. The medication effect is immediate and lasts one to three hours, whereas most ingested products take thirty to sixty minutes before taking effect (faster on an empty stomach) and last six to eight hours. Vaporizers that use a cartridge filled with the CO2 concentrate are highly effective, and these are available in various ratios of CBD to THC. Herbal vaporizers that use the whole plant are also an effective delivery method. Sublingual sprays or tinctures taken as liquid drops also take effect quickly and last longer than inhaled products.
In a small study published in the journal JCI Insight in 2017, researchers observed that CBD may help prevent stress-related changes in blood pressure. For the study, nine healthy male volunteers took a single dose of either CBD or a placebo. Compared to those given the placebo, those treated with CBD had lower blood pressure both before and after experiencing a stressful event.
At first, I was wary. Although I live in Los Angeles, where it seems like there’s a medical marijuana depot on every corner, I’m not one for doing drugs (legal or otherwise). I mean, I don’t even take Advil when I get a headache!  But despite the fact that CBD oil is made from hemp, it doesn’t contain THC. THC is the compound responsible for the “high” that comes with ingesting marijuana. In fact, scientific reviews have proven that CBD “does not interfere with several psychomotor and psychological functions,” and is safe to ingest without any side effects. Let me repeat: YOU WILL NOT GET HIGH FROM CBD!
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”.
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