Hash oils seized in the 1970s had a THC contents ranging from 10 to 30%. The oil available on the U.S. West Coast in 1974 averaged about 15% THC. Samples seized across the United States by the Drug Enforcement Administration over an 18-year period (1980–1997) showed that THC content in hashish and hashish oil averaging 12.9% and 17.4%, respectively, did not show an increase over time. The highest THC concentrations measured were 52.9% in hashish and 47.0% in hash oil. Hash oils in use in the 2010s had THC concentrations as high as 90% and other products achieving higher concentrations 
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Although some studies have demonstrated the potential effect of CBD on sleep behavior, research about the effects of CBD on the slow wave sleep (SWS) of humans with regular sleep is still lacking. The impact of CBD on sleep, possible side-effects or the advantages of lack of them, including objective measures through polysomnography, has not yet been investigated. Thus, the objective of the present study was to assess the effect of the acute administration of an anxiolytic dose (300 mg, Zuardi et al., 1993, 2017) of CBD on sleep in healthy volunteers by means of cognitive and subjective measures and polysomnography exams.
Vaney C., Heinzel-Gutenbrunner M., Jobin P., Tschopp F., Gattlen B., Hagen U., et al. (2004). Efficacy, safety and tolerability of an orally administered cannabis extract in the treatment of spasticity in patients with multiple sclerosis: a randomized, double-blind, placebo-controlled, crossover study. Mult. Scler. 10 417–424. 10.1191/1352458504ms1048oa [PubMed] [Cross Ref]
CBD likewise communicates with a neurotransmitter called GABA (gamma-aminobutyric corrosive). GABA transfers messages from one brain cell, or neuron, to another; that message usually is “Back off” or “stop pushing.” GABA advises the body when it’s a great opportunity to shut down, and since a huge number of neurons in the cerebrum react to GABA, the impacts include lessening anxiety, quieting the sensory system, assisting with rest, unwinding the muscles.
I found I was too groggy during work hours if, on a typical day, I took CBD in the morning and at night. A dose of 25 milligrams an hour before going to bed, plus occasional topical use, has become my norm. The main exception is after an especially long or hard weekend run, when I have an additional 25 milligrams if I’m planning to mostly lounge about the house.
Subjectively, I’d say it took around 15 to 20 minutes before I noticed some sort of an effect; could’ve been shorter or longer (I didn’t have a timer out). I wasn’t stressed or anxious prior to taking the capsule, so there may not have been as much neurophysiological contrast. That said, I noticed that I felt psychologically more relaxed and as if I stopped thinking critically about every little thing.
Great Article on CBD – Did you learn anything about how the efficacy of the CBC is affected by the source species? e.g. Cannabis vs Hemp. Also, Sativa vs. Indica. All of the referenced studies just state CBC, do you know what is the typical source of CBD used in these type of studies? CBC oil from Hemp is readily and cheaply available on the internet from many companies, however I have read that the efficacy of Hemp derived CBD is less than from Cannabis. Any thoughts? Thanks!
I have used the oil, but have found that there is nothing like smoking the flower (bud) I use the Jellyfish brand (CBD, NOT THC) Which is 18.5 CBD and I believe 0.5 TCH. In other words, it is impossible to get you high. There is no psycho-affective effect. When I smoke, just two good hits and I’m good for four or five hours. I suffer from Derealization. Even though it does not make it better, it does not make it worst. What is important is that it calms me down from head to toe. Made a huge difference in my life.
If the lack of sleep turns into a chronic state, it can trigger insomnia, which may further lead to serious neurological conditions. People suffering from insomnia often find themselves in a vicious circle; they are constantly exposed to stress and thus start to have anxious thoughts over time; chronic stress and anxiety trigger insomnia; insomnia leads to depression.
Administration of CBD reduced the anxiogenic effects of THC, suggesting that it is capable of decreasing anxiety in animal models. It was also documented that standalone CBD treatment reduced expression of c-Fos in the central nucleus of the amygdala. Reduction in c-Fos is understood to yield anxiolytic effects – possibly another mechanism by which cannabidiol attenuates symptoms of anxiety.
Similarly, though CBD oil is technically illegal on the federal level, it is sold freely online and in stores even here in New Jersey. Erica McBride, executive director of the National Hemp Association in Washington, said there have been instances in states where pot hasn't been legalized where CBD oil was confiscated at the post office or people possessing it were arrested, but it's “very rare.”
Guzmán leads me around his cramped lab—centrifuges, microscopes, beakers, petri dishes, a postdoc researcher in a white smock extracting tissue from a mouse corpse pinned under bright lights. It’s your typical bioresearch lab, except that everything is devoted to the effects of cannabis on the body and brain. The lab focuses not just on cancer but also on neurodegenerative diseases and on how cannabinoids affect early brain development. On this last topic the Guzmán group’s research is unequivocal: Mice born of mothers regularly given high doses of THC during pregnancy show pronounced problems. They’re uncoordinated, have difficulty with social interactions, and have a low anxiety threshold—they’re often paralyzed with fear at stimuli, such as a cat puppet placed near their cage, that don’t upset other juvenile mice.
That's why it's being increasingly used as a sleep aid, she says. "The major reason why most people don't sleep is because they're stressed out, they're anxious, they can't shut their brain off," she explains. "What CBD does is calm down your body's stress response and bring those cortisol and adrenaline levels back to baseline." Science is scant, but what studies we do have back that up: CBD may increase the amount of time you sleep, according to an animal study published in the Journal of Psychopharmacology, and improve insomnia, research in the journal Current Psychiatry Reports found.
"It's important to know that the research in this area is in its infancy, partly because we haven't really understood much about CBD until relatively recently," said Marcel Bonn-Miller, an adjunct assistant professor at the University of Pennsylvania Perelman School of Medicine. He pointed out that the classification of marijuana as a Schedule 1 drug by the DEA makes it difficult to get material to use in laboratory studies. Schedule 1 drugs have a high potential for abuse, according to the DEA, and are illegal under federal law.
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