The vast majority of CBD oils come in bottles measuring either 15 milliliters (mL), or 0.5 ounces; or 30 mL, or 1 ounce. However, CBD concentration is more important than bottle size. Concentration refers to the ratio of hemp oil solution (measured in mL) compared to the amount of CBD cannabinoid (measured in milligrams, or mg). A 15-mL bottle may contain 100 mg of CBD, 300 mg, 500 mg, or more. The higher the mg amount, the stronger the CBD oil will be. For this reason, the ‘mg’ measurement is also referred to as the oil’s strength; i.e., 400-mg oil might be called 400-strength oil.
Dr. Robert Carson is a pediatric neurologist at Vanderbilt University who has evaluated the effectiveness of CBD supplements in kids with seizures. He says the supplements can be beneficial for these children. However, he says, if the FDA follows its advisory panel's advice and approves a pharmaceutical-grade CBD drug, that would open up a new treatment option by delivering a high-quality, consistent dose of CBD.
Due to the anti-inflammatory properties of cannabidiol, insulin resistance (the chief metabolic problem for patients with type 2 diabetes) is reduced, leading to a better prognosis thanks also to the lower incidence of dead tissue. Ever since the discovery of CBD in the 1990’s, speculation existed to its effect on other types of receptors (not just cannabinoid receptors) which could be manipulated and included in the treatment of some cardiovascular diseases like atherosclerosis. In light of these speculations, researchers at the University of Tel Aviv (walking in the footsteps of the “father” of cannabinoid research, Dr. Raphael Mechoulam) demonstrated a 30 percent blood flow increase in rodents with areas of dead tissue in the heart muscle.
Relevant studies in animal models are summarized in chronological order in Table Table1.1. CBD has been studied in a wide range of animal models of general anxiety, including the elevated plus maze (EPM), the Vogel-conflict test (VCT), and the elevated T maze (ETM). See Table Table11 for the anxiolytic effect specific to each paradigm. Initial studies of CBD in these models showed conflicting results: high (100 mg/kg) doses were ineffective, while low (10 mg/kg) doses were anxiolytic [59, 60]. When tested over a wide range of doses in further studies, the anxiolytic effects of CBD presented a bell-shaped dose–response curve, with anxiolytic effects observed at moderate but not higher doses [61, 90]. All further studies of acute systemic CBD without prior stress showed anxiolytic effects or no effect [62, 65], the latter study involving intracerebroventricular rather than the intraperitoneal route. No anxiogenic effects of acute systemic CBD dosing in models of general anxiety have yet been reported. As yet, few studies have examined chronic dosing effects of CBD in models of generalized anxiety. Campos et al.  showed that in rat, CBD treatment for 21 days attenuated inhibitory avoidance acquisition . Long et al.  showed that, in mouse, CBD produced moderate anxiolytic effects in some paradigms, with no effects in others.
It’s a truism to state that pain is an inevitable part of life. And it’s true that we all, from time to time, experience pain that is short-lived and treatable. But those who deal with chronic pain know the debilitating, life-sucking reality of this condition. And traditional medications often come with long lists of side effects which can be as debilitating as the pain itself.
And then I woke up on the concrete, a worried crowd gathered around me. “You had a seizure,” my friend said gently as I blinked my eyes, trying to process this new information. I remember it was warm that night because I was wearing a sundress, and when I finally regained consciousness my first worry was that my dress flew up and everyone could see my underwear.
“The brain has these receptors that respond to endocannabinoids, which are neurotransmitters that are naturally produced in the body and brain,” says Jerald Simmons, a neurologist at Houston’s Comprehensive Sleep Medicine Associates. “Some of the cannabinoids in the marijuana plant are very similar to the endocannabinoids in the brain, and they act on the same receptors.”
Cannabidiol oil is extracted from the varieties of cannabis plants that have CBD occurring naturally in large amounts and THC in low amounts. To ensure a high concentration of CBD in the oil, a specialized process is used to extract the compound. The oil contains other compounds like terpenes, omega-3 fatty acids, amino acids, chlorophyll, vitamins, and phytocannabinoids like cannabigerol, cannabichromene, cannabidivarin, and cannabinol.