If you’re taking the oil in liquid form, one dropperful of a low concentration product (100 mg CBD per fluid ounce) will provide about 3 mg of CBD per dropperful — not enough to notice any significant effects. A dropperful of the medium grade product (500 mg of CBD per fluid ounce) will deliver about 15 mg of CBD — a good starting dose. And a dropperful of a high concentration product (1500 mg CBD per fluid ounce) will provide about 50 mg of CBD per dropperful.
It's important to know that although THC and CBD are the most studied components of cannabis, there are many more chemical compounds found within the plant, such as cannabigerol (CBG), cannabichromene (CBC), cannabidivarin (CBDV), tetrahydrocannabivarin (THCV), terpenes, and flavonoids. While there is still much to learn about these other chemicals, researchers in Israel have discovered that whole-plant cannabis extracts that contain these other chemicals are more beneficial than isolated extracts that contain just CBD or THC.

One of the most experienced practitioners in this field is Los Angeles physician Bonni Goldstein, who has used the compound to treat dozens of children with intractable epilepsy. She says about half of these patients have seen a significant drop in the number of seizures. “Used in the right way, with the right patient, CBD is extremely powerful,” she says.
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