The oral bioavailability of CBD is 13 to 19%, while its bioavailability via inhalation is 11 to 45% (mean 31%). The elimination half-life of CBD is 18–32 hours. Cannabidiol is metabolized in the liver as well as in the intestines by CYP2C19 and CYP3A4 enzymes, and UGT1A7, UGT1A9, and UGT2B7 isoforms. CBD may have a wide margin in dosing.
^ Scott Gottlieb (July 30, 2019). "The CBD craze is getting out of hand. The FDA needs to act". The Washington Post. Retrieved July 31, 2019. ... many of the compound’s expansive benefits are fanciful, and in fact, the sale of much of the product is illegal under current law. The Food and Drug Administration must act to make sure commercial interests don’t strip away any legitimate value that the compound might have.
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Since industrial hemp is naturally rich in CBD and has been bred to have only trace amounts of THC, many people today are turning to industrial hemp products as an alternative to medical marijuana. Medical marijuana is not legal in all states in the US and many countries worldwide, while products made from industrial hemp can be a safe and legal alternative. You can get many of the same beneficial effects of medical marijuana from industrial hemp products without getting “high.”
Take precautionary measures to ensure battery safety, especially if you are using the 18650 vape batteries. Don’t use a charger other than the one recommended by the manufacturer; don’t overcharge or over-discharge the batteries; store the batteries which are not in use in a safe place (preferably in a plastic case); and don’t carry loose batteries in your pocket.