In nature, Cannabis ruderalis typically has the lowest levels of THC, Cannabis sativa has a higher level of THC than it has CBD, and Cannabis indica has a higher level of CBD than it has THC. However, since man has been cultivating cannabis (and especially Cannabis sativa) for thousands of years, the effects of artificial selections have led to several different types of cannabis even within the same species, depending on the purpose the cannabis was cultivated for.
To make this more concrete, let’s use an example here. This is a high-CBD hemp oil product made from industrial hemp. It has a concentration of CBD between 18% and 24%. This means that it has 18%–24% parts CBD dissolved in the actual oil, which is composed by other substances. So 18%–24% is pure CBD, and the rest are hemp oil extracts and other fatty acid substances.
^ Jump up to: a b c Boggs, Douglas L; Nguyen, Jacques D; Morgenson, Daralyn; Taffe, Michael A; Ranganathan, Mohini (September 6, 2017). "Clinical and preclinical evidence for functional interactions of cannabidiol and Δ9-tetrahydrocannabinol". Neuropsychopharmacology. 43 (1): 142–154. doi:10.1038/npp.2017.209. ISSN 0893-133X. PMC 5719112. PMID 28875990.
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.
Preliminary research indicates that cannabidiol may reduce adverse effects of THC, particularly those causing intoxication and sedation, but only at high doses. Safety studies of cannabidiol showed it is well-tolerated, but may cause tiredness, diarrhea, or changes in appetite as common adverse effects. Epidiolex documentation lists sleepiness, insomnia and poor quality sleep, decreased appetite, diarrhea, and fatigue.