Cannabis plant has many varieties, and each one has a different makeup. Some may have THC which is responsible for making you high. CBD, on the other hand, doesn’t make you high; it has some therapeutic effect. If you had taken THC in the past three months, then your body can still have it in you. When you take CBD infused products, some other compounds also come along during CBD extraction, which also includes THC. This kind of CBD is called Full spectrum CBD, and if you want to stay clean in drug tests, then you should be looking for CBD isolate.
CBD retention in the blood depends on different factors like frequency of the usage, potency of it, genetics of the user, and the way through which it was consumed. A study in 2014 published in Epilepsy Journals found that CBD, when taken orally stayed in the body for 1-2 days. Another study in 2012 found that for intravenous administration, the CBD took 18-33 hours to complete its life. If CBD is consumed through smoking, it will take 27-35 hours, and through oral administration, it takes 2-5 days to complete its life. This information can be very helpful for pharma companies when formulating the dosage of CBD for a different health condition.