Glamping said "I work shift work so my sleep schedule is different every week. I take a full dropper once a day, about 15-20 minutes before I want to sleep. It took about a week or two to start working. "
Maybe it's my ignorance showing, but if you had to take it for a couple of weeks before it started working, are you sure it's the oil that did it? Could it maybe be more a case of you've developed new habits surrounding the intake of the CDB (also, the *belief* that it will help) that would facilitate falling asleep?
My understanding is that the half-life of CBD is not well measured and highly variable, from as little as 18 hours to as much as 7 days. At the high end of the spectrum, yes it would take time for the accumulation of the drug to impact you but at the low end there shouldn't be much accumulation.