How fast CBD oil works depends on every individual a bit. It could well be that you experience an effect after 15 minutes and some others only after an hour. That is why it is essential that when you start working with CBD oil, you decide for yourself when you feel the CBD oil will work. This way, you can determine the dosage and effect. Handle it carefully, find out what is the best dosage for you, and also make sure you know when the CBD oil starts to work for you.