We provide high quality CBD natural oils in various CBD concentrations. CBD 15% oil is one of the strongest CBD oils to date. CBD oil 15% is a CBD oil that follows the strictest European production standards.It contains no additives, chemicals or other substances and is made from naturally grown hemp. CBD users who want the strongest and purest CBD oil can now benefit from the high CBD 15% oil concentration without the disadvantages of some other cannabinoid types. How to use CBD 15% natural oil? The recommended dose for CBD oil 15% is 3-4 drops, up to three times a day. Keep the CBD oil in a dark and cool place after opening the bottle. Storing CBD oil in the refrigerator is the safest way to ensure it stays fresh for a long time.