CBD oil tinctures are consumed via sublingual administration. Oils are placed under the tongue and held for 1-2 minutes before being swallowed. The molecules carried in the CBD oil are absorbed into the bloodstream via the mucous membranes found under the tongue making them quicker acting, with only a slightly shorter duration than capsules. Sublingual application has an average onset time of 20-40 minutes before the effects are felt. The duration of the effects lasts for up to 6 hours.