Desk research against primary sources. Figures are traced to the issuing UAE authority and linked on the page.
Zero tolerance means the law does not distinguish between quantities, intent, or where the substance was consumed — a trace amount from legal use abroad that shows up in a bloodstream test is treated the same as possession discovered locally, because the test result is the evidence, not the circumstances behind it. There is no threshold below which a positive result is disregarded.
The absence of a medical exception means a prescription valid in your home country carries no weight here; CBD marketed as legal or non-psychoactive elsewhere is judged by what is actually in the product, not by its label. With a minimum of 4 years imprisonment attached to first offences, the safest assumption when travelling is that nothing in this category should come with you, rather than relying on a home-country legal status to translate.