What is CBD oil for? What is known and what is not

CBD oil is an extract of industrial hemp that contains cannabidiol (CBD), dissolved in a vegetable carrier oil. CBD is one of the more than one hundred cannabinoids the plant makes, and it is not THC, the compound that causes the “high”. The difference is explained in CBD vs THC: what sets them apart, and the basics are in What is CBD: a beginner's guide.

About a bottle of CBD oil you can state facts: how many milligrams of CBD it holds, in what volume, which type of extract it contains and under which regime it is sold (usually as a cosmetic). What it “does” in the body cannot be stated, and the next sections explain why.

Three things have been written down by institutions, not by sellers.

• One medicine with CBD is authorised in the EU: Epidyolex, authorised in 2019 for seizures in Lennox-Gastaut and Dravet syndromes (together with clobazam) and, from 2021, for those in tuberous sclerosis complex (EMA). It is dispensed on prescription and used under medical supervision; it is not a shop oil.
• The WHO Expert Committee on Drug Dependence concluded in 2018 that pure CBD shows no potential for abuse or dependence, and described the evidence for its use in other situations as preliminary (WHO).
• There is no authorised health claim for CBD in the EU (Regulation (EC) No 1924/2006). A serious seller describes the product's composition and form, not effects on health.

Many people look for the answer to “what is it good for?” in connection with sleep, stress or pain. A shop has no answer it could give: in 2018 the WHO called the evidence preliminary, and the EU has authorised no health claim for CBD. The result of a study with one product and one amount does not carry over automatically to another bottle.

Safety has open parts too. In February 2026 EFSA set only a provisional safe level of intake for CBD as a novel food, about 2 mg a day for a 70 kg adult, and wrote that safety cannot be established for people under 25, for pregnant or breastfeeding women and for people taking medicines. That figure is not a dose and does not apply to cosmetics; the explanation is in Mg and % on a CBD label: how to compare products.

Lists of “CBD oil benefits” are, as a rule, promises that EU law does not allow a seller to make. Before you believe or dismiss one, ask four questions:

• Who says it: an authority (EFSA, EMA, WHO) or a seller?
• Which product it is about: an authorised medicine or a shop extract?
• Who was studied: people, animals or cells in a laboratory?
• What amount and form were used, compared with those on your bottle?

If a shop promises that CBD oil has an effect on health, it is breaking EU rules — a good reason to shop elsewhere.

Two bottles labelled “CBD” can be very different. A few things set them apart, and the numbers are printed on the pack. The details are in the articles on full spectrum, broad spectrum and isolate and on mg and percentages.

The figure on the label is the maker's promise. What was measured is shown by the lab report (COA) of your batch. The steps are in How to read a lab report (COA) in five steps, and how we work is on the Lab testing page. Four quick checks:

• The batch number on the bottle is the same as on the report.
• The report names the laboratory and the method used.
• The measured CBD is close to the figure on the label; a small deviation, usually around ±10 %, is normal.
• THC is given as a number or as “not detected”.

CBD products are sold only to people aged 18 and over and are kept out of children's reach. Beyond that, four situations matter in particular:

• Medicines: CBD is processed by liver enzymes that also process many medicines. The leaflet of the medicine with CBD, Epidyolex, warns about interactions and about raised liver enzymes. If you take medicines or have a liver condition, ask your doctor or pharmacist.
• Pregnancy and breastfeeding: EFSA could not establish safety. The doctor decides, not the label.
• Age: under 25, EFSA could not establish safety.
• Drug tests: tests look for THC, not CBD. A full spectrum extract contains traces of THC; isolate and broad spectrum should have no detectable THC, but even then there is no guarantee. Details in CBD vs THC.

In Romania CBD is not a narcotic — the Court of Justice of the EU ruled so in the Kanavape case (C-663/18) — and the law controls THC. CBD oils are usually sold as cosmetics. CBD added to food and supplements is a “novel food” (Regulation (EU) 2015/2283) and, as of October 2026, has no EU authorisation yet. The full picture is in Is CBD legal in Romania?

If you are choosing a product, start with the numbers on the label: Your first CBD oil: what to check before you buy takes you through them one by one. CBD oils and capsules are in the catalogue; on a product page you see the milligrams of CBD, the volume and the regime.