Hemp seed oil and CBD oil are not the same product
Hemp seed oil contains almost no cannabinoids. CBD oil is defined by containing them. They come from the same plant, they sit on the same shelf, and one of them costs several times more than the other for reasons that have nothing to do with the bottle.
The confusion is not accidental. «Hemp oil» is a legal, accurate name for a food oil, which means a seller can print it on a bottle that has no CBD in it at all without saying anything untrue.
This page explains what separates the two, how to tell in ten seconds which one you are holding, and what the label has to show before any price comparison means anything.
The one-sentence difference
Hemp seed oil is pressed from the seed. CBD oil is extracted from the flower and leaf.
The seed is not where the plant makes cannabinoids. That single botanical fact produces every other difference below — the price, the label, the legal status and the analysis.
Where the plant actually makes CBD
In the trichomes
Cannabinoids are produced in resin glands concentrated on the flowers and, to a much smaller degree, on the nearby leaves.
Not in the seed, the stalk or the root
A seed is a seed. Pressing it gives you a nutritional oil, rich in fatty acids, with a green colour and a nutty taste — and effectively no cannabidiol.
Why «trace amounts» appear anyway
Analyses of hemp seed oil sometimes report tiny cannabinoid figures. Those come from resin left on the outside of the seeds during harvest, not from inside them. They are contamination, not content.
How to tell them apart in ten seconds
Four checks, and any one of them is usually enough.
Is there a milligram figure?
CBD oil states a percentage or a milligram total, because that is what you are paying for. Hemp seed oil states neither, because there is nothing to state.
What does the ingredient list say?
Cannabis sativa seed oil is the seed product. Hemp extract, CBD isolate or full-spectrum extract is the other one. The INCI name on cosmetics is explicit about this.
What does it cost per millilitre?
Hemp seed oil is a food oil at food-oil prices. A 250 ml bottle for the price of a large olive oil is not a CBD product, whatever the front of the label suggests.
Is there a certificate?
A CBD product should have a batch certificate with a cannabinoid profile. A seed oil has no reason to have one, and its absence on a product sold as CBD is the answer to the question.
What the label is allowed to say
«Hemp oil» is a real name
It is a legitimate description of a food oil, and using it is not deception in itself. The problem starts when it appears on a product priced and positioned as a cannabinoid extract.
«Hemp extract» is not the same as «hemp seed oil»
One word apart, and the difference is the whole product. Extract means the cannabinoid-bearing parts were processed; seed oil means they were not.
Milligrams that are not CBD
«1000 mg hemp oil» often refers to the total weight of oil in the bottle, not to any cannabinoid content. Only a certificate separates the two figures.
Why sellers phrase it this way
Because cannabinoid-enriched extracts sit in a regulatory category with no authorisation granted, while seed oil is an ordinary food. The vaguer wording buys room that the precise wording would not.
The certificate of analysis
For a CBD product this document is the whole basis of comparison. Without it, every number on the carton is a claim.
The batch number
The number on the certificate has to be the number on your bottle. A brand-level analysis, or one from a previous harvest, describes something else — and this is the check most products fail.
The laboratory name
With a name, and not the seller’s. «Lab tested» without a laboratory commits nobody to anything: every product was tested by somebody at some point.
The cannabinoid profile
Numbers, not ticks. A serious certificate shows at least this:
| Row | Why you look at it |
|---|---|
| CBD | What you are paying for |
| CBDA | Acidic form; total CBD counts it in |
| Δ9-THC | Decides legality and any saliva test |
| CBG, CBN | Profile portrait; high CBN means age, not quality |
The contaminants
Heavy metals, pesticides, residual solvents. Hemp takes up efficiently from the soil whatever is in it — a property used even for land remediation. What is good for the ground is bad news in an extract.
The date
Cannabinoids degrade with light, heat and oxygen. A certificate is a photograph of one batch on one day; older than the product’s shelf life, it does not describe what you received.
Total CBD and the 0.877 factor
The plant makes CBDA, not CBD
Cannabidiolic acid is the acidic form, and it is what is actually present in the living flower. The neutral form appears with heat, during extraction or drying.
The factor
The carboxyl group leaves as carbon dioxide, and it has mass: 1 mg of CBDA yields 0.877 mg of CBD.
The correct sum
Total CBD = CBD + (CBDA × 0.877).
Adding the two rows straight gives a figure higher than the real one. The error always runs the same way, and always in the seller’s favour.
Price per milligram, once you know which product it is
This is the only comparison that works, and it takes one division.
The formula
Volume in ml × percentage × 10 = total CBD in milligrams. Then: price divided by that figure.
Two bottles side by side
| Bottle A | Bottle B | |
|---|---|---|
| Volume | 10 ml | 30 ml |
| Strength | 5 % | 10 % |
| Total CBD | 500 mg | 3000 mg |
| Price | £25 | £75 |
| Price per mg | £0.050 | £0.025 |
The bottle that looks three times dearer costs half. Six times the active substance for three times the price — that is not a trick, it is the division the packaging leaves out.
Why it cannot be done on hemp seed oil
Because there is no percentage to multiply. That is not a flaw in the product: it is the clearest possible sign that you are comparing two different things.
What hemp seed oil is genuinely good for
It deserves saying plainly, because none of the above makes it a bad product.
As a food
It is a nutritional oil with a well-regarded fatty-acid profile, sold in supermarkets and used cold, in dressings and finishing. On those terms it is exactly what it says it is.
As a carrier
Many CBD oils use it as the liquid the extract is dissolved in, alongside MCT and olive oil. In that role it is a sensible choice and affects taste, shelf life and drop size.
Where the problem actually lies
Not in the oil, but in the pricing and positioning. A food oil sold at extract prices is a commercial problem, not a quality one — and the fix is a label that states which of the two it is.
The third product nobody mentions: cannabis oil
Two names cause most of the confusion, but a third one circulates and belongs in the same table.
What people usually mean by it
An oil made from cannabis flower containing THC, often prepared informally. It is a different legal category from either of the other two, and in Great Britain it is not something sold on a shelf.
Why the name spreads
Because «cannabis oil», «hemp oil» and «CBD oil» all sound like descriptions of the same plant, and two of the three are legitimate names for lawful products. The third borrows their respectability.
The three in one table
| Pressed from | Cannabinoids | Where you buy it | |
|---|---|---|---|
| Hemp seed oil | Seed | Effectively none | Supermarket, food aisle |
| CBD oil | Flower and leaf | Stated on the label | Shops, under novel-food rules |
| Cannabis oil (THC) | Flower | THC-dominant | Not a retail product here |
What to do with that
Read which of the three a page is describing before reading anything else on it. A surprising number of articles switch between them mid-paragraph.
Full spectrum, broad spectrum and isolate
These three words apply only to the CBD column above, and they describe what comes alongside the cannabidiol.
Full spectrum
The extract keeps the plant’s other cannabinoids and terpenes, including THC in traces.
Broad spectrum
The same starting point, with an additional step that removes the THC. Whether it actually was removed is shown only by the batch certificate.
Isolate
Cannabidiol alone, usually above 99 %. No terpenes, no other cannabinoids, no THC by construction.
When the difference is practical
If a saliva test is a possibility — driving, for instance — isolate closes the question by design. Broad spectrum works if the certificate confirms the absence of THC with a number, not with the words «THC free» printed on a box.
What the carrier oil changes
It is not a neutral ingredient
CBD is not sold neat. It is dissolved in a carrier, usually MCT (fractionated coconut oil), hemp seed oil or olive oil — which is where the seed oil reappears, in the role it is genuinely good at.
Taste, shelf life and drop size
A thicker oil forms larger drops, so «a drop» is not the same quantity across products. That is a second reason to think in milligrams rather than drops, on top of the pipette itself varying.
Why this matters for comparison
Two bottles with identical percentages can deliver different milligrams per drop. The percentage is about the liquid; the drop is about the bottle.
How much CBD actually reaches the bloodstream
The milligrams on the label and the milligrams in circulation are different numbers, and the gap is larger than most people expect.
Swallowed
Everything swallowed passes through the gut and then the liver before reaching the blood. Published pharmacokinetic studies place oral bioavailability at around 6 %.
Held under the tongue
Absorbed partly through the oral mucosa, bypassing the liver first: studies place it between 13 and 19 %. With one behavioural condition no label states — the liquid has to stay there for a minute or more.
With a fatty meal
CBD is fat-soluble. The product information for the only CBD medicine authorised in the EU describes an increase in exposure of the order of four to five times with a high-fat meal compared with fasting.
What that means for comparing brands
That the route and the meal move the figure more than the choice of brand does. Comparing two products is only honest if the route is the same — capsule milligrams and sublingual milligrams carry the same unit and describe different things.
Storage, and why the bottle is dark
Light, heat and oxygen break cannabinoids down, and THC converts to CBN. Amber or violet glass is a filter, not a design choice.
Cool, dark, tightly closed. A bottle that spent a year above the hob is not the bottle its certificate describes — and nothing on the packaging says so, because the packaging was printed the day the product left the factory.
A high CBN reading does not mean the product is bad. It means it is not fresh.
The UK picture, briefly
CBD as a novel food
In Great Britain, ingestible CBD products come under the novel foods regime and require authorisation. The Food Standards Agency maintains a public list of products linked to applications, which is a control that most European markets do not have.
Hemp seed oil is not in that regime
It is an ordinary food, which is precisely why the two names diverge so sharply in what they are allowed to say.
Where to check the current figures
Our UK legal page carries the details and the date we last verified them. Numbers copied from German or Austrian articles — the 0.3 % limit in particular — do not apply here.
What the EU position adds
Novel food, no authorisation granted
The European Commission classifies cannabinoid-enriched cannabis extracts as a novel food under Regulation (EU) 2015/2283. Applications are under assessment and none has been authorised to date.
What EFSA said in February 2026
The European Food Safety Authority published an updated opinion: the safety of cannabidiol as a novel food could not be established. It derived a reference value of 0.0275 mg per kilogram of body weight per day — roughly 2 mg a day for a 70 kg adult.
That is neither a ban nor a recommendation. It is a benchmark nobody has publicly compared against the contents of the bottles on the shelf.
Why that explains the labels
Because with no authorised health claim, a seller cannot write what the product is for. What is left is the percentage, the adjective and the photograph — and, for the seed oil, not even the percentage.
If you take prescription medicines
The same enzymes
CBD is metabolised in the liver by cytochrome P450 enzymes, chiefly CYP3A4 and CYP2C19. Those same enzymes handle a very wide share of everyday prescriptions.
The mechanism in one sentence
When two substances compete for the same enzyme, one waits. The one that waits accumulates in the blood above the level its dose was calculated for — and it works in both directions.
Who to ask
The pharmacist. Not us, not a forum, not the shop. They have your list and find the interaction in seconds. It is the only question on this page whose answer is not ours to give.
Ten seconds before you buy
- Does the label state a percentage or a milligram total of CBD?
- Does the ingredient list say seed oil, or extract?
- Is there a batch certificate, and does the number match the bottle?
- Does the laboratory have a name that is not the seller’s?
- Can you work out the price per milligram from what is published?
If any answer is no, the other four do not make up for it.
What this page does not tell you
Not what it does
Because there is no authorised health claim for cannabidiol in the European Union under Regulation (EC) No 1924/2006, and none in Great Britain either. Not one.
Not how much to take
That question belongs with a healthcare professional, and the European position is that the safety of regular oral consumption has not been established.
Not which brand is best
We tell you which products the arithmetic can be done on, and which it cannot. The rest is your decision, made with more information than most pages allow.
Frequently asked questions
Is hemp oil the same as CBD oil? No. Hemp seed oil is pressed from the seed and contains almost no cannabinoids. CBD oil is an extract from the flower and leaf, and states a cannabinoid content.
Why do some hemp oils show trace CBD? Because resin from the flowers can remain on the outside of the seeds at harvest. That is contamination carried through pressing, not content from inside the seed.
Which is better? They are different products. As a food oil, hemp seed oil is exactly what it claims. As a source of cannabidiol it is not a candidate, because there is nothing to measure.
How do I check which one I have? Look for a percentage or a milligram figure of CBD, read the ingredient list for «seed oil» versus «extract», and ask for the batch certificate.
What does «1000 mg hemp oil» mean? Often the total weight of oil in the bottle, not a cannabinoid content. Only a certificate separates those two numbers.
Why don’t you say what CBD does? Because there is no authorised health claim for cannabidiol in the EU or in Great Britain, and because EFSA was unable to establish the safety of regular oral consumption.