Olive Oil vs Vegetable Oil: What Is Actually in Each Bottle
Olive oil vs vegetable oil is usually a question asked mid-recipe: the instructions say "vegetable oil", the cupboard holds olive oil, and you want to know whether the swap works and whether one is actually better for you. The honest starting point is that "vegetable oil" is not one thing. In a US supermarket the bottle is usually soybean oil; in a UK supermarket it is usually rapeseed oil. Both are normally refined. Extra virgin olive oil is pressed from fruit and bottled without refining. Those two facts explain almost every difference in flavour, cooking behaviour and nutrition — and they also explain where vegetable oil is the perfectly sensible choice. Here is what is actually in each bottle, what the evidence says, and when to reach for which.
For our own oil, see our cold-pressed organic Marrakech olive oil.
The Short Answer
- "Vegetable oil" is a label, not a plant. Crisco Pure Vegetable Oil in the US lists one ingredient, soybean oil; Tesco Pure Vegetable Oil in the UK lists one ingredient, rapeseed oil.
- Supermarket vegetable oil is normally refined — a process that includes deodorisation under vacuum at roughly 200–260°C, which strips flavour and removes some of the oil's natural tocopherols and sterols.
- Extra virgin olive oil is made by mechanical pressing only, with no refining, so its polyphenols, aroma and flavour survive into the bottle.
- A bottle labelled simply "olive oil" is different again: under USDA grade standards it is a blend of refined olive oil and virgin olive oils.
- In a 28-year Harvard study of 92,383 US adults, higher olive oil intake was linked to lower mortality, but swapping olive oil for other vegetable oils showed no significant association — an honest limit worth knowing.
- In most recipes you can swap olive oil for vegetable oil one-for-one; the real difference in a cake or a stir-fry is flavour.
Olive Oil vs Vegetable Oil: The Direct Answer
Olive oil is pressed from the flesh of the olive; vegetable oil is usually a refined seed oil — soybean in the US, rapeseed in the UK. Extra virgin olive oil keeps its polyphenols and flavour because it is never refined. Vegetable oil is cheaper and neutral. Both can be used for everyday cooking; they differ most in taste and processing.
The more useful version starts with the label. If the classification question — fruit oil versus seed oil — is what brought you here, our explainer is olive oil a seed oil? covers it in full.
What Is Actually in a Bottle of "Vegetable Oil"
The contents depend on where you shop. Crisco, one of the best-known US brands, lists the ingredient in its Pure Vegetable Oil as a single item: soybean oil. In the UK, Tesco Pure Vegetable Oil lists a single ingredient too: rapeseed oil. The British Heart Foundation's dietitian Tracy Parker makes the same point in her guide to rapeseed oil: look on the label of regular "vegetable oil" and you will often find it is 100% rapeseed.
Labelling rules leave room for variation. US federal rules (21 CFR 101.4) let a food list fats and oils with "and/or" wording when the oil used can change between batches. UK and EU labelling law (Regulation 1169/2011, Annex VII) lets refined oils be grouped as "vegetable oils" in an ingredients list, but only if the specific plant origins follow immediately.
What is in each bottle, at a glance
| What the label says | What is usually inside | How it is made | What it tastes like |
|---|---|---|---|
| "Vegetable oil" (US) | Soybean oil, sometimes blended with others | Extracted from the bean, then refined | Neutral |
| "Vegetable oil" (UK) | Rapeseed oil, often 100% | Pressed and/or solvent-extracted, then refined | Neutral |
| "Olive oil" or "pure" / "light" | A blend of refined olive oil and virgin olive oils | Mostly refined, with some virgin oil added back | Mild |
| "Extra virgin olive oil" | Olive oil only, the top grade | Mechanical pressing only, no refining | Fruity, grassy, sometimes peppery |
The third row is the one that catches people out. The USDA's grade standards define "olive oil" as a blend of refined olive oil and virgin olive oils — so a bottle that says only "olive oil" has itself been largely refined. If you are comparing olive oil with vegetable oil because you want something less processed, the words "extra virgin" are the ones that matter.
Pressed vs Refined: Why the Process Changes the Oil
Most of the practical difference between the two bottles comes from what happens after the oil leaves the plant.
Refined vegetable oil goes through a sequence of industrial steps — typically degumming, neutralising, bleaching and deodorising. Deodorisation is normally carried out under vacuum at around 200–260°C for one to three hours, which removes free fatty acids and odour compounds. It also strips out, at least partly, some of the oil's own tocopherols (vitamin E compounds) and plant sterols. The result is exactly what the process is designed to produce: a clear, pale, neutral, shelf-stable oil that tastes of very little.
Extra virgin olive oil is made the other way round. Olives are crushed, the paste is mixed, and the oil is separated mechanically — no solvents, no bleaching, no deodorising. Because nothing is removed, the oil keeps its colour, its aroma and its phenolic compounds, including hydroxytyrosol and oleocanthal. Our guide to olive oil polyphenols explains what those compounds are and why freshness matters to them.
Neither route is a scandal. Refining makes a cheap, neutral oil possible; pressing makes a characterful one.
Is Olive Oil Healthier Than Vegetable Oil?
This is where most comparison articles overreach, so it is worth being precise about what the evidence does and does not show.
The strongest long-term data come from Harvard. In a 2022 study in the Journal of the American College of Cardiology, Guasch-Ferré and colleagues followed 60,582 women and 31,801 men in two US health-professional cohorts for 28 years. People who ate more than half a tablespoon (7 g) of olive oil a day had a 19% lower risk of death from any cause than those who rarely or never ate it (hazard ratio 0.81). Replacing 10 g a day of margarine, butter, mayonnaise or dairy fat with olive oil was associated with an 8–34% lower risk of total and cause-specific mortality.
But the same study found no significant association when olive oil was substituted for other vegetable oils. That is an observational result — it shows association, not cause, and the cohorts were mostly white health professionals — but it is an important, honest limit. On the numbers, the big gain comes from choosing plant oils over solid animal and processed fats, not from olive oil beating every other plant oil.
Where olive oil does stand apart is in what refining removes. Extra virgin olive oil carries polyphenols that refined vegetable oils do not, and the case for a diet built around it is strong — see our article on olive oil and heart health for the trial evidence.
Where vegetable oil genuinely wins
In fairness, UK vegetable oil has two real points in its favour. The British Heart Foundation notes that rapeseed oil has half the saturated fat of olive oil and the best balance of omega-3 and omega-6 fats of all plant oils. It is also cheaper and flavour-neutral. Anyone telling you vegetable oil is poison is not reading the evidence; anyone telling you the two are identical is ignoring what refining takes out.
Cooking With Each: Swaps, Heat and Flavour
For the cook, the practical questions are simpler than the nutritional ones.
- Swapping in recipes. The North American Olive Oil Association advises that olive oil can replace vegetable oil in any recipe at a 1:1 ratio. The main change is flavour.
- Baking. In cakes, brownies and muffins, a mild olive oil works invisibly and a robust extra virgin adds a fruity note. Our guide to olive oil for baking covers the butter swap and which bakes suit it best.
- Everyday frying and roasting. The old warning that you cannot cook with olive oil does not survive the heating research. Our article on olive oil at high heat explains what actually happens in the pan.
- Deep-frying in bulk. Vegetable oil is usually the practical choice — not because olive oil fails, but because a fryer full of extra virgin is expensive and its flavour is largely wasted.
Which to use, and when
| Kitchen job | Better pick | Why |
|---|---|---|
| Salad dressing, dipping, drizzling | Extra virgin olive oil | Flavour and unrefined character are the point |
| Sautéing, roasting, shallow frying | Either | Both cope with everyday home heat; choose by taste |
| Neutral-tasting cakes and muffins | Vegetable oil or a mild olive oil | No flavour of its own to compete with the bake |
| Olive oil cake, focaccia, savoury bakes | Extra virgin olive oil | The fruity flavour is part of the recipe |
| Large-batch deep-frying | Vegetable oil | Cost and neutrality at volume |
How to Read the Label Before You Buy
If you have decided olive oil is worth the extra, three checks make sure the bottle is what you think it is. Look for the words "extra virgin" — "olive oil", "pure" and "light" describe mostly refined blends. Read the ingredients: olive oil and nothing else, with no rapeseed or sunflower blended in. And prefer dark glass or a tin with a harvest or best-before date. For a fuller walkthrough, see our guide to choosing a quality olive oil.
Why Sidr & Stone
This article's argument is that the process decides what ends up in the bottle. Sidr & Stone's olive oil is an extra virgin, cold-pressed, unfiltered oil from olives grown on our own single-estate farm on the plains outside Marrakech, Morocco — pressed, not refined, with nothing added.
- Single-estate — our own family-owned farm near Marrakech, Morocco; we control every step from tree to bottle, with no blending across origins.
- Rain-fed — no irrigation; the trees take what the season gives.
- Organically grown — no synthetic fertilisers, pesticides or herbicides (not yet certified; certification is in progress).
- Single harvest — a small, limited batch, picked when the fruit is ready; the current batch's harvest details are on the product page.
- Cold-pressed within hours of harvest — mechanical extraction only, with no solvents, no refining and no deodorising.
- Unfiltered extra virgin — minimally processed; it may show natural sediment, which is normal.
- 100% natural — a single ingredient, olive oil, with nothing blended in.
- Dark glass with a gold label — protective packaging against light.
- 10% of profits to charity — a brand-wide commitment.
- Fulfilment in the UK, EU, and US.
We will not tell you Sidr & Stone is the best olive oil — that would be the very kind of claim this article asks you to look past. What we will say is that our oil is single-estate Moroccan, rain-fed, organically grown and cold-pressed within hours of harvest, and that the difference from a refined oil is there in the colour, the aroma and the taste.
Frequently Asked Questions
Is olive oil better than vegetable oil?
For flavour and unrefined character, extra virgin olive oil is the stronger choice. On long-term health outcomes, a large Harvard study found no significant difference when olive oil replaced other vegetable oils — the clearer gains came from replacing butter, margarine and other animal or processed fats.
What is vegetable oil actually made from?
Usually a single seed oil. In the US it is typically soybean oil; in the UK it is typically rapeseed oil. Check the ingredients on the bottle — it will name the plant.
Can I use olive oil instead of vegetable oil in baking?
Yes, at a 1:1 swap. Use a mild olive oil if you want the bake to taste neutral, or extra virgin if you want its fruity flavour to come through.
Is vegetable oil the same as rapeseed or canola oil?
In the UK, a bottle of "vegetable oil" is very often 100% rapeseed oil. Canola is a variety of rapeseed bred for low erucic acid, so the two are closely related, but a US "vegetable oil" is more often soybean.
How is Sidr & Stone's olive oil different from supermarket vegetable oil?
Ours is a single-ingredient extra virgin olive oil, cold-pressed on our own farm outside Marrakech with no refining. Supermarket vegetable oil is usually a refined seed oil made to be neutral and inexpensive.
Can you mix olive oil and vegetable oil?
Yes. Some cooks blend them to soften olive oil's flavour or stretch it further. Just be aware that shop-bought "blends" can contain very little olive oil — read the ingredients.
Where can I buy an extra virgin olive oil that is not refined or blended?
Look for a producer that names a single origin and sells only extra virgin. Our single-estate Marrakech olive oil is available to pre-order from the current single-harvest batch, with fulfilment in the UK, EU, and US.
Is olive oil a medicine?
No. Olive oil is a food, not a medicine. It has a long traditional history — including being honoured in the Prophetic Sunnah — and a substantial body of modern research, particularly around polyphenols, cardiovascular health, and the Mediterranean diet pattern. It can be a worthwhile part of a healthy routine, but it does not cure diseases and is not a substitute for medical care. Be cautious of any olive oil marketed with specific disease-cure claims.
Final Thoughts
The olive oil vs vegetable oil question is really a question about what happens between the plant and the bottle. Vegetable oil is usually a refined seed oil — soybean or rapeseed — engineered to be neutral, stable and inexpensive, and it does that job well. Extra virgin olive oil is pressed and bottled without refining, which is why it tastes of something and carries compounds that refining removes.
The evidence does not support calling vegetable oil harmful, or olive oil a miracle. It supports choosing plant oils over solid animal fats — and choosing extra virgin when you want flavour and unrefined character.
Our cold-pressed organic Marrakech olive oil — single-estate, rain-fed and unfiltered — is available to pre-order now from our limited single-harvest batch, with estimated shipping from November 2026 and fulfilment in the UK, EU, and US.
Our extra virgin olive oil is grown organically on our own single-estate farm on the plains outside Marrakech: we control every step from tree to bottle, and no synthetic pesticides, herbicides or fertilisers are used. It is not yet certified organic — certification is in progress, and we will publish it as soon as it comes through.
Pre-Order Sidr & Stone Organic Marrakech Olive Oil — Limited Single-Harvest Batch →
Disclaimer: This article explains what olive oil and vegetable oil typically contain and summarises published research and labelling rules at the time of writing; product formulations, standards and research findings may change, and readers should check current sources. References to Crisco and Tesco describe their published product information and are not affiliated with or endorsed by either brand. Olive oil is a food, not a medicine, and is not a substitute for medical treatment of any condition. For any health concern, consult a qualified medical professional.