Olive Pomace and Its Many Afterlives
Every litre of oil leaves behind a wet brown mass of skins, pulp and crushed stones called pomace. Far from waste, it feeds a whole secondary industry — including a cheap oil sold in supermarkets that many buyers mistake for the real thing. Knowing what pomace becomes protects you at the shelf.
Pomace is what is left when the good oil has been spun away: a damp, brown cake of crushed fruit and shattered stone. It is not glamorous, but very little of the olive is truly wasted, and pomace is proof. It becomes a cheap cooking oil, a biofuel, a soil feed, even a raw material for cosmetics. The one you need to recognise is the oil, because it shares a shelf — and sometimes a look — with the real thing while being something quite different.
What pomace is — and the oil made from it
Pomace is the solid residue left in the decanter after the good oil has been spun off: skins, flesh and shattered stone, still holding a little oil locked in the fibre. That residual oil cannot be won by simple pressing, so it is extracted industrially with solvents and heat, then refined heavily and usually blended with a little virgin oil for flavour and colour. The result is sold as ‘olive pomace oil’. It is legal, it is fine for high-heat frying, and it is emphatically not extra virgin — despite often sitting on the same shelf at a tempting price.
The other afterlives
Beyond oil, pomace has a long second life. Dried and pressed into briquettes it burns as a biofuel that heats mills and homes across the olive belt. Spread on land or composted it returns nutrients to the grove. Some feeds livestock; some yields extracts and compounds for cosmetics and supplements; researchers keep finding new uses for its polyphenols and fibre. A well-run mill treats pomace as a product line, not a disposal problem — which is part of why olive oil, properly made, is a remarkably low-waste business.
The shelf trap to know
Here is the part worth memorising. ‘Olive pomace oil’ and ‘olive oil’ can look almost identical on the label, and the price gap tempts a tired shopper. But pomace oil is solvent-extracted and refined — a functional frying oil with little of the flavour, aroma or polyphenols that make extra virgin worth buying. It is not a scandal and not unsafe; it is simply the lowest grade in the family, dressed to sit beside its betters. Read the grade word, not just the word ‘olive’.
| Extra virgin | Refined / ‘olive oil’ | Pomace oil | |
|---|---|---|---|
| Source | First pressing of the fruit | Refined virgin oil, blended | Residue, solvent-extracted |
| Made by | Mechanical only | Refining + a little virgin | Solvent + heat + refining |
| Flavour / polyphenols | High | Low | Very low |
| Typical use | Finishing, dressing | Cooking | High-heat frying |
| Price | Highest | Middle | Lowest |
| What pomace is | Skins, pulp and crushed stone after pressing |
|---|---|
| Oil extraction | Solvents and heat, then heavy refining |
| Sold as | ‘Olive pomace oil’ — lowest olive grade |
| Good for | High-heat frying |
| Not | Extra virgin; low in flavour and polyphenols |
| Biofuel | Dried briquettes heat mills and homes |
| Other uses | Compost, animal feed, cosmetics, extracts |
Reading the shelf
- Read the grade word: ‘pomace’ is the cheapest, not a bargain extra virgin.
- Buy pomace oil on purpose for high-heat frying, never for flavour.
- For taste and polyphenols, pay for extra virgin and use it raw.
- Do not be fooled by a near-identical label and a tempting price.
Olive pomace: common questions
What is olive pomace?
The solid residue left after the oil is pressed out — skins, pulp and crushed stone, still holding a little oil locked in the fibre.
What is olive pomace oil?
Oil extracted from that residue with solvents and heat, then heavily refined and usually blended with a little virgin oil. It is the lowest grade in the olive-oil family.
Is pomace oil safe to use?
Yes — it is legal and fine for high-heat frying. It simply lacks the flavour, aroma and polyphenols of extra virgin, so it is a cooking oil, not a finishing one.
Why is pomace oil so cheap?
Because it is made from what is left over, using an industrial solvent process. That low cost is exactly why it can sit near real olive oil and tempt an unwary shopper.
What else is pomace used for?
Dried briquettes for biofuel, compost and soil feed, animal feed, and raw material for cosmetics and extracts — a genuinely multi-use by-product.
The word to watch on the shelf is ‘pomace’. Olive pomace oil is the bottom grade — the last oil squeezed from the spent cake with solvents and heat, then refined until it barely tastes of olive. It is legal and fine for frying, but it is not extra virgin, whatever the near-identical label and friendly price suggest. Buy it on purpose for a hot pan; never mistake it for the good oil. The rest of the pomace, meanwhile, quietly becomes fuel, compost and feed — the olive wasting almost nothing.
Drawn from standard descriptions of olive-pomace-oil extraction and olive-oil grade definitions.