Carvacrol in oil of oregano: input oil vs finished blend
The most frequently misread number in oregano sourcing. A carvacrol figure on a COA usually describes the concentrated essential oil as received — not the diluted product that ends up in the bottle.
The short answer
Oregano essential oil and oil of oregano are two different things, and they carry two different carvacrol figures. Oregano essential oil is the concentrated steam-distilled extract; its carvacrol content is reported on the distiller’s lot COA and commonly sits at 70% or above. Oil of oregano is that essential oil diluted into a food-grade carrier so it can actually be bottled and used. Because the essential oil is now a fraction of the liquid, the finished blend cannot carry the same percentage. Quoting the input figure as if it described the finished bottle overstates the product.
Rule of thumb: a carvacrol percentage is only meaningful when you know which of the two materials it describes — the ingredient as received, or the batch as filled.
Why the number cannot carry over
Dilution is arithmetic, not marketing. If a concentrated oregano essential oil tests at 70%+ carvacrol on its lot COA and that oil makes up a defined share of a finished blend, the carvacrol share of the finished blend is proportionally lower. The exact finished figure depends entirely on the ratio that was actually used, which is why it belongs on the batch record for that specific fill rather than on a generic product claim.
This is also why two suppliers can both truthfully quote a 70%+ carvacrol input figure and still ship materially different products: one may be describing the essential oil as received, the other a finished blend that was independently tested. Without knowing which material the number describes, it is not comparable.
The two documents
What to ask before you buy
- Which document does the quoted carvacrol figure come from — the input lot COA or a finished-blend analysis?
- Is the botanical species stated on that lot COA, or only asserted in the product copy?
- What dilution ratio will my batch be prepared at, and is it recorded?
- Which carrier is used, and does the carrier have its own documentation?
- Does the blend record for my specific fill travel with the shipment?
- Who performed the distillation, and is the supplier claiming to have done it themselves?
How this works here
BlackSeedSource does not distil oregano essential oil. It is sourced steam-distilled from qualified Turkish distillers and verified by COA before use; blending, filling and labelling are carried out at the company’s own facility in Hatay, where its black seed oil is cold-pressed. Incoming lots are reviewed at intake against a 70%+ carvacrol input specification with the botanical species stated on the lot COA.
The finished blend is prepared to the ratio a buyer specifies and recorded per batch, so the figure that describes your product is the one on your blend record — not the input figure.
Related pages
FAQ
Does a 70%+ carvacrol COA mean the bottle I receive is 70%+ carvacrol?
No. A 70%+ carvacrol figure normally describes the concentrated oregano essential oil as it arrived from the distiller. Oil of oregano is that essential oil diluted into a carrier, so the finished blend contains a proportionally smaller share of carvacrol. The two numbers are reported on two different documents and should never be treated as interchangeable.
Which documents cover a blended oil of oregano?
Two. The supplier COA for the incoming oregano essential oil lot covers the ingredient as received, including botanical species and its carvacrol figure. The blend record for the batch that was actually filled covers the dilution ratio and the carrier used. Reading only the first document overstates what is in the finished bottle.
Why is the finished blend carvacrol percentage not printed as a fixed number?
Because the dilution ratio is a buyer specification, not a fixed recipe. A blend prepared at one ratio and a blend prepared at another are different products with different finished figures, so the number belongs on the batch record for that specific fill rather than on a general product page.
What should a buyer ask an oregano oil supplier for?
Ask which document the quoted carvacrol figure comes from, whether the botanical species is stated on that lot COA, what the dilution ratio of the finished blend is, which carrier is used, and whether the blend record for your specific batch travels with the shipment.
Does BlackSeedSource distil its own oregano essential oil?
No. The oregano essential oil is sourced steam-distilled from qualified Turkish distillers and verified by COA before use. Blending with the carrier, filling and labelling are carried out at the company's own facility in Hatay, where its black seed oil is cold-pressed.