The quick answer: there is no universal “good TQ” cutoff.
There is no single thymoquinone percentage in the scientific literature that works as a universal quality grade for every black seed oil. TQ varies between oils, and the number only becomes useful when you know what was tested, how it was tested and what kind of product you are comparing.
For shoppers, the better question is not simply “what is the highest TQ?” It is: is this TQ number actually verified?
Terms such as “high TQ” or “high potency” are less informative when a brand does not show the laboratory, method or report behind the claim.
What does a TQ percentage mean?
Thymoquinone — usually shortened to TQ — is one naturally occurring constituent associated with Nigella sativa. A laboratory can analyze an oil sample and report the amount of TQ detected using a defined analytical method.
That percentage describes the sample analyzed under that test. It should not automatically be interpreted as a permanent specification for every future harvest or bottle unless the manufacturer has a separate standardization and batch-verification program that supports that claim.
If you want the fundamentals first, read our guide to what thymoquinone is.
Why can TQ results vary between black seed oils?
Scientific research shows that Nigella sativa oils are not chemically identical. Seed origin and composition can vary, and extraction methods can produce oils with different measured TQ levels. Storage and handling conditions can also affect the broader quality of an oil.
This is one reason a percentage should be read in context rather than used as a stand-alone score. Two products with different TQ figures may also differ in extraction method, product format, freshness, purity or the way the result was measured.
How to compare high-TQ black seed oil claims.
When two products advertise thymoquinone, compare the evidence behind the numbers before comparing the numbers themselves.
- Look for an exact measured result. “Contains TQ” is different from publishing a percentage.
- Identify the laboratory. Independent testing is more transparent when the lab is named.
- Look for the analytical method. A percentage is more meaningful when the method used to obtain it is disclosed.
- Look for report or sample details. A date, report number or Certificate of Analysis helps make a result traceable.
- Compare the same kind of product. Whole cold-pressed oil, standardized extracts, capsules and fortified formulas are not automatically equivalent products.
- Do not ignore the rest of the quality picture.Botanical identity, extraction, freshness, handling, storage and ingredient simplicity still matter.
Our broader black seed oil quality checklist explains how to evaluate those factors together.
What does Hadith Organics’ 2.35% TQ result tell us?
A Hadith Organics black seed oil sample was analyzed by Eurofins. The report lists 2.35% thymoquinone measured by UPLC. The final report is dated May 28, 2025 and identifies report 4940074-0.
We publish that information because it is specific and traceable. We do not present 2.35% as a universal threshold that every black seed oil must exceed. It is a documented result for the tested sample and one part of the product’s quality story.
You can view the testing page and the full Certificate of Analysis rather than relying on the number alone.
Does higher TQ automatically mean better black seed oil?
No. TQ is useful because it is measurable, but black seed oil is not a single-compound product. A higher headline percentage does not tell you whether the botanical identity is correct, whether the oil is fresh, how it was processed, how it has been stored or whether the claim is independently supported.
A strong comparison therefore asks two questions at the same time: what does the lab result show, and how transparent is the rest of the product?
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