Thymoquinone in Black Seed Oil: What the TQ Percentage Means

Thymoquinone (TQ) is the compound in black seed oil that researchers measure most, and the number brands use to talk about strength. It varies enormously: a 2022 study of commercial products found 3 to 809 mg per 100 g. To compare products, multiply the milligrams of oil per serving by the TQ percentage on that lot's lab report.

What is thymoquinone?

Thymoquinone is a naturally occurring compound in the volatile, aromatic part of Nigella sativa seed oil. It's a big part of why the oil smells and tastes so sharp, and it's the marker most black seed research, and most brand marketing, focuses on. A TQ number tells you how much of that compound is in the bottle. It doesn't tell you what the oil will do for you.

Why does TQ vary so much between bottles?

A 2022 screening study in Nutrients measured TQ in commercial black seed products and found anywhere from 3.08 to 809.4 mg per 100 g. The reasons are well understood:

• The seed. Origin, variety and harvest timing all change TQ levels.
• Extraction. The same study notes that supercritical CO2 extraction can yield more TQ than cold pressing, so "cold-pressed" describes a method, not a potency.
• Light and heat. In forced-degradation testing, TQ held up against acids, bases and oxidizers, but light and heat broke it down significantly (Acta Pharmaceutica, 2020).
• Age and storage. Air, heat and light during storage reduce the volatile compounds over time.
• Adulteration. Oil cut with cheaper oils has less TQ by definition (American Botanical Council adulterants program).

How do I calculate the thymoquinone in a serving?

Milligrams of black seed oil per serving × TQ percentage = milligrams of TQ per serving. Use the black seed oil line on the Supplement Facts panel, not the front of the bottle, and the TQ percentage from the Certificate of Analysis for your lot.

Black seed oil per serving	TQ % on the COA	TQ per serving
500 mg (1 softgel)	1%	5 mg
1,000 mg (2 softgels)	0.5%	5 mg
1,000 mg (2 softgels)	1%	10 mg
1,000 mg (2 softgels)	2%	20 mg
1 teaspoon liquid (about 4,500 mg)	1%	about 45 mg

Last checked: October 2026. Example values to show the math, not any specific product. Teaspoon weight assumes roughly 0.9 g of oil per ml.

The table makes one thing obvious: a bigger milligram number on the front of the bottle doesn't mean more TQ. A 1,000 mg serving at 0.5% gives you the same TQ as a 500 mg softgel at 1%.

What does "3X TQ" or "high TQ" actually mean?

Without a base number and a lab report, nothing you can check. "3X" compared with what? Measured how, by which lab, on which lot? Some brands publish a minimum TQ percentage; better ones publish the measured result for each batch. If a brand won't show you a COA for the lot you're buying, read the multiplier as advertising.

Is a higher TQ percentage always better?

A higher number means more of that compound per serving, and that's all it means. It isn't a promise of any result, and a stronger oil is not a reason to take more than the label says. If you take prescription medication, read our guide to black seed oil side effects before you start.

Where is the TQ number for SMAMES?

For SMAMES, every lot is third-party tested; thymoquinone content is reported on that lot's Certificate of Analysis. Each serving is 600mg of cold-pressed black seed oil plus 400mg of cold-pressed pomegranate seed oil, with no carrier oil, so the math above works directly from the label.

Quick answers

How much thymoquinone is in black seed oil?

It depends on the oil. One 2022 study found commercial products ranging from about 3 mg to 809 mg per 100 g. Only a lab report tells you what's in your bottle.

Does cold-pressed black seed oil have more thymoquinone?

Not necessarily. Cold pressing avoids solvents and added heat, but CO2 extraction can yield more TQ. Check the measured number.

Do capsules have less thymoquinone than liquid?

Not as a rule. In the 2022 study, bottled oils ranged from 45 to 809 mg per 100 g and capsules from 21 to 660 mg per 100 g. The ranges overlap a lot.

Does thymoquinone break down?

Yes, with light and heat. Store black seed oil somewhere cool and dark, and don't cook with it.

Use this with our 8 checks for choosing a black seed oil and how to read a COA. Our products are in the black seed oil collection.