Black Seed Vitamins: What Nigella Sativa Actually Contains
If you have searched for black seed vitamins, you have probably landed on a page listing an impressive set — vitamins A, C, B1, B2, B6, folate and niacin, alongside iron, zinc and calcium. That list is not invented. Those compounds really are detectable in Nigella sativa seed. What almost nobody publishes is the next number: how much of each actually reaches you in a realistic serving. That number changes the answer completely, and it changes it in a direction most supplement pages would rather not print. This article does the arithmetic, explains what survives the press into the oil and what stays behind in the seed cake, and lands on the honest reason black seed is worth taking — which is not its vitamin content.
For our own oil, see our cold-pressed Ethiopian black seed oil.
The Short Answer
- "Black seed vitamins" is an ambiguous phrase. It covers three different things: the micronutrients naturally present in the seed, black seed sold in the vitamin aisle as a supplement, and black seed oil with vitamins deliberately added to it.
- The vitamins genuinely present in the seed are present in trace amounts. Published seed analyses report roughly 15.4 mg thiamin, 57 mg niacin, 5.0 mg vitamin B6 and 160 µg folic acid per kilogram of seed.
- At a realistic serving those figures are very small. Five grams of whole seed supplies about 7% of the UK and EU Nutrient Reference Value for thiamin, and under 2% for niacin, vitamin B6 and vitamin E.
- There is a legal threshold, and black seed does not meet it. Under Regulation 1169/2011, retained in UK law, a food needs 15% of the Nutrient Reference Value before it may be described as a "source of" a vitamin. Black seed reaches that for none of them.
- The oil carries even less than the seed. Water-soluble vitamins — the B group and vitamin C — do not partition into a pressed oil. They stay behind in the seed cake.
- The reason to take the oil is thymoquinone, which is not a vitamin at all. Sidr & Stone's black seed oil is independently verified at 2.67% thymoquinone per batch by Analytice, an ISO-accredited French laboratory.
"Black Seed Vitamins" Means Three Different Things
Part of the confusion here is linguistic rather than nutritional. The phrase gets used for three separate questions, and they have three separate answers. Sorting them out first saves a lot of wasted reading.
| What people usually mean | What is actually being sold | What to check |
|---|---|---|
| "Which vitamins are in black seed?" | Nothing — this is a nutrition question, not a product | The quantities, not the list of names |
| "Black seed as a vitamin-aisle supplement" | Black seed oil, as liquid or in softgel capsules | Thymoquinone content, and whether it is independently verified |
| "Black seed oil with vitamins in it" | Combination products, typically black seed oil plus added vitamin D | The declared vitamin dose and its % NRV, and the oil's own specification separately |
The third category is worth naming plainly, because it is honest and it proves the point. Combination capsules that pair black seed oil with vitamin D exist precisely because the vitamin has to be added. If the oil already delivered a meaningful dose, there would be nothing to add.
What the Seed Actually Contains, in Numbers
Compositional analyses of Nigella sativa seed consistently report the same small set of B vitamins and a modest tocopherol fraction. The commonly cited figures are around 15.4 mg thiamin, 57 mg niacin, 5.0 mg pyridoxine and 160 µg folic acid per kilogram of seed, with α-tocopherol at roughly 10 mg per kilogram.
Per kilogram is the trap. Nobody eats a kilogram of black seed. Converting those figures to a generous 5 g serving — a heaped teaspoon of whole seed, considerably more than anyone takes as oil — gives the following.
| Nutrient | Reported level in seed | Amount in 5 g | NRV (adult) | % of NRV |
|---|---|---|---|---|
| Thiamin (B1) | 15.4 mg/kg | 0.077 mg | 1.1 mg | ~7% |
| Niacin (B3) | 57 mg/kg | 0.285 mg | 16 mg | ~1.8% |
| Vitamin B6 | 5.0 mg/kg | 0.025 mg | 1.4 mg | ~1.8% |
| Folic acid | 160 µg/kg | 0.8 µg | 200 µg | ~0.4% |
| Vitamin E (α-tocopherol) | ~10 mg/kg | 0.051 mg | 12 mg | ~0.4% |
The legal benchmark makes this concrete. Under Regulation 1169/2011, retained in UK law after EU exit, a food may only be called a "source of" a vitamin when it supplies at least 15% of the Nutrient Reference Value, and "high in" requires 30%. Black seed clears neither bar for any vitamin, even at a serving size larger than anyone realistically takes.
Why the Oil Carries Even Less Than the Seed
Every figure above describes the whole seed. Black seed oil is not the whole seed — it is the lipid fraction pressed out of it, and pressing is a separation, not a concentration of everything at once.
Compounds partition according to what they dissolve in. Fat-soluble compounds travel with the oil. Water-soluble compounds stay with the solid residue, the seed cake, which is pressed out and discarded or sold as animal feed. The B vitamins and vitamin C are water-soluble. They are, for practical purposes, not in the bottle.
| Component | Solubility | In the whole seed | Expected in cold-pressed oil |
|---|---|---|---|
| B vitamins (B1, B3, B6, folate) | Water-soluble | Present in trace amounts | Largely stays with the seed cake |
| Vitamin C | Water-soluble | Trace | Not meaningfully present |
| Vitamin E (tocopherols) | Fat-soluble | Present in trace amounts | Carries across, still trace |
| Carotenoids (provitamin A) | Fat-soluble | Present in trace amounts | Carries across, still trace |
| Thymoquinone | Strongly fat-soluble | In the volatile fraction | Carries across — this is the point of the oil |
| Fatty acids (linoleic, oleic) | — | The seed's oil fraction | Essentially the entire bottle |
So a bottle of black seed oil is not a weak multivitamin. It is a different kind of product entirely.
But Every Other Page Says It Is Packed With Vitamins
This is the fair objection, and it deserves a direct answer rather than a dismissal. Those pages are not lying about the presence of the compounds. Analytical chemistry is sensitive, and a laboratory that looks for thiamin in black seed will find thiamin. The error is in the leap from detectable to nutritionally relevant. Presence is not amount.
There is also a specific factual muddle worth correcting, because it circulates widely. Some sources state that black seed contains keratin which the body converts into vitamin A. Keratin is a structural protein found in hair, skin and nails, and it is not a precursor to vitamin A. The compound that genuinely converts to vitamin A is carotene, a carotenoid pigment — present in the seed, again in trace quantities. The correct chemistry does not change the conclusion, but it is worth getting right.
The second reasonable objection: if the vitamin content is negligible, is the whole category a waste of time? No — but the case for it has to be made on different ground, which is where the next section goes.
So What Is the Oil Actually For?
Black seed oil is not taken for its vitamin content, and it is not a substitute for a multivitamin. It is taken for thymoquinone, the most-researched compound in Nigella sativa, along with the seed's fatty-acid profile. Thymoquinone is not a vitamin, has no Nutrient Reference Value, and is not something a conventional supplement provides.
Thymoquinone is strongly fat-soluble and poorly soluble in water, which is why it travels with the oil rather than the seed cake. Published pharmacokinetic work also describes it as having low oral bioavailability and being rapidly eliminated — which is why a good deal of research effort goes into lipid-based delivery systems. A whole cold-pressed oil delivers thymoquinone already dissolved in its natural fatty-acid matrix. That is a well-grounded argument for whole-oil delivery rather than a proven head-to-head clinical verdict, and it is worth stating in those terms.
Thymoquinone is also heat-sensitive and light-sensitive. That is why cold-pressing below 40°C matters, and why industrial refining — which reaches 200–270°C in its deodorisation stages — is incompatible with preserving it. It is also why dark, UV-protective glass is not a styling decision.
For the fuller treatment, see our guide to thymoquinone in black seed oil, which covers the concentration question in more depth than this article needs to.
How to Read a Black Seed Supplement Label
If the vitamin panel is not the thing that separates one bottle from another, something else has to be. Four checks do most of the work.
- Look for a thymoquinone percentage. Most labels do not carry one. Its absence is informative in itself.
- Ask whether that percentage is verified, and by whom. A brand's own claim and an independent accredited laboratory's measurement are different categories of evidence.
- Check whether testing is per batch or one-off. Seed composition varies by harvest, so a single historic test says less than a per-batch programme.
- Read the ingredient list for what has been added. If a product declares added vitamin D, that is a legitimate formulation choice — but it tells you the vitamin came from a supplier, not from the seed.
If any vitamin is declared with a dose and a % NRV on the label, take that seriously: it has been added deliberately and is measured. What should not persuade you is a marketing paragraph listing vitamin names with no quantities attached. For a fuller walkthrough of the whole decision, see our guide to choosing a quality black seed oil.
Why Sidr & Stone
We have never marketed our oil on its vitamin content, and this article is the reason why. When we commissioned independent testing, the question worth paying to answer was thymoquinone — not a vitamin panel that would have returned trace figures we could not honestly build a claim on. What we publish is the number that actually distinguishes one black seed oil from another.
- Independently verified 2.67% thymoquinone, per batch
- Tested by Analytice, an ISO-accredited French laboratory, with a Certificate of Analysis you can actually see
- Organically grown Ethiopian highland Nigella sativa — chosen after a 36-supplier evaluation
- Cold-pressed below 40°C to protect the heat-sensitive thymoquinone
- 100% pure — a single ingredient, nothing added
- Unrefined, which preserves the oil's natural integrity; it is unfiltered and may show fine natural sediment
- Bottled in matte black UV-protective glass
- Halal certified
- 10% of profits to charity
- Fulfilment in the UK, EU, and US
We will not tell you Sidr & Stone is the strongest or the best — that would be exactly the kind of unquantified claim this article warns against. What we will say is that our thymoquinone figure is 2.67%, independently verified per batch, and the evidence is there to see.
Frequently Asked Questions
What are black seed vitamins good for?
Black seed is not a meaningful source of any vitamin, so it is not useful as a vitamin supplement. Its recognised value lies elsewhere: thymoquinone and the seed's fatty-acid profile. It can be a worthwhile part of a healthy routine, but it does not replace a multivitamin and is not a treatment for anything. For a health concern, consult a qualified medical professional.
Does black seed oil contain vitamin E?
Yes, in trace amounts. Tocopherols are fat-soluble, so they do carry across into the pressed oil, but at roughly 10 mg per kilogram of seed the quantity in a normal serving is a fraction of one per cent of the Nutrient Reference Value.
How can I check whether a black seed supplement really provides vitamins?
Look at the nutrition or supplement panel rather than the marketing copy. Any vitamin present in a meaningful amount must be declared with a quantity and its percentage of the Nutrient Reference Value. A list of vitamin names in a paragraph, with no numbers, is not a declaration.
Are black seed capsules better than the liquid oil for nutrients?
Not materially. A softgel contains the same oil, so the nutrient content is the same for an equivalent quantity. The practical difference is that capsules hide the oil's colour, smell and sediment from you, which removes some of the sensory checks a liquid allows.
Is Sidr & Stone black seed oil fortified with added vitamins?
No. Our oil is a single ingredient — cold-pressed Nigella sativa oil, with nothing added. Products that combine black seed oil with added vitamin D are a different and perfectly legitimate category; they are simply not what we make.
Do I still need a multivitamin if I take black seed oil?
Black seed oil does not displace a multivitamin, because it does not supply meaningful quantities of the vitamins a multivitamin provides. Whether you need a multivitamin at all is a question for your own diet and circumstances, and one worth raising with a qualified medical professional.
Where can I buy black seed oil with a published thymoquinone figure?
Very few retailers publish one, which is why buying direct from a producer that does is usually the shorter route. Sidr & Stone publishes a per-batch figure of 2.67%, verified by Analytice, with fulfilment in the UK, EU, and US.
Is black seed oil a medicine?
No. Black seed oil is a food supplement, not a medicine. It has a long traditional history and an interesting body of research around thymoquinone, and 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 black seed oil marketed with specific disease-cure claims.
Final Thoughts
The vitamin framing around black seed is a case of the right compounds attached to the wrong argument. The seed genuinely contains thiamin, niacin, vitamin B6, folate and tocopherols. It contains them in quantities that do not reach the legal threshold for calling the seed a source of any of them — and the pressed oil carries less still, because most of those compounds are water-soluble and stay with the seed cake.
None of that is a mark against the oil. It is an argument for judging it on the right basis. If you are buying black seed oil, the number that separates one bottle from the next is not a vitamin figure at all; it is thymoquinone, and whether anyone independent has measured it.
That is a checkable question, which is the whole point. A brand either publishes a verified figure or it does not.
Our cold-pressed Ethiopian black seed oil — independently verified at 2.67% thymoquinone — is available now, with fulfilment in the UK, EU, and US.
Shop Sidr & Stone Cold-Pressed Ethiopian Black Seed Oil — Verified 2.67% Thymoquinone →
Disclaimer: This article describes the published composition of Nigella sativa seed and oil, and the nutrition labelling rules applying in the UK and EU, at the time of writing; analytical figures vary between samples and regulations may change, so readers should check current sources. Black seed oil is a food supplement, not a medicine, and is not a substitute for medical treatment of any condition. For any health concern, consult a qualified medical professional.