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Black Cumin Seed

Best studied for: Allergies and hay fever; Blood sugar balance; Immune support. Best known for supporting immune health, easing allergy symptoms.

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What is black cumin seed? Black cumin seed, also known as Nigella sativa, is a plant native to southwest Asia and the Middle East. It has been used for medicinal purposes for centuries and is known for its potent antioxidant, anti-inflammatory, and immunomodulatory properties. How does it work? Black cumin seed contains thymoquinone, which is its primary active ingredient. Thymoquinone has been shown to have anti-inflammatory, antioxidant, and anti-cancer properties. It works by reducing oxidative stress and inflammation, which play a role in many chronic diseases. What are the active ingredients that are important for its medicinal properties? The primary active ingredient in black cumin seed is thymoquinone, but it also contains other important compounds such as carvacrol, t-anethole, and 4-terpineol. What forms does it come in? Black cumin seed is available in various forms, including whole seeds, ground seeds, and oil. When was it first used for medicinal purposes? Black cumin seed has been used for medicinal purposes for centuries, dating back to ancient Egypt and Persia.

Helps

What does Black Cumin Seed help with? Black cumin seed comes from a small flowering plant. It grows in Southwest Asia. People have used the seeds as medicine for more than 2,000 years , in Persian, Islamic, Egyptian and Ayurvedic practice. High blood sugar and type 2 diabetes Good evidence — more than one human trial of black seed supplements; sizes and doses are not on file. In these trials, people taking black seed had lower fasting blood sugar. Their bodies also seemed to use insulin better. Our file does not list the trial sizes or the doses used. Evidence grade B · Traditional tier T3 High cholesterol Good evidence — human supplement trials with steady results across studies. Across trials, people taking black seed had lower LDL, the "bad" cholesterol. Their triglycerides fell too. HDL, the "good" kind, rose only a little. Evidence grade B · Traditional tier T3 High blood pressure Good evidence — several clinical trials of black seed oil. In several trials, both the top and bottom numbers went down. The drops were small but real. In these studies, the oil seemed to relax blood vessels and act as a mild water pill. Evidence grade B · Traditional tier T3 Asthma and wheezing Good evidence — clinical trials in people who already had asthma. Trials tested black seed oil in people with asthma. Those taking it wheezed less and scored better on lung tests. They also reported fewer attacks. Evidence grade B · Traditional tier T3 Extra weight and waist size Good evidence — several trials in people who were overweight. In these trials, people lost a small amount of weight. Waist size and BMI dipped as well. The changes were bigger when people also changed what they ate. Evidence grade B · Traditional tier T3 Joint pain and morning stiffness Early evidence — clinical trials in rheumatoid arthritis, based on what people reported. People with rheumatoid arthritis used black seed oil in these trials. They reported less joint swelling and less stiffness in the morning. Some studies compared thymoquinone, a compound in the seed, with common anti-swelling drugs. Evidence grade C · Traditional tier T3 Hay fever and other allergies Early evidence — early human studies of the oil, plus lab work on the plant compounds. Early studies found less sneezing, runny nose and itchy eyes. In lab work, a compound called nigellone acted like a mild antihistamine. Lab work also showed thymoquinone calming an immune overreaction. Evidence grade C · Traditional tier T3 Eczema and psoriasis patches Early evidence — small studies of the oil put on the skin. People in these studies rubbed black seed oil on the skin. Redness, itching and scaling went down. In lab work, the oil calmed swelling and slowed some germs. Evidence grade C · Traditional tier T3 Bloating, gas and stomach cramps Early evidence — small clinical studies, plus long traditional use. Small studies looked at everyday gut complaints. People reported less bloating, gas and cramping. In lab work, the seed relaxed gut muscle and slowed some gut bacteria. Evidence grade C · Traditional tier T3 What Black Cumin Seed has not been shown to do It has not been shown in people to prevent colds or flu; that use rests on tradition and lab work only. It has not been shown to replace blood pressure medicine, since the drops seen in trials were modest. It has not been shown to replace diabetes medicine or insulin. It has not been shown to give fast relief during an asthma attack; the trials tested steady use over time. It has not been shown to clear eczema or psoriasis; studies only tracked redness, itching and scaling. It has not been shown to cause large weight loss on its own; the best results came with diet changes. How to read this: The grades here are about proof, not strength. A means many good human trials agree. B means at least one good human trial. C means small or mixed human studies. D means the human evidence is weak or clashes. "Insufficient" means no human study a

Black Cumin Seed

Quick Facts

  • What it is: A small flowering plant native to Southwest Asia whose seeds have been used medicinally for over 2,000 years across Middle Eastern, Islamic, and South Asian traditions.
  • Main uses: Best known for supporting immune health, easing allergy symptoms, lowering blood sugar, and reducing inflammation throughout the body.
  • Best for: Allergies and hay fever, Blood sugar balance, Immune support
  • Active ingredients: Thymoquinone (TQ), Thymohydroquinone, Thymol, Carvacrol, Nigellone, Alpha-hederin, Fixed oils (linoleic, oleic acids), Saponins, Alkaloids (nigellicine, nigellidine)
  • Forms: Cold-pressed oil (liquid), Softgel capsules, Hard capsules (ground seed powder), Raw seeds (culinary), Topical oil
  • Time to effect: 4–8 weeks for most immune and metabolic benefits; allergy relief may begin within 2–4 weeks.
  • Side effects: Generally well-tolerated at typical doses; high amounts may cause mild stomach upset or lower blood pressure too much in sensitive individuals.
  • Pregnancy & breastfeeding: Avoid in pregnancy and while breastfeeding.

Educational information, not medical advice — ask your doctor or midwife.

What is black cumin seed?

Black cumin seed, also known as Nigella sativa, is a plant native to southwest Asia and the Middle East. It has been used for medicinal purposes for centuries and is known for its potent antioxidant, anti-inflammatory, and immunomodulatory properties.

How does it work?

Black cumin seed contains thymoquinone, which is its primary active ingredient. Thymoquinone has been shown to have anti-inflammatory, antioxidant, and anti-cancer properties. It works by reducing oxidative stress and inflammation, which play a role in many chronic diseases.

What are the active ingredients that are important for its medicinal properties?

The primary active ingredient in black cumin seed is thymoquinone, but it also contains other important compounds such as carvacrol, t-anethole, and 4-terpineol.

What forms does it come in?

Black cumin seed is available in various forms, including whole seeds, ground seeds, and oil.

When was it first used for medicinal purposes?

Black cumin seed has been used for medicinal purposes for centuries, dating back to ancient Egypt and Persia.

If this is an emergency

Some reactions to Black Cumin Seed need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.

Who should avoid Black Cumin Seed?

  • Do not take medicinal doses of black cumin seed while you are pregnant; food amounts in cooking are fine.
  • Do not take it with diabetes drugs such as insulin or metformin unless your doctor says it is safe.
  • Do not take high doses if you take blood pressure pills or already run low.
  • Do not take it if you react to plants in the buttercup (Ranunculaceae) family, such as black cohosh.
  • Never rub the oil on a large patch of skin before you test a small spot for a day.
  • Do not go above 3 mL of oil or 3 g of seed powder a day to speed up results.
  • Avoid taking it on an empty stomach, since it can upset your belly.
  • Stop taking it at least two weeks before any planned surgery.
  • Do not take it with warfarin or other blood thinners unless your doctor agrees.
  • Do not give medicinal doses to babies or young children without a doctor's guidance.

When should you see a doctor?

Stop the product and get help right away if you get hives, swelling of the lips or face, or trouble breathing. That can be an allergic reaction. Call emergency services.

Call your doctor within a day if you feel faint, dizzy, shaky, or sweaty. These can be signs of low blood sugar or low blood pressure. Also call if loose stools, belly pain, or a skin rash last more than a few days.

Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.

Reviewed by the HealisticMD editorial team How we grade evidence →

Remedies related to Black Cumin Seed

Black Seed (Nigella sativa)Chlorophyll (liquid)Curry Leaf (Murraya koenigii)Grifola frondosa D-FractionGuduchiGuduchi (Tinospora)Guduchi / Giloy (Tinospora cordifolia)Gymnema SylvestreKalonji Oil (Black Seed Oil)Onion extractRooibos Tea (Aspalathus linearis)Shirisha

People take Black Cumin Seed when they say

Everyday descriptions of the problems this remedy is recommended for.

Conditions where Black Cumin Seed is recommended

Each grade below is for that condition specifically, not for Black Cumin Seed in general.

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