Black seed
Nigella sativaBlack seeds were found in Tutankhamun’s tomb.
What is Black seed?
Black seed (Nigella sativa) is a plant of the Ranunculaceae family. Traditions that use it: Anatolia and the Mediterranean. Part used: seeds.
What is Black seed used for?
Traditional use: Sprinkled on flatbreads, pastries and cheeses. Scientific evidence: limited. Its main active compound is thymoquinone.
Is Black seed safe?
Safety label: generally safe. Safe in food amounts. High-dose oil may strengthen blood sugar and blood pressure medicines.
Traditional use
Sprinkled on flatbreads, pastries and cheeses. A hadith calls it a “cure for everything but death”, so its oil is a common home remedy.
Used in Unani and Ayurvedic medicine for breathing and digestive complaints.
In nature
Mix-up risk
Onion seed is sometimes sold as black seed. Black seeds are more angular and smell sharp when crushed.
Preparation
Seeds are added to food; cold-pressed oil is taken by the spoon.
What science says
Its main active compound is thymoquinone. Small clinical studies show slight drops in cholesterol, blood sugar and blood pressure; the studies are short and of low quality.
How strong is the evidence?
Claims often repeated online about Black seed, and what science says today.
| Claim | Evidence | Note |
|---|---|---|
| Lowers cholesterol and blood sugar | Limited evidence | Slight drops in small, short studies of low quality. |
| Lowers blood pressure | Limited evidence | Slight effect in some small studies; no substitute for blood pressure medicine. |
| A cure for everything but death | No evidence | A cultural saying, not a scientific claim. |
| Treats cancer | No evidence | Lab studies exist; no evidence in humans. |
Common mistakes
- Drinking the oil in high doses for long periods: some cases of kidney and liver problems have been reported.
- Taking black seed oil with diabetes medicine without monitoring blood sugar.
- Confusing black seed with black sesame.
Frequently asked
How is black seed oil taken?
Studies usually used 1–3 g a day. Ask a doctor about long-term use and use with medicines.
Can I eat black seed in pregnancy?
No known problem in food amounts; oil or high-dose supplements are not recommended.
Does it help weight loss?
Some studies saw a very small drop; it is no substitute for diet and activity.
Safety
Safe in food amounts. High-dose oil may strengthen blood sugar and blood pressure medicines.
Similar plants
Stinging nettle
Salep orchids
Thyme and oregano
Sources
- ResearchEffects of Nigella sativa supplementation on lipid profiles in adults: an updated systematic review and meta-analysis
- ResearchNigella sativa supplementation improves cardiometabolic indicators in prediabetes and type 2 diabetes: a meta-analysis
- BookBaytop T. Türkiye’de Bitkiler ile Tedavi: Geçmişte ve Bugün. 2. baskı. İstanbul: Nobel Tıp Kitabevleri; 1999.
- Botanical recordKew Plants of the World Online: Nigella sativa
- Titles of research sources are summarised in Turkish on the Turkish page; links open the original English publications.
Written by Edanaz Tınmazlar · Last reviewed: · Türkçe