How does kalonji seed work in the body?

Kalonji seeds contain thymoquinone as their primary active compound, which provides anti-inflammatory and antioxidant effects. Thymoquinone modulates immune cell activity, reduces inflammatory cytokines, and may improve insulin sensitivity. The seeds also contain thymol and carvacrol, which contribute to antimicrobial and bronchodilatory effects. These compounds work synergistically to support respiratory health and metabolic function. Evidence Level: C.

Does kalonji interact with any medications?

Yes, kalonji seeds may interact with several medications. Due to their blood sugar-lowering effects, they can enhance the action of diabetes medications, potentially causing hypoglycemia. The seeds may increase bleeding risk when combined with anticoagulants or antiplatelet drugs such as warfarin or aspirin. Additionally, kalonji may lower blood pressure and amplify the effects of antihypertensive medications. Patients taking these medications should consult a healthcare provider before use. Evidence Level: C.

What is the recommended dosage of kalonji seeds for adults?

The typical adult dosage is 1 teaspoon of whole seeds daily, or 500mg of standardized extract taken twice daily. Seeds can be consumed whole, crushed, or brewed as a tea. For metabolic support, consistent daily use over 8-12 weeks may be needed to observe benefits. Start with lower doses to assess tolerance, and always follow product-specific recommendations from reputable manufacturers. Evidence Level: C, Traditional.

Is kalonji seed safe during pregnancy?

Kalonji seeds are considered unsafe during pregnancy, particularly at therapeutic doses. Traditional use and preliminary research suggest the seeds may stimulate uterine contractions and potentially affect pregnancy outcomes. Small culinary amounts used as a spice in food are generally considered acceptable, but medicinal doses should be avoided entirely. Women who are pregnant or planning pregnancy should consult a qualified healthcare practitioner before using kalonji supplements. Evidence Level: C, Traditional.

What are the health benefits of kalonji seeds?

Kalonji seeds have been used traditionally in Indian Unani and Ayurvedic medicine as an immune tonic and respiratory remedy. Modern research suggests potential benefits for blood sugar regulation in type 2 diabetes, blood pressure management, and reducing systemic inflammation. The seeds may also support respiratory health in conditions like asthma due to their bronchodilatory properties. While promising, most evidence comes from preliminary studies, and more rigorous clinical trials are needed. Evidence Level: C, Traditional.

Indian Kalonji Seed (Nigella sativa var. indica)

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 29 PubMed articles · model: gemma4:31b

Summary

Nigella sativa (Kalonji) is a medicinal seed used globally for its anti-inflammatory, antioxidant, and antimicrobial properties [PMID:33281391, PMID:38016656].

Background

Nigella sativa, also known as black seed, black cumin, or Kalonji, is a member of the Ranunculaceae family [PMID:28195061, PMID:32020890]. It is widely used as both a food ingredient and a complementary drug in various traditional medicine systems, including Unani and Ayurveda [PMID:19500003, PMID:31799702].

Traditional uses

Traditionally used for the treatment of several medical disorders including dyslipidemia, obesity, hypertension [PMID:19500003], diarrhea, and asthma [PMID:11381824]. It has also been used orally as a galactogogue in India, Türkiye, and the Middle East [PMID:30000936].

Active compounds

The seeds contain essential and fixed oils featuring thymoquinone, beta-elemene, thymohydroquinone, dithymoquinone, thymol, carvacrol, nigellicine, nigellimine, nigellidine, and alpha-hederin [PMID:30000936, PMID:29358959]. Phytosterols such as spinasterol and schottenol are also identified in the seed oil [PMID:38036874].

Mechanism of action

Nigella sativa exhibits calcium antagonist activity, acting as a calcium channel blocker to produce bronchodilator and spasmolytic effects [PMID:11381824]. It also demonstrates anti-proliferative and apoptotic activity against certain cancer cell lines [PMID:31433749, PMID:32020890].

Clinical evidence

Evidence DHyperlipidemia

Nigella sativa showed significant improvement in the lipid profile of rats, comparable to the effects of simvastatin [PMID:25730783].

Evidence BGingivitis

Ethanolic solutions of N. sativa were explored for clinical efficacy in moderate-to-severe gingivitis patients [PMID:33281391].

Evidence BMetabolic Parameters (Lipids, Blood Sugar, BP, Weight)

A randomized, double-blind trial evaluated the effectiveness of powdered N. sativa in capsules on these parameters in adults [PMID:19500003].

Evidence CLong COVID

N. sativa has shown potential anti-inflammatory, antioxidant, and immunomodulatory properties that may help mitigate Long COVID symptoms [PMID:36825730].

Evidence CHepatitis B and C

Preclinical and clinical investigations suggest N. sativa may be effective against HBV and HCV infections [PMID:39980283].

Safety & adverse effects

Nigella sativa is generally well tolerated, although the oil can cause allergic contact dermatitis [PMID:30000936]. One historical report mentions fatal poisoning by Nigella seed [PMID:13193171].

Pregnancy & lactation

Used as galactogogues, but no scientifically valid clinical trials support this use in humans; one study showed a slight increase in serum prolactin but no evidence of growth promotion in infants [PMID:30000936]. No data exist on excretion into breastmilk or safety in infants [PMID:30000936].

Evidence summary

Evidence ranges from laboratory animal studies (D) and narrative reviews (C) to randomized controlled trials (B). While preclinical data strongly support anti-inflammatory and lipid-lowering effects, high-level clinical evidence for specific human therapeutic doses is limited.

PubMed sources

1.PMID: 30000936 (2006) — Effects of Active Compounds of Nigella sativa in COVID-19: A Narrative Review. · Recent advances in anti-infective drug discovery
2.PMID: 36825730 (2023) — Potential of Black Seeds (Nigella sativa) in the Management of Long COVID or Post-acute Sequelae of COVID-19 (PASC) and Persistent COVID-19 Symptoms - An Insight. · Infectious disorders drug targets
3.PMID: 25730783 (2015) — Comparative evaluation of Nigella sativa (Kalonji) and simvastatin for the treatment of hyperlipidemia and in the induction of hepatotoxicity. · Pakistan journal of pharmaceutical sciences
4.PMID: 33281391 (2019) — An evaluation of the efficacy of ethanolic extract of Nigella sativa L. (Kalonji) on the clinical parameters of moderate‑to‑severe gingivitis: A split‑mouth clinical study. · Ayu
5.PMID: 33172379

Indian Kalonji Seed

Sources & Citations

Ogiri Igbo

Tetrapleura Tetraptera

Evodia Rutaecarpa

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Pregnancy & lactation

Evidence summary

PubMed sources

Government sources

Indian Kalonji Seed

Sources & Citations

Related Herbs

Ogiri Igbo

Tetrapleura Tetraptera

Evodia Rutaecarpa

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Pregnancy & lactation

Evidence summary

PubMed sources

Government sources