Plant Comparison

Black Cumin vs Stinging Nettle

A side-by-side comparison of two medicinal plants — every documented constituent, action, use, safety note and cited source, assembled automatically from the Omnia Sana database.

First plant

Second plant

Plant ABlack CuminNigella sativaRanunculaceaeFull monograph →

Plant BStinging NettleUrtica dioicaUrticaceaeFull monograph →

At a glance

Black Cumin and Stinging Nettle: they share 7 indicated uses (arthritis / joint pain, back pain, cancer (anticancer research), …); 4 pharmacological actions in common.

Black CuminStinging Nettle

Constituents54

Pharmacological actions96

Indicated uses1710

Safety notes22

Cited sources2415

Indicated uses

Only Black Cumin

Acid refluxBloatingBlood sugar / diabetes supportHeadacheIndigestionInfection (general)Metabolic supportPain (general)Respiratory supportWounds

Shared (7)

Arthritis / joint painBack painCancer (anticancer research)Cold & fluImmune supportInflammation (general)Skin irritation

Only Stinging Nettle

Swelling / fluid retentionUrinary supportUrinary tract infection (UTI)

Pharmacological actions

Only Black Cumin

Analgesic (pain relief)Antidiabetic (blood-sugar lowering)AntimicrobialDigestive aidGastroprotective

Shared (4)

Anti-inflammatoryAnticancer (preclinical)AntioxidantImmunomodulator / immune support

Only Stinging Nettle

Anti-rheumatic / anti-arthriticDiuretic

Evidence face-off — shared uses

Condition	Black Cumin	Stinging Nettle	Verdict
Arthritis / joint pain	5/10	7/10	Stronger for Stinging Nettle
Back pain	5/10	1/10	Stronger for Black Cumin
Cancer (anticancer research)	7/10	7/10	Comparable evidence
Cold & flu	5/10	1/10	Stronger for Black Cumin
Immune support	5/10	1/10	Stronger for Black Cumin
Inflammation (general)	5/10	1/10	Stronger for Black Cumin
Skin irritation	5/10	1/10	Stronger for Black Cumin

Evidence scores (1–10) are computed from the tier of each cited source. “Comparable” means the two scores are within one point. Follow a score to its detailed sources.

Key Constituents

Thymoquinone^{[3, 9]}

The principal bioactive constituent of the seed oil, responsible for much of its anti-inflammatory, antioxidant and antimicrobial activity.

Volatile oil (nigellone, thymol, carvacrol)^[3]

The aromatic fraction of the seed, contributing antimicrobial and antioxidant activity.

Essential (volatile) oilThymolCarvacrol

Fixed oil (linoleic acid, oleic acid)^[1]

The bulk lipid fraction of the seed (roughly a third of seed weight by weight), the carrier for the fat-soluble thymoquinone.

Alkaloids (nigellicine, nigellidine)^[1]

Minor isoquinoline-type alkaloids studied for antioxidant activity.

Alkaloids

Saponins (alpha-hederin)^[1]

Triterpene saponin studied for anticancer and antiparasitic activity.

Saponins

Flavonoids (quercetin, kaempferol glycosides)^[12]

Contribute to the antioxidant and anti-inflammatory action.

FlavonoidsQuercetin

Phenolic acids^[12]

Antioxidant phenolics found throughout the leaf.

Phenolic acids

Sterols (beta-sitosterol) and lignans (root)^[13]

Thought to underlie the root's traditional use for BPH-related urinary symptoms.

PhytosterolsLignans

Histamine, formic acid, acetylcholine (stinging hairs)^[11]

The irritant compounds responsible for the fresh plant's sting; destroyed by cooking, drying or freeze-drying.

Pharmacological Actions

Analgesic (pain relief)^{[6, 12, 13, 14, 15, 16, 17, 18]}

Anti-inflammatory^{[1, 2, 4, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18]}

Anticancer (preclinical)^{[7, 12, 13, 14, 15, 16, 17, 18]}

Antidiabetic (blood-sugar lowering)^{[5, 12, 13, 14, 15, 16, 17, 18]}

Antimicrobial^{[3, 11, 12, 13, 14, 15, 16, 17, 18]}

Antioxidant^{[1, 3, 8, 12, 13, 14, 15, 16, 17, 18]}

Digestive aid^{[12, 13, 14, 15, 16, 17, 18]}

Gastroprotective^{[12, 13, 14, 15, 16, 17, 18]}

Immunomodulator / immune support^{[4, 12, 13, 14, 15, 16, 17, 18]}

Anti-inflammatory^{[2, 5, 8, 9, 11, 12, 13]}

Anti-rheumatic / anti-arthritic^{[5, 9, 11, 12, 13]}

Anticancer (preclinical)^[3]

Antioxidant^{[1, 2, 8, 9, 11, 12, 13]}

Diuretic^{[8, 9, 11, 12, 13]}

Immunomodulator / immune support^{[11, 12, 13]}

Traditional & Indicated Uses

Acid reflux^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from gastroprotective action

Evidence: 5

Label: Acid reflux

Arthritis / joint pain^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5

Label: Arthritis / joint pain

Back pain^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from analgesic action

Evidence: 5

Label: Back pain

Bloating^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from digestive action

Evidence: 5

Label: Bloating

Blood sugar / diabetes support^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from antidiabetic action

Evidence: 5

Label: Blood sugar / diabetes support

Cancer (anticancer research)^[7]Good · 7/10

inferred from anticancer action

Evidence: 7

Label: Cancer (anticancer research)

Cold & flu^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from immunomodulator action

Evidence: 5

Label: Cold & flu

Headache^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from analgesic action

Evidence: 5

Label: Headache

Immune support^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

Evidence: 5

Label: Immune support

Indigestion^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from digestive action

Evidence: 5

Label: Indigestion

Infection (general)^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from antimicrobial action

Evidence: 5

Label: Infection (general)

Inflammation (general)^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5

Label: Inflammation (general)

Metabolic support^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from antidiabetic action

Evidence: 5

Label: Metabolic support

Pain (general)^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

Evidence: 5

Label: Pain (general)

Respiratory support^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

Evidence: 5

Label: Respiratory support

Skin irritation^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5

Label: Skin irritation

Wounds^{[12, 13, 14, 15, 16, 17, 18]}Moderate · 5/10

inferred from antimicrobial action

Evidence: 5

Label: Wounds

Arthritis / joint pain^{[5, 11, 12, 13]}Good · 7/10

Evidence: 7

Label: Arthritis / joint pain

Back pain^{[11, 12, 13]}Traditional · 1/10

inferred from anti-rheumatic action

Evidence: 1

Label: Back pain

Cancer (anticancer research)^[3]Good · 7/10

inferred from anticancer action

Evidence: 7

Label: Cancer (anticancer research)

Cold & flu^{[11, 12, 13]}Traditional · 1/10

inferred from immunomodulator action

Evidence: 1

Label: Cold & flu

Immune support^{[11, 12, 13]}Traditional · 1/10

Evidence: 1

Label: Immune support

Inflammation (general)^{[11, 12, 13]}Traditional · 1/10

inferred from anti-inflammatory action

Evidence: 1

Label: Inflammation (general)

Skin irritation^{[11, 12, 13]}Traditional · 1/10

inferred from anti-inflammatory action

Evidence: 1

Label: Skin irritation

Swelling / fluid retention^{[11, 12, 13]}Traditional · 1/10

inferred from diuretic action

Evidence: 1

Label: Swelling / fluid retention

Urinary support^{[6, 7, 10, 11, 12, 13]}Good · 7/10

Evidence: 7

Label: Urinary support

Urinary tract infection (UTI)^{[11, 12, 13]}Traditional · 1/10

inferred from diuretic action

Evidence: 1

Label: Urinary tract infection (UTI)

Safety, Cautions & Contraindications

Safety note^{[12, 13, 14, 15, 16, 17, 18]}Caution

Generally well-tolerated in clinical trials at doses up to 200 mg/day of oil for 90 days. Potential side effects may include mild gastrointestinal discomfort. Contraindicated during pregnancy due to potential uterine stimulant effects. May interact with immunosuppressants and antidiabetic medications. Allergic reactions possible in sensitive individuals. Consult healthcare provider before use, especially with concurrent medications.

Safety note^{[12, 13, 14, 15, 16, 17, 18, 19]}Caution

Duke (2002) describes black cumin (Nigella sativa) as one of the most multi-active medicinal spices, with experimental evidence for bronchodilation, immunostimulation, hepatoprotection, and antihistaminic activity. The prophet Muhammad reportedly described it as 'a cure for all things except death.' Key bioactive compounds include thymoquinone and nigellone. Antihistaminic and bronchodilatory activity supports its traditional use in asthma and allergic conditions. Duke notes it is generally safe at culinary amounts but recommends caution with medicinal doses in pregnancy due to potential uterotonic effects (Duke, 2002).

Safety note^{[11, 12, 13]}Caution

Fresh plant causes stinging skin reaction (formic acid, histamine). Once cooked, dried, or freeze-dried, this is eliminated. Root tincture may interact with diuretics, antihypertensives, and antidiabetic drugs. Generally very safe in culinary and standard medicinal use. Avoid very high doses in pregnancy.

Safety note^{[11, 12, 13, 15]}Info

Duke (2002) rates stinging nettle as +++ and provides clinical evidence (score 2) for antiprostatitic activity (BPH — benign prostatic hyperplasia), consistent with Commission E approval for irritative urination symptoms associated with BPH. Dose: 4–6 g dried herb daily or 600–1200 mg root extract. The root preparations are used for BPH while leaf preparations are used for antiallergic and anti-inflammatory purposes. Duke also notes experimental antiarthritic and analgesic activity. Generally safe; the most common adverse effect is mild gastrointestinal upset (Duke, 2002).

External Ids

Gbif: 5371700

Wikidata: Q160575

Gbif: 7960979

Powo: urn:lsid:ipni.org:names:260630-2

Wikidata: Q155909

Botanical Description

Annual herb (Ranunculaceae), 20-90 cm tall, with an erect, branched stem and finely divided, pinnately dissected, fern-like leaves. Delicate pale blue-white (occasionally pale purple) flowers, each with 5-10 petal-like sepals, are surrounded by a feathery bract collar. The fruit is an inflated, many-celled capsule that dries and splits to release numerous small, black, angular seeds - the medicinal part.^[1]

Height: 20-90 cm

Habit: Erect, branched annual herb

Leaves: Finely pinnately dissected, fern-like

Flowers: Pale blue-white (occasionally pale purple), 5-10 petal-like sepals, feathery bract collar

Stem: Erect, branched

Root: Slender taproot

Fruit: Inflated capsule splitting to release small black angular seeds

Flowering Period: June-August

Tall, upright perennial herb with square stems and opposite, deeply toothed, heart-shaped to lance-shaped leaves covered in fine stinging hairs that inject formic acid and histamine on contact. Tiny, greenish, petal-less flowers hang in branched, drooping clusters from the leaf axils.^[11]

Height: 60-150 cm

Habit: Tall, upright, spreading perennial herb, often forming dense colonies via creeping rhizomes

Leaves: Opposite, deeply toothed, heart-shaped to lance-shaped, densely covered in stinging hairs

Flowers: Tiny, greenish, petal-less, in branched drooping axillary clusters (catkin-like)

Stem: Square, upright, covered in stinging hairs

Root: Extensive creeping rhizome and fibrous roots

Fruit: Small dry seed (achene)

Flowering Period: June-September

Habitat

Native to the Mediterranean basin, southern Europe, western Asia and North Africa, and widely cultivated as a spice and medicinal crop across the Middle East, South Asia and North Africa; grows in cultivated fields and on disturbed ground.^[1]

Grows abundantly on nitrogen-rich waste ground, hedgerows, riverbanks, woodland edges and disturbed soil; native to Europe, Asia, North Africa and North America and now found nearly worldwide.^[11]

Harvesting

Seed capsules are harvested once dried and brown (late summer), then threshed to release the small black seeds. Seed is stored whole and either used directly or cold-pressed for oil shortly before use to preserve the volatile thymoquinone-rich fraction.^[1]

Parts: Seed

Season: Late summer, once capsules have dried

Young leaves and tops are gathered in spring before flowering, when stinging is least severe and nutrient content highest, using gloves; the root is dug in autumn or spring; seed is collected when ripe in late summer. Cooking, drying or freeze-drying neutralises the sting.^[11]

Parts: Leaf, Root, Seed

Season: Leaf in spring; root autumn/spring; seed late summer

Traditional Uses

One of the most celebrated medicinal seeds in Middle Eastern and Islamic traditional medicine - known as 'Habbatul Barakah' (the blessed seed) - black seed has traditionally been used for digestive complaints, respiratory conditions (asthma, cough), pain, inflammation, skin conditions and as a general tonic. Modern research on its principal constituent thymoquinone supports broad anti-inflammatory, antioxidant, antimicrobial, antidiabetic and immunomodulatory activity.^{[1, 2, 9]}

Nettle leaf has a long tradition as a nutritive spring tonic, diuretic and anti-inflammatory remedy for joint pain and rheumatism, while the root has a well-documented traditional and modern use for the irritative urinary symptoms of benign prostatic hyperplasia; the seed has a lighter tradition as a kidney tonic.^{[11, 12, 13]}

Preparations

Whole or ground seed^[1]

Seed eaten directly, sprinkled on food, or ground into a paste - the traditional culinary-medicinal form.

Cold-pressed seed oil^{[3, 9]}

The form most used in clinical trials, taken orally in capsules or as a liquid.

Infusion (leaf)^[11]

Dried or fresh (cooked/wilted) leaf infused in hot water as a traditional nutritive, diuretic spring tonic tea.

Root extract/tincture^[13]

Standardized root extract or tincture, traditionally used for BPH-related urinary symptoms.

Dosage

Seed oil^{[12, 13, 14, 15, 16, 17, 18]}

Clinical trials have generally been well tolerated at doses up to about 200 mg/day of oil taken for up to 90 days. Educational reference only, not a prescription; avoid medicinal doses in pregnancy.

Leaf infusion^[14]

The EU herbal monograph on nettle leaf gives 2-4 g as a single dose for herbal tea, 3-6 times daily, for a daily dose equivalent to 8-12 g, in adolescents, adults and elderly; a 1:5 liquid extract at 30-40 drops 3-4 times daily and several dry extracts are also listed. Not to be used for more than 4 weeks, and not recommended under 12 years. Educational reference only, not a prescription.

Root extract^[13]

Traditional and Commission E sources suggest around 600-1200 mg root extract daily for BPH-related urinary symptoms. Educational reference only, not a prescription.

References

REF-2065, REF-2066, REF-2067, REF-2068, REF-2069, REF-2070, REF-2071, REF-2072, REF-2073, REF-2074, REF-2075

REF-1328, REF-1329, REF-1330, REF-1331, REF-1332, REF-1333, REF-1334, REF-1335, REF-1336, REF-1337

Drug Class Interactions

Safety note^{[20, 21, 22]}Caution

Drug Class: antidiabetics

Mechanism: Black seed (Nigella sativa) lowers fasting blood glucose and HbA1c in trials in people with prediabetes and type 2 diabetes (confirmed by meta-analysis); combined with diabetes medicines it may add to blood-sugar lowering, so monitor blood sugar.

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-03

Safety note^{[23, 24]}Caution

Drug Class: antihypertensives

Mechanism: Black seed (Nigella sativa) modestly lowers blood pressure - two meta-analyses of randomised trials found reductions of roughly 3 mmHg systolic and 3 mmHg diastolic. Combined with blood-pressure medicines it may add to their effect, so monitor your blood pressure.

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-03

Not documented

Lookalikes Review

Outcome: none-known

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-07

Outcome: none-known

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-07

References & Sources

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https://doi.org/10.3389/fphar.2021.625386/full
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Durovic, S., Kojic, I., Radic, D., Smyatskaya, Y.A. and others (2024) 'Chemical Constituents of Stinging Nettle (Urtica dioica L.): A Comprehensive Review on Phenolic and Polyphenolic Compounds and Their Bioactivity', International Journal of Molecular Sciences, 25(6), pp. 3430. doi:10.3390/ijms25063430 Meta-analysis / review
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Ziaei, R., Foshati, S., Hadi, A., Kermani, M.A.H. and others (2020) 'The effect of nettle (Urtica dioica) supplementation on the glycemic control of patients with type 2 diabetes mellitus: A systematic review and meta-analysis', Phytotherapy Research, 34(2), pp. 282-294. doi:10.1002/ptr.6535 Meta-analysis / review
https://doi.org/10.1002/ptr.6535
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Generated automatically from the Omnia Sana plant database and its cited sources. For educational purposes only — not medical advice. Always consult a qualified practitioner before using medicinal plants.