Plant Comparison
Purple coneflower vs Black Cumin
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.
At a glance
Purple coneflower and Black Cumin: they share 7 indicated uses (arthritis / joint pain, cold & flu, immune support, …); 3 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Purple coneflower | Black Cumin | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 1/10 | 5/10 | Stronger for Black Cumin |
| Cold & flu | 1/10 | 5/10 | Stronger for Black Cumin |
| Immune support | 1/10 | 5/10 | Stronger for Black Cumin |
| Infection (general) | 1/10 | 5/10 | Stronger for Black Cumin |
| Inflammation (general) | 1/10 | 5/10 | Stronger for Black Cumin |
| Skin irritation | 1/10 | 5/10 | Stronger for Black Cumin |
| Wounds | 1/10 | 5/10 | 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
Lipophilic alkamides are considered key immunomodulatory and anti-inflammatory constituents, particularly concentrated in the root.
Antioxidant phenolic compounds contributing to the plant's immunomodulatory activity.
Water-soluble polysaccharides associated with immune-stimulating activity, particularly from the aerial parts.
The principal bioactive constituent of the seed oil, responsible for much of its anti-inflammatory, antioxidant and antimicrobial activity.
The aromatic fraction of the seed, contributing antimicrobial and antioxidant activity.
The bulk lipid fraction of the seed (roughly a third of seed weight by weight), the carrier for the fat-soluble thymoquinone.
Minor isoquinoline-type alkaloids studied for antioxidant activity.
Triterpene saponin studied for anticancer and antiparasitic activity.
Pharmacological Actions
Traditional & Indicated Uses
inferred from anti-inflammatory action
inferred from immunomodulator action
inferred from antimicrobial action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from gastroprotective action
inferred from anti-inflammatory action
inferred from analgesic action
inferred from digestive action
inferred from antidiabetic action
inferred from anticancer action
inferred from immunomodulator action
inferred from analgesic action
inferred from digestive action
inferred from antimicrobial action
inferred from anti-inflammatory action
inferred from antidiabetic action
inferred from anti-inflammatory action
Safety, Cautions & Contraindications
Generally considered safe, but caution advised for those with autoimmune conditions. Not recommended for long-term use (more than 8 weeks continuously).
Duke (2002) rates echinacea as +++ — among the most thoroughly documented herbal immunostimulants. It notes experimental and clinical evidence for immunostimulant, antiviral, and anti-inflammatory activities. Multiple species have been studied (E. purpurea, E. angustifolia, E. pallida), and Duke emphasizes that species identification in commercial products is often unreliable. Commission E approves E. purpurea for supporting immune function during colds and flu. Dose: 900 mg standardized extract daily in acute use; use should be limited to 8 weeks continuous. Contraindicated in autoimmune diseases (MS, lupus, HIV/AIDS), tuberculosis, and with immunosuppressive drugs (cyclosporine) (Duke, 2002).
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.
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).
External Ids
Botanical Description
Robust perennial herb with a basal rosette of coarse, hairy, lance-shaped leaves and tall, sturdy flowering stems. Each stem bears a single large, daisy-like flower head with drooping (reflexed), rose-purple to pink ray florets surrounding a prominent, spiny, orange-brown central cone of disc florets.[4]
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]
Habitat
Native to the tallgrass prairies, open woodland and dry meadows of central and eastern North America; widely cultivated worldwide as a garden and medicinal plant.[4]
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]
Harvesting
The flower heads are picked as they open, in summer; the root is dug in autumn from plants at least two to three years old, when its content of bioactive alkamides and caffeic acid derivatives is highest, then cleaned and dried.[4]
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]
Traditional Uses
Echinacea root was widely used by Native American peoples as a remedy for infections, wounds, snakebite and toothache, and entered nineteenth-century Eclectic medicine as a broad anti-infective. It remains best known today, in standardised aerial-part or root extracts, as a supportive remedy for preventing and shortening the common cold and supporting immune function.[1, 4]
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]
Preparations
Fresh-pressed juice or standardised extract of the aerial parts or root, taken as tablets, drops or capsules at the first sign of a cold; the best-studied clinical form.
Dosage
Clinical trials for the common cold commonly use around 300-900 mg of standardised extract daily, started at the first sign of symptoms and continued for up to 7-10 days; continuous use beyond about 8 weeks is not recommended. Educational reference only, not a prescription.
References
Drug Class Interactions
Lookalikes Review
References & Sources
- Karsch-Völk, M., Barrett, B., Kiefer, D., Bauer, R. et al (2014) 'Echinacea for preventing and treating the common cold', Cochrane Database of Systematic Reviews, 2(2), pp. CD000530. doi:10.1002/14651858.CD000530.pub3 Meta-analysis / review
https://doi.org/10.1002/14651858.CD000530.pub3 - Kamin, W., Seifert, G., Zwiauer, K., Bonhoeffer, J. et al (2025) 'Phytotherapy for acute respiratory tract infections in children: a systematically conducted, comprehensive review', Frontiers in Pediatrics, 13, pp. 1423250. doi:10.3389/fped.2025.1423250 Meta-analysis / review
https://doi.org/10.3389/fped.2025.1423250 - Fashner, J., Ericson, K. and Werner, S (2012) 'Treatment of the common cold in children and adults', American Family Physician, 86(2), pp. 153-159. Available at: https://pubmed.ncbi.nlm.nih.gov/22962927/ Traditional / reference
https://pubmed.ncbi.nlm.nih.gov/22962927/ - Manayi, A., Vazirian, M. and Saeidnia, S (2015) 'Echinacea purpurea: Pharmacology, phytochemistry and analysis methods', Pharmacognosy Reviews, 9(17), pp. 63-72. doi:10.4103/0973-7847.156353 Meta-analysis / review
https://doi.org/10.4103/0973-7847.156353 - Burlou-Nagy, C., Banica, F., Jurca, T., Vicas, L.G., Marian, E., Muresan, M.E., Bacskay, I., Kiss, R., Feher, P. and Pallag, A (2022) 'Echinacea purpurea (L.) Moench: Biological and Pharmacological Properties. A Review', Plants, 11(9), pp. 1244. doi:10.3390/plants11091244 Meta-analysis / review
https://doi.org/10.3390/plants11091244 - Hall, H., Fahlman, M.M. and Engels, H.J (2007) 'Echinacea purpurea and mucosal immunity', International Journal of Sports Medicine, 28(9), pp. 792-797. doi:10.1055/s-2007-964895 Randomized trial
https://doi.org/10.1055/s-2007-964895 - Ross, S.M (2016) 'Echinacea purpurea: A Proprietary Extract of Echinacea purpurea Is Shown to be Safe and Effective in the Prevention of the Common Cold', Holistic Nursing Practice, 30(1), pp. 54-57. doi:10.1097/HNP.0000000000000130 Meta-analysis / review
https://doi.org/10.1097/HNP.0000000000000130 - Hudson, J.B (2011) 'Applications of the phytomedicine Echinacea purpurea (Purple Coneflower) in infectious diseases', Journal of Biomedicine & Biotechnology, 2012, pp. 769896. doi:10.1155/2012/769896 Meta-analysis / review
https://doi.org/10.1155/2012/769896 - Mishima, S., Saito, K., Maruyama, H., Inoue, M., Yamashita, T., Ishida, T. and Gu, Y (2004) 'Antioxidant and immuno-enhancing effects of Echinacea purpurea', Biological & Pharmaceutical Bulletin, 27(7), pp. 1004-1009. doi:10.1248/bpb.27.1004 Preclinical
https://doi.org/10.1248/bpb.27.1004 - Saunders, P.R., Smith, F. and Schusky, R.W (2007) 'Echinacea purpurea L. in children: safety, tolerability, compliance, and clinical effectiveness in upper respiratory tract infections', Canadian Journal of Physiology and Pharmacology, 85(11), pp. 1195-1199. doi:10.1139/Y07-103 Clinical study
https://doi.org/10.1139/Y07-103 - Micheli, L., Maggini, V., Ciampi, C., Gallo, E., Bogani, P., Fani, R., Pistelli, L., Ghelardini, C., Di Cesare Mannelli, L., De Leo, M. and Firenzuoli, F (2022) 'Echinacea purpurea against neuropathic pain: Alkamides versus polyphenols efficacy', Phytotherapy Research, 37(5), pp. 1911-1923. doi:10.1002/ptr.7709 Preclinical
https://doi.org/10.1002/ptr.7709 - Gholami, M., Amri, J., Pazhoohan, S. and Sadegh, M (2021) 'Anticonvulsive and anti-epileptogenesis effects of Echinacea purpurea root extract, an involvement of CB2 receptor', Journal of Complementary & Integrative Medicine, 19(4), pp. 879-886. doi:10.1515/jcim-2020-0219 Preclinical
https://doi.org/10.1515/jcim-2020-0219 - Awortwe, C., Bruckmueller, H., Kaehler, M. and Cascorbi, I (2021) 'Interaction of Phytocompounds of Echinacea purpurea with ABCB1 and ABCG2 Efflux Transporters', Molecular Pharmaceutics, 18(4), pp. 1622-1633. doi:10.1021/acs.molpharmaceut.0c01075 Preclinical
https://doi.org/10.1021/acs.molpharmaceut.0c01075 - Perry, N.B., van Klink, J.W., Burgess, E.J. and Parmenter, G.A (1997) 'Alkamide levels in Echinacea purpurea: a rapid analytical method revealing differences among roots, rhizomes, stems, leaves and flowers', Planta Medica, 63(1), pp. 58-62. doi:10.1055/s-2006-957605 Preclinical
https://doi.org/10.1055/s-2006-957605 - Linde, K., Barrett, B., Wölkart, K., Bauer, R. and Melchart, D (2006) 'Echinacea for preventing and treating the common cold'. Traditional / reference
https://scholar.google.com/scholar?q=Echinacea%20for%20preventing%20and%20treating%20the%20common%20cold - Sharma, M., Schoop, R., Suter, A. and Schoop, W (2010) 'The possibility of prophylactic treatment of streptococcal pharyngotonsillitis with a standardized Echinacea preparation', 29(8), pp. 1025--1035. Traditional / reference
https://scholar.google.com/scholar?q=The%20possibility%20of%20prophylactic%20treatment%20of%20streptococcal%20pharyngotonsillitis%20with%20a%20standardized%20Echinacea%20preparation - World Health Organization (1999) 'WHO Monographs on Selected Medicinal Plants'. Traditional / reference
https://scholar.google.com/scholar?q=WHO%20Monographs%20on%20Selected%20Medicinal%20Plants - Duke, J.A (2002) 'Handbook of Medicinal Herbs, Second Edition'. Traditional / reference
https://scholar.google.com/scholar?q=Handbook%20of%20Medicinal%20Herbs%2C%20Second%20Edition - Gorski, J.C., Huang, S.M., Pinto, A., Hamman, M.A., Hilligoss, J.K., Zaheer, N.A., Desai, M., Miller, M. and Hall, S.D (2004) 'The effect of echinacea (Echinacea purpurea root) on cytochrome P450 activity in vivo', Clinical Pharmacology and Therapeutics, 75(1), pp. 89-100. doi:10.1016/j.clpt.2003.09.013 Clinical study
https://doi.org/10.1016/j.clpt.2003.09.013
- Hannan, M.A., Rahman, M.A., Sohag, A.A.M., Uddin, M.J., Dash, R., Sikder, M.H., Rahman, M.S., Timalsina, B., Munni, Y.A. and Sarker, P.P (2021) 'Black Cumin (Nigella sativa L.): A Comprehensive Review on Phytochemistry, Health Benefits, Molecular Pharmacology, and Safety', Nutrients, 13(6), pp. 1784. doi:10.3390/nu13061784 Meta-analysis / review
https://doi.org/10.3390/nu13061784 - Ahmad, A., Husain, A., Mujeeb, M., Khan, S.A., Najmi, A.K., Siddique, N.A., Damanhouri, Z.A. and Anwar, F (2013) 'A review on therapeutic potential of Nigella sativa: A miracle herb', Asian Pacific Journal of Tropical Biomedicine, 3(5), pp. 337-352. doi:10.1016/S2221-1691(13)60075-1 Meta-analysis / review
https://doi.org/10.1016/S2221-1691(13)60075-1 - Chatterjee, G., Saha, A.K., Khurshid, S. and Saha, A (2025) 'A Comprehensive Review of the Antioxidant, Antimicrobial, and Therapeutic Efficacies of Black Cumin (Nigella sativa L.) Seed Oil and Its Thymoquinone', Journal of Medicinal Food, 28(4), pp. 325-339. doi:10.1089/jmf.2024.k.0149 Meta-analysis / review
https://doi.org/10.1089/jmf.2024.k.0149 - Majdalawieh, A.F. and Fayyad, M.W (2015) 'Immunomodulatory and anti-inflammatory action of Nigella sativa and thymoquinone: A comprehensive review', International Immunopharmacology, 28(1), pp. 295-304. doi:10.1016/j.intimp.2015.06.023 Meta-analysis / review
https://doi.org/10.1016/j.intimp.2015.06.023 - Shaukat, A., Zaidi, A., Anwar, H. and Kizilbash, N (2023) 'Mechanism of the antidiabetic action of Nigella sativa and Thymoquinone: a review', Frontiers in Nutrition, 10, pp. 1126272. doi:10.3389/fnut.2023.1126272 Meta-analysis / review
https://doi.org/10.3389/fnut.2023.1126272 - Beheshti, F., Khazaei, M. and Hosseini, M (2016) 'Neuropharmacological effects of Nigella sativa', Avicenna Journal of Phytomedicine, 6(1), pp. 104-116. Meta-analysis / review
https://scholar.google.com/scholar?q=Neuropharmacological%20effects%20of%20Nigella%20sativa - Shafiq, H., Ahmad, A., Masud, T. and Kaleem, M (2014) 'Cardio-protective and anti-cancer therapeutic potential of Nigella sativa', Iranian Journal of Basic Medical Sciences, 17(12), pp. 967-979. Meta-analysis / review
https://scholar.google.com/scholar?q=Cardio-protective%20and%20anti-cancer%20therapeutic%20potential%20of%20Nigella%20sativa - Bordoni, L., Fedeli, D., Nasuti, C., Maggi, F., Papa, F., Wabitsch, M., De Caterina, R. and Gabbianelli, R (2019) 'Antioxidant and Anti-Inflammatory Properties of Nigella sativa Oil in Human Pre-Adipocytes', Antioxidants, 8(2), pp. 51. doi:10.3390/antiox8020051 Preclinical
https://doi.org/10.3390/antiox8020051 - Gholamnezhad, Z., Havakhah, S. and Boskabady, M.H (2016) 'Preclinical and clinical effects of Nigella sativa and its constituent, thymoquinone: A review', Journal of Ethnopharmacology, 190, pp. 372-386. doi:10.1016/j.jep.2016.06.061 Meta-analysis / review
https://doi.org/10.1016/j.jep.2016.06.061 - Ali, B.H. and Blunden, G (2003) 'Pharmacological and toxicological properties of Nigella sativa', Phytotherapy Research, 17(4), pp. 299-305. doi:10.1002/ptr.1309 Meta-analysis / review
https://doi.org/10.1002/ptr.1309 - Al-Attass, S.A., Zahran, F.M. and Turkistany, S.A (2016) 'Nigella sativa and its active constituent thymoquinone in oral health', Saudi Medical Journal, 37(3), pp. 235-244. doi:10.15537/smj.2016.3.13006 Meta-analysis / review
https://doi.org/10.15537/smj.2016.3.13006 - Ahmad A, Husain A, Mujeeb M, et al. A review on therapeutic potential of Nigella sativa: A miracle herb. Asian Pac J Trop Biomed. 2013;3 (2013) ';3(5):337-352', 3(5). Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC3642442/ Traditional / reference
https://pmc.ncbi.nlm.nih.gov/articles/PMC3642442/ - Darakhshan S, Bidmeshki Pour A, Hosseinzadeh Colagar A, Sisakhtnezhad S. Thymoquinone and its therapeutic potentials. Pharmacol Res. 2015;95-96:138-158. https://pmc.ncbi.nlm.nih.gov/articles/PMC4387230/ (2015) ';95-96:138-158'. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC4387230/ Traditional / reference
https://pmc.ncbi.nlm.nih.gov/articles/PMC4387230/ - Forouzanfar F, Bazzaz BSF, Hosseinzadeh H. A review of ethnobotany, phytochemistry, antimicrobial pharmacology and toxicology of Nigella sativa L. Biomed Pharmacother. 2021;142:112040. https://www.sciencedirect.com/science/article/pii/S0753332221009665 (2021) ';142:112040'. Available at: https://www.sciencedirect.com/science/article/pii/S0753332221009665 Traditional / reference
https://www.sciencedirect.com/science/article/pii/S0753332221009665 - Gholamnezhad Z, Keyhanmanesh R, Boskabady MH. Anti-inflammatory, antioxidant, and immunomodulatory aspects of Nigella sativa for its preventive and bronchodilatory effects on obstructive respiratory diseases. Biomed Pharmacother. 2021;136:111240. https://www.sciencedirect.com/science/article/pii/S0753332221002778 (2021) ';136:111240'. Available at: https://www.sciencedirect.com/science/article/pii/S0753332221002778 Traditional / reference
https://www.sciencedirect.com/science/article/pii/S0753332221002778 - Hannan MA, Rahman MA, Sohag AAM, et al. Black cumin (2021) ';13(6):1784', 13(6). doi:10.3389/fphar.2021.625386/full Randomized trial
https://doi.org/10.3389/fphar.2021.625386/full - Kooti W, Hasanzadeh-Noohi Z, Sharafi-Ahvazi N, et al. Phytochemistry, pharmacology, and therapeutic uses of black seed (2016) ';22(3):231-237', 22(3). Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC8225153/ Traditional / reference
https://pmc.ncbi.nlm.nih.gov/articles/PMC8225153/ - Tavakkoli A, Mahdian V, Razavi BM, Hosseinzadeh H. Review on clinical trials of black seed (2017) ';20(3):179-193', 20(3). Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC5633670/ Traditional / reference
https://pmc.ncbi.nlm.nih.gov/articles/PMC5633670/ - Duke, J.A (2002) 'Handbook of Medicinal Herbs, Second Edition'. Traditional / reference
https://scholar.google.com/scholar?q=Handbook%20of%20Medicinal%20Herbs%2C%20Second%20Edition - Saadati, S., Naseri, K., Asbaghi, O., Abhari, K., Zhang, P., Li, H.B. and Gan, R.Y (2022) 'Nigella sativa supplementation improves cardiometabolic indicators in population with prediabetes and type 2 diabetes mellitus: A systematic review and meta-analysis of randomized controlled trials', Frontiers in Nutrition, 9, pp. 977756. doi:10.3389/fnut.2022.977756 Meta-analysis / review
https://doi.org/10.3389/fnut.2022.977756 - Willcox, M.L., Elugbaju, C., Al-Anbaki, M., Lown, M. and Graz, B (2021) 'Effectiveness of Medicinal Plants for Glycaemic Control in Type 2 Diabetes: An Overview of Meta-Analyses of Clinical Trials', Frontiers in Pharmacology, 12, pp. 777561. doi:10.3389/fphar.2021.777561 Meta-analysis / review
https://doi.org/10.3389/fphar.2021.777561 - Daryabeygi-Khotbehsara, R., Golzarand, M., Ghaffari, M.P. and Djafarian, K (2017) 'Nigella sativa improves glucose homeostasis and serum lipids in type 2 diabetes: a systematic review and meta-analysis', Complementary Therapies in Medicine, 35, pp. 6-13. doi:10.1016/j.ctim.2017.08.016 Meta-analysis / review
https://doi.org/10.1016/j.ctim.2017.08.016 - Sahebkar, A., Soranna, D., Liu, X., Thomopoulos, C., Simental-Mendia, L.E., Derosa, G., Maffioli, P. and Parati, G (2016) 'A systematic review and meta-analysis of randomized controlled trials investigating the effects of supplementation with Nigella sativa (black seed) on blood pressure', Journal of Hypertension, 34(11), pp. 2127-2135. doi:10.1097/HJH.0000000000001049 Meta-analysis / review
https://doi.org/10.1097/HJH.0000000000001049 - Kavyani, Z., Musazadeh, V., Safaei, E., Mohammadi Asmaroud, M., Khashakichafi, F., Ahrabi, S.S. and Dehghan, P (2023) 'Antihypertensive effects of Nigella sativa supplementation: an updated systematic review and meta-analysis of randomized controlled trials', Phytotherapy Research, 37(8), pp. 3224-3238. doi:10.1002/ptr.7891 Meta-analysis / review
https://doi.org/10.1002/ptr.7891
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.