Plant Comparison
Blessed Thistle vs Tansy
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
Blessed Thistle and Tansy: both belong to the Asteraceae family; they share 7 indicated uses (arthritis / joint pain, bloating, indigestion, …); 3 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Blessed Thistle | Tansy | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 1/10 | 1/10 | Comparable evidence |
| Bloating | 1/10 | 1/10 | Comparable evidence |
| Indigestion | 1/10 | 1/10 | Comparable evidence |
| Infection (general) | 1/10 | 2/10 | Comparable evidence |
| Inflammation (general) | 1/10 | 1/10 | Comparable evidence |
| Skin irritation | 1/10 | 1/10 | Comparable evidence |
| Wounds | 1/10 | 1/10 | Comparable evidence |
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
Thujone is the neurotoxic, safety-limiting constituent responsible for tansy's real internal-use toxicity.
Contribute to the plant's bitter taste and antimicrobial activity.
Pharmacological Actions
Appetite stimulant for loss of appetite (approved use under German Commission E)
Bitter digestive / stomachic for indigestion and dyspepsia (stimulates saliva and gastric secretion)
Bitter digestive / stomachic for indigestion and dyspepsia (stimulates saliva and gastric secretion)
Traditional & Indicated Uses
Appetite stimulant for loss of appetite (approved use under German Commission E)
inferred from anti-inflammatory action
inferred from anticancer action
Bitter digestive / stomachic for indigestion and dyspepsia (stimulates saliva and gastric secretion)
inferred from antimicrobial action
inferred from anti-inflammatory action
Galactagogue to support breast-milk supply (traditional; no valid clinical-trial evidence)
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from digestive action
inferred from antimicrobial action
inferred from anti-inflammatory action
inferred from antispasmodic action
inferred from antispasmodic action
inferred from anti-inflammatory action
Safety, Cautions & Contraindications
As a member of the daisy family (Asteraceae/ragweed), it can cause allergic reactions in sensitive people; high doses reportedly cause stomach cramps, nausea and vomiting.
Avoid during pregnancy because of a traditional uterine-stimulating reputation.
Although traditionally used to support milk supply, there is no scientifically valid clinical evidence for the galactagogue use.
CAUTION: Tansy is considered toxic in medicinal doses and is NOT recommended for internal use. Thujone can cause convulsions, liver and kidney damage. Contraindicated in pregnancy (uterotonic and abortifacient). External use (as insect repellent) is generally safe. For information and historical reference only — do not use internally.
Duke (2002) rates tansy as ++ but emphasizes important safety concerns. The plant contains thujone (a neurotoxic ketone) and camphor, making it potentially toxic with internal use. Documented activities include emmenagogue, abortifacient (score 1), and insecticide. Duke strongly cautions against internal use except under professional supervision, noting that historical cases of tansy poisoning have resulted in convulsions and death. Topical use as an insect repellent is safer but should still avoid prolonged skin contact due to the essential oil's sensitizing potential. Strictly contraindicated in pregnancy (Duke, 2002).
External Ids
Botanical Description
Branching annual herb with a hairy, reddish, ridged stem and spiny, deeply lobed leaves with prominent pale veins. The flower heads are pale yellow, thistle-like, surrounded by a whorl of spiny, leaf-like bracts, giving the plant its 'spotted thistle' appearance.[4]
Aromatic perennial herb (Asteraceae), 50-120 cm tall, with erect, reddish, ridged stems. Leaves are finely divided, fern-like and strongly camphor-scented. Flat-topped clusters of small, yellow, button-like flower heads lack ray florets (petals).[11]
Habitat
Grows on dry, sunny waste ground, roadsides and rocky slopes; native to the Mediterranean region and Western Asia and naturalised elsewhere as a garden escape.[4]
Native to Europe and temperate Asia, widely naturalised elsewhere; grows on roadsides, waste ground, riverbanks and disturbed grassland.[11]
Harvesting
The flowering aerial parts are cut as the plant comes into flower, in summer, and dried in a warm, shaded, airy place to preserve the bitter principle cnicin.[4]
Flowering aerial parts are cut in summer, when in full flower, and dried for external/historical use; given this plant's real toxicity (thujone content) at internal doses, this record does not recommend or describe internal harvesting for medicinal consumption.[11]
Traditional Uses
Blessed thistle has a long European folk reputation as a bitter digestive tonic for loss of appetite and dyspepsia (an approved use under German Commission E) and, more anecdotally, as a traditional galactagogue to support breast-milk supply, though robust clinical evidence for the latter is lacking.[4, 11]
Tansy has a long European history as a strewing herb, insect repellent and, historically, an internal vermifuge and emmenagogue, but its thujone and camphor content make internal medicinal use unsafe by modern standards. Today it is used, with caution, mainly as an external insect repellent; the traditional internal uses are recorded here for historical reference only, not as a recommendation.[11]
Preparations
Dried flowering herb infused briefly in hot water as a bitter digestive tea, taken before meals.
Dosage
Traditional herbal references suggest around 1-2 g of dried herb per cup, taken before meals, up to three times daily. Educational reference only, not a prescription.
Tansy is NOT recommended for internal use at any dose given its thujone content and documented toxicity (convulsions, liver/kidney damage) - internal use recorded here is for historical reference only. External use (e.g. as an insect repellent) should avoid prolonged skin contact. Educational reference only, not a prescription; strictly avoid in pregnancy.
References
Lookalikes Review
Dangerous Lookalikes
Not documented
References & Sources
- Rezig, K., Benkaci-Ali, F., Foucaunier, M.L., Laurent, S. et al (2023) 'HPLC/ESI-MS Characterization of Phenolic Compounds from Cnicus benedictus L. Roots: A Study of Antioxidant, Antibacterial, Anti-Inflammatory, and Anti-Alzheimer's Activity', Chemistry & Biodiversity, 21(1), pp. e202300724. doi:10.1002/cbdv.202300724 Preclinical
https://doi.org/10.1002/cbdv.202300724 - Ahmadimoghaddam, D., Sadeghian, R., Ranjbar, A., Izadidastenaei, Z. and Mohammadi, S (2020) 'Antinociceptive activity of Cnicus benedictus L. leaf extract: a mechanistic evaluation', Research in Pharmaceutical Sciences, 15(5), pp. 463-472. doi:10.4103/1735-5362.297849 Preclinical
https://doi.org/10.4103/1735-5362.297849 - Zhang, J., Shen, S., Zhu, S., Jia, F. et al (2024) 'Cnicus benedictus extract-loaded electrospun gelatin wound dressing for treating diabetic wounds: An in vitro and in vivo study', Journal of Applied Biomaterials & Functional Materials, 22, pp. 22808000241245298. doi:10.1177/22808000241245298 Preclinical
https://doi.org/10.1177/22808000241245298 - Zietal, K., Mirowska-Guzel, D., Nowaczyk, A. and Blecharz-Klin, K (2024) 'Cnicus benedictus: Folk Medicinal Uses, Biological Activities, and In Silico Screening of Main Phytochemical Constituents', Planta Medica. doi:10.1055/a-2401-6049 Traditional / reference
https://doi.org/10.1055/a-2401-6049 - Jalil, D.M., Al-Mahdawi, T.T., Jameel, M.G. and Talal, M (2024) 'In Vitro Evaluate the Antiproliferative Impact of Cnicus Benedictus L. Leaves Methanolic Extract on Cervical Cancer', Asian Pacific Journal of Cancer Prevention, 25(10), pp. 3643-3649. doi:10.31557/APJCP.2024.25.10.3643 Preclinical
https://doi.org/10.31557/APJCP.2024.25.10.3643 - Peng, Y., Jian, Y., Zulfiqar, A., Li, B., Zhang, K., Long, F., Peng, C., Cai, X., Khan, I.A. and Wang, W (2017) 'Two new sesquiterpene lactone glycosides from Cnicus benedictus', Natural Product Research, 31(19), pp. 2211-2217. doi:10.1080/14786419.2017.1295239 Preclinical
https://doi.org/10.1080/14786419.2017.1295239 - Paun, G., Neagu, E., Moroeanu, V., Albu, C., Savin, S. and Lucian Radu, G (2019) 'Chemical and Bioactivity Evaluation of Cnicus benedictus and Eryngium planum Polyphenolic-Rich Extracts', BioMed Research International, 2019, pp. 3692605. doi:10.1155/2019/3692605 Preclinical
https://doi.org/10.1155/2019/3692605 - Gobrecht, P., Gebel, J., Leibinger, M., Zeitler, C., Chen, Z., Grundemann, D. and Fischer, D (2024) 'Cnicin promotes functional nerve regeneration', Phytomedicine, 129, pp. 155641. doi:10.1016/j.phymed.2024.155641 Preclinical
https://doi.org/10.1016/j.phymed.2024.155641 - Avula, B., Katragunta, K., Wang, Y.H., Ali, Z. and Khan, I.A (2022) 'Simultaneous determination and characterization of flavonoids, sesquiterpene lactone, and other phenolics from Centaurea benedicta and dietary supplements using UHPLC-PDA-MS and LC-DAD-QToF', Journal of Pharmaceutical and Biomedical Analysis, 216, pp. 114806. doi:10.1016/j.jpba.2022.114806 Preclinical
https://doi.org/10.1016/j.jpba.2022.114806 - Paun, G., Neagu, E., Albu, C. and Radu, G.L (2015) 'Inhibitory potential of some Romanian medicinal plants against enzymes linked to neurodegenerative diseases and their antioxidant activity', Pharmacognosy Magazine, 11(Suppl 1), pp. S110-S116. doi:10.4103/0973-1296.157709 Preclinical
https://doi.org/10.4103/0973-1296.157709 - Drugs.com (n.d.) 'Blessed Thistle Uses, Benefits & Dosage'. Available at: https://www.drugs.com/npp/blessed-thistle.html Traditional / reference
https://www.drugs.com/npp/blessed-thistle.html - Drugs and Lactation Database (LactMed) (2021) 'Blessed Thistle'. Available at: https://www.ncbi.nlm.nih.gov/books/NBK501775/ Traditional / reference
https://www.ncbi.nlm.nih.gov/books/NBK501775/
- Kowalonek, J., Stachowiak, N., Bolczak, K. and Richert, A (2023) 'Physicochemical and Antibacterial Properties of Alginate Films Containing Tansy (Tanacetum vulgare L.) Essential Oil', Polymers, 15(2), pp. 260. doi:10.3390/polym15020260 Preclinical
https://doi.org/10.3390/polym15020260 - Ak, G., Gevrenova, R., Sinan, K.I., Zengin, G. and others (2021) 'Tanacetum vulgare L. (Tansy) as an effective bioresource with promising pharmacological effects from natural arsenal', Food and Chemical Toxicology, 153, pp. 112268. doi:10.1016/j.fct.2021.112268 Preclinical
https://doi.org/10.1016/j.fct.2021.112268 - Paderin, N.M., Saveliev, Y.N. and Popov, S.V (2020) 'The effect of pectin of tansy, Tanacetum vulgare L., on anxiety and overeating food rich in fats and sugars in mice in modelling binge eating', Voprosy Pitaniia, 89(6), pp. 14-22. doi:10.24411/0042-8833-2020-10074 Preclinical
https://doi.org/10.24411/0042-8833-2020-10074 - Babich, O., Larina, V., Krol, O., Ulrikh, E. and others (2023) 'In Vitro Study of Biological Activity of Tanacetum vulgare Extracts', Pharmaceutics, 15(2), pp. 616. doi:10.3390/pharmaceutics15020616 Preclinical
https://doi.org/10.3390/pharmaceutics15020616 - Puk, K. and Guz, L (2021) 'Parasiticidal effects of Tanacetum vulgare extract against Ichthyophthirius multifiliis', Polish Journal of Veterinary Sciences, 24(1), pp. 159-161. doi:10.24425/pjvs.2021.136805 Preclinical
https://doi.org/10.24425/pjvs.2021.136805 - Roman, H., Niculescu, A.G., Lazar, V. and Mitache, M.M (2023) 'Antibacterial Efficiency of Tanacetum vulgare Essential Oil against ESKAPE Pathogens and Synergisms with Antibiotics', Antibiotics, 12(11), pp. 1635. doi:10.3390/antibiotics12111635 Preclinical
https://doi.org/10.3390/antibiotics12111635 - Sukele, R., Lauberte, L., Kovalcuka, L., Logviss, K. and others (2023) 'Chemical Profiling and Antioxidant Activity of Tanacetum vulgare L. Wild-Growing in Latvia', Plants, 12(10), pp. 1968. doi:10.3390/plants12101968 Preclinical
https://doi.org/10.3390/plants12101968 - Korpinen, R.I., Valimaa, A.L., Liimatainen, J. and Kunnas, S (2021) 'Essential Oils and Supercritical CO2 Extracts of Arctic Angelica, Marsh Labrador Tea and Common Tansy (Tanacetum vulgare)-Chemical Compositions and Antimicrobial Activities', Molecules, 26(23), pp. 7121. doi:10.3390/molecules26237121 Preclinical
https://doi.org/10.3390/molecules26237121 - Jovanovic, M. and Poljacki, M (2003) 'Compositae dermatitis', Medicinski Pregled, 56(1-2), pp. 43-49. doi:10.2298/mpns0302043j Meta-analysis / review
https://doi.org/10.2298/mpns0302043j - Rohloff, J., Mordal, R. and Dragland, S (2004) 'Chemotypical variation of tansy (Tanacetum vulgare L.) from 40 different locations in Norway', Journal of Agricultural and Food Chemistry, 52(6), pp. 1742-1748. doi:10.1021/jf0352430 Preclinical
https://doi.org/10.1021/jf0352430 - Grieve, M (1931) 'A Modern Herbal'. Traditional / reference
https://scholar.google.com/scholar?q=A%20Modern%20Herbal - Kivilaan, A. and Bandurski, R.S (1981) 'The 1879 Beal seed viability experiment', 68(9), pp. 1290--1292. Traditional / reference
https://scholar.google.com/scholar?q=The%201879%20Beal%20seed%20viability%20experiment - Orav, A., Raal, A. and Arak, E (2006) 'Essential oil composition of Tanacetum vulgare L', 20(12), pp. 1129--1142. Traditional / reference
https://scholar.google.com/scholar?q=Essential%20oil%20composition%20of%20Tanacetum%20vulgare%20L - 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 - Washington State Noxious Weed Control Board 'Tansy Ragwort (Senecio jacobaea)'. Available at: https://www.nwcb.wa.gov/weeds/tansy-ragwort Traditional / reference
https://www.nwcb.wa.gov/weeds/tansy-ragwort - Schneider, J. and Tsegaye, Y. and W/Tensae, M. and G/Selassie, S. and Haile, T. and Bane, A. and Ali, A. and Mesfin, G. and Seboxa, T (2012) 'Veno-occlusive liver disease: a case report', Ethiopian Medical Journal, 50 Suppl 2, pp. 47-51. Available at: https://pubmed.ncbi.nlm.nih.gov/22946295/ Clinical study
https://pubmed.ncbi.nlm.nih.gov/22946295/
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.