Plant Comparison
Mallow vs Common Comfrey
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
Mallow and Common Comfrey: they share 8 indicated uses (arthritis / joint pain, back pain, bruising, …); 3 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Mallow | Common Comfrey | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 1/10 | 5/10 | Stronger for Common Comfrey |
| Back pain | 1/10 | 5/10 | Stronger for Common Comfrey |
| Bruising | 1/10 | 8/10 | Stronger for Common Comfrey |
| Headache | 1/10 | 5/10 | Stronger for Common Comfrey |
| Inflammation (general) | 2/10 | 5/10 | Stronger for Common Comfrey |
| Pain (general) | 5/10 | 8/10 | Stronger for Common Comfrey |
| Skin irritation | 2/10 | 5/10 | Stronger for Common Comfrey |
| Wounds | 5/10 | 5/10 | 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
The high mucilage content gives the demulcent, soothing action.
The blue-purple pigments and antioxidant constituents.
Phenolic constituents associated with antioxidant and reported antiproliferative (anticancer) activity in cell studies.
The key cell-proliferative constituent underlying comfrey's wound-healing reputation.
Contribute to the soothing, demulcent texture of the leaf and root.
Contribute to antioxidant and anti-inflammatory activity.
Hepatotoxic constituents naturally present in the whole plant; the reason internal use is not recommended and processed/detoxified extracts are used for research.
Pharmacological Actions
Anti-inflammatory, analgesic and wound-healing (preclinical)
Antibacterial / antimicrobial (methanolic leaf extracts; the naphthoquinone Malvone A)
Demulcent for irritation of the mouth or throat and associated dry cough (soothing mucilage); Mild laxative for occasional constipation (mucilage; traditional)
Mild laxative for occasional constipation (mucilage; traditional)
Traditional & Indicated Uses
inferred from anti-inflammatory action
inferred from anticancer action
Mild laxative for occasional constipation (mucilage; traditional)
Demulcent for irritation of the mouth or throat and associated dry cough (soothing mucilage)
inferred from antimicrobial action
inferred from anti-inflammatory action
inferred from analgesic action
Soothes irritated and inflamed skin and mucous membranes
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from anti-oedematous action
Safety, Cautions & Contraindications
Generally very well tolerated. Irritation of the mouth/throat or a cough that persists beyond about a week, or is accompanied by fever or breathlessness, needs medical assessment.
Use in pregnancy and breastfeeding is not recommended in the absence of adequate data.
Big headline: Comfrey naturally contains pyrrolizidine alkaloids (PAs), which can seriously harm the liver if taken internally (Staiger, 2012; EMA, 2015). • Do not ingest comfrey (no teas, no internal tinctures, no capsules), because PA exposure from internal use is the main safety problem (Staiger, 2012; Bach et al., 1990). • Topical use only, short-term: EU herbal guidance describes comfrey root preparations for minor bruises and sprains in adults, and recommends limited duration (commonly up to about 10 days) (EMA, 2015; EMA/HMPC, 2024). • Do not apply to broken skin (open wounds, damaged/irritated skin) and avoid eyes/mucous membranes (EMA/HMPC, 2024). • Pregnancy & breastfeeding: best avoided (not enough safety margin for medicinal use) (EMA/HMPC, 2024). • Children/adolescents: not recommended for medicinal topical use in EU monograph context (EMA/HMPC, 2024). • If you have liver disease or take medicines that stress the liver, skip comfrey completely (risk management logic based on PA concern) (Staiger, 2012; EMA, 2015). • Skin reactions: mild rash/irritation can occur; stop if it irritates (Smith and Jacobson, 2011).
Duke (2002) classifies common comfrey (Symphytum officinale) with anti-inflammatory and wound-healing properties, supported by allantoin content (promotes cell proliferation). However, comfrey also contains hepatotoxic pyrrolizidine alkaloids. Internal use is no longer recommended, and Commission E approved only external use. Duke emphasizes that pyrrolizidine alkaloids are cumulative hepatotoxins associated with veno-occlusive disease, and prolonged or internal use is contraindicated (Duke, 2002).
External Ids
Botanical Description
Biennial or short-lived perennial herb, 30-120 cm tall, with erect or sprawling, branched, often reddish stems. Leaves are alternate, long-stalked and palmately lobed with 5-7 shallow rounded lobes and toothed margins. Flowers are pink-purple with darker veining, with five notch-tipped petals borne in small axillary clusters. The fruit is a flattened, disc-shaped schizocarp ('cheese') that splits into a ring of small single-seeded nutlets.[2]
Robust, hairy perennial herb (Boraginaceae), 60-120 cm tall, with a thick, black-skinned, mucilaginous taproot. Leaves are large, broad, lance-shaped and bristly-hairy, running down the stem as raised wings (decurrent) - the leaf base's smooth, untoothed margin is a key feature distinguishing it from toxic foxglove. Drooping clusters of tubular, bell-shaped flowers are cream, pink or purple depending on variety.[11]
Habitat
Common on roadsides, waste ground, hedgebanks and field margins across Europe, North Africa and temperate Asia, and widely naturalised elsewhere; tolerates a wide range of soils, favouring sunny, disturbed, nitrogen-rich sites.[2]
Native to Europe and western Asia, growing in damp ground - riverbanks, ditches, damp meadows and waste ground - and widely cultivated.[11]
Harvesting
Leaves and flowers are gathered during the flowering period (summer) and dried quickly out of direct sun to preserve their mucilage content; fresh material can also be used directly for infusions or poultices.[11]
Leaves are cut during the growing season (before flowering is often preferred for lower pyrrolizidine-alkaloid content); root is dug in autumn or spring from mature plants.[11]
Traditional Uses
Mallow leaf and flower have a long ethnobotanical history across Europe as a demulcent for irritated mucous membranes - soothing coughs, sore throat and mouth irritation - and for occasional constipation and skin irritation, reflecting the mucilage-rich leaf and flower. Modern phytochemical and pharmacological work confirms antioxidant, anti-inflammatory, antimicrobial and wound-healing activity of its extracts.[2, 11]
Comfrey has one of the strongest traditional reputations of any European herb for wound healing and bone/tissue repair - the folk names 'knitbone' and 'boneset' reflect this - owing to its high allantoin content, which stimulates cell proliferation. Because the plant also contains hepatotoxic pyrrolizidine alkaloids, modern regulatory use is restricted to topical preparations only, for minor bruises and sprains, and internal use (teas, tinctures) is no longer recommended.[11]
Preparations
The officially recognised European herbal-monograph preparation, for minor bruises and sprains, short-term use only.
Dosage
EMA herbal-monograph guidance suggests roughly 1.5-2 g of dried leaf or flower per cup, taken as an infusion up to 3 times daily. Educational reference only, not a prescription.
EU herbal-monograph guidance describes comfrey root preparations applied topically for minor bruises and sprains in adults, for a limited duration (commonly up to about 10 days); do not apply to broken skin or near eyes/mucous membranes. Comfrey must never be taken internally (no teas, tinctures or capsules) because of its pyrrolizidine alkaloid content. Educational reference only, not a prescription.
References
Lookalikes Review
Dangerous Lookalikes
Not documented
References & Sources
- Mousavi, S.M., Hashemi, S.A., Behbudi, G., Mazraedoost, S. and others (2021) 'A Review on Health Benefits of Malva sylvestris L. Nutritional Compounds for Metabolites, Antioxidants, and Anti-Inflammatory, Anticancer, and Antimicrobial Applications', Evidence-Based Complementary and Alternative Medicine, 2021, pp. 5548404. doi:10.1155/2021/5548404 Meta-analysis / review
https://doi.org/10.1155/2021/5548404 - Gasparetto, J.C., Martins, C.A., Hayashi, S.S., Otuky, M.F. and others (2012) 'Ethnobotanical and scientific aspects of Malva sylvestris L.: a millennial herbal medicine', Journal of Pharmacy and Pharmacology, 64(2), pp. 172-189. doi:10.1111/j.2042-7158.2011.01383.x Meta-analysis / review
https://doi.org/10.1111/j.2042-7158.2011.01383.x - Wu, Y., Qiu, A., Yang, Z., Wu, J. and others (2019) 'Malva sylvestris extract alleviates the astrogliosis and inflammatory stress in LPS-induced depression mice', Journal of Neuroimmunology, 336, pp. 577029. doi:10.1016/j.jneuroim.2019.577029 Preclinical
https://doi.org/10.1016/j.jneuroim.2019.577029 - Ben Saad, A., Rjeibi, I., Brahmi, D., Smida, A. and others (2016) 'Malva sylvestris extract protects upon lithium carbonate-induced kidney damages in male rat', Biomedicine & Pharmacotherapy, 84, pp. 1099-1107. doi:10.1016/j.biopha.2016.10.026 Preclinical
https://doi.org/10.1016/j.biopha.2016.10.026 - Zuo, H., Li, Y., Cui, Y. and An, Y (2017) 'Cardioprotective effect of Malva sylvestris L. in myocardial ischemic/reperfused rats', Biomedicine & Pharmacotherapy, 95, pp. 679-684. doi:10.1016/j.biopha.2017.08.111 Preclinical
https://doi.org/10.1016/j.biopha.2017.08.111 - Benso, B., Rosalen, P.L., Alencar, S.M. and Murata, R.M (2015) 'Malva sylvestris Inhibits Inflammatory Response in Oral Human Cells. An In Vitro Infection Model', PLoS One, 10(10), pp. e0140331. doi:10.1371/journal.pone.0140331 Preclinical
https://doi.org/10.1371/journal.pone.0140331 - Prudente, A.S., Sponchiado, G., Mendes, D.A.G.B., Soley, B.S. and others (2017) 'Pre-clinical efficacy assessment of Malva sylvestris on chronic skin inflammation', Biomedicine & Pharmacotherapy, 93, pp. 852-860. doi:10.1016/j.biopha.2017.06.083 Preclinical
https://doi.org/10.1016/j.biopha.2017.06.083 - Mohaghegh, Z., Golfakhrabadi, F., Faal Siahkal, S., Dastoorpoor, M. and others (2022) 'The Effect of Malva sylvestris Cream on Episiotomy Pain and Healing: A Randomized Controlled Clinical Trial', International Journal of Community Based Nursing and Midwifery, 10(4), pp. 248-258. doi:10.30476/IJCBNM.2022.95772.2082 Randomized trial
https://doi.org/10.30476/IJCBNM.2022.95772.2082 - Areesanan, A., Nicolay, S., Keller, M., Zimmermann-Klemd, A.M. and others (2023) 'Potential benefits of Malva sylvestris in dry-eye disease pathology in vitro based on antioxidant, wound-healing and anti-inflammatory properties', Biomedicine & Pharmacotherapy, 168, pp. 115782. doi:10.1016/j.biopha.2023.115782 Preclinical
https://doi.org/10.1016/j.biopha.2023.115782 - Martins, C.A., Weffort-Santos, A.M., Gasparetto, J.C., Trindade, A.C. and others (2014) 'Malva sylvestris L. extract suppresses desferrioxamine-induced PGE2 and PGD2 release in differentiated U937 cells', Biomedical Chromatography, 28(7), pp. 986-993. doi:10.1002/bmc.3106 Preclinical
https://doi.org/10.1002/bmc.3106 - European Medicines Agency (HMPC) (n.d.) 'European Union herbal monograph on Malva sylvestris L., folium and flos (Malvae folium / Malvae sylvestris flos)'. Available at: https://www.ema.europa.eu/en/medicines/herbal/malvae-folium Traditional / reference
https://www.ema.europa.eu/en/medicines/herbal/malvae-folium - Paul, Z.A. and Malla, A.T. and Dar, M.A. and Masoodi, M.H (2024) 'Phytochemistry and Pharmacological Activity of Malva sylvestris L.: A Detailed Insight', Combinatorial Chemistry & High Throughput Screening, 27(16), pp. 2309--2322. doi:10.2174/0113862073269336231009110313 Traditional / reference
https://doi.org/10.2174/0113862073269336231009110313 - Batiha, G.E. and Tene, S.T. and Teibo, J.O. and Shaheen, H.M. and Oluwatoba, O.S. and Teibo, T.K.A. and Al-Kuraishy, H.M. and Al-Garbee, A.I. and Alexiou, A. and Papadakis, M (2022) 'The phytochemical profiling, pharmacological activities, and safety of Malva sylvestris: a review', Naunyn-Schmiedeberg's Archives of Pharmacology, 396(3), pp. 421--440. doi:10.1007/s00210-022-02329-w Traditional / reference
https://doi.org/10.1007/s00210-022-02329-w
- Syarifah, A.N., Suryadi, H., Hayun, H., Simamora, A. and others (2023) 'Detoxification of comfrey (Symphytum officinale L.) extract using natural deep eutectic solvent (NADES) and evaluation of its anti-inflammatory, antioxidant, and hepatoprotective properties', Frontiers in Pharmacology, 14, pp. 1012716. doi:10.3389/fphar.2023.1012716 Preclinical
https://doi.org/10.3389/fphar.2023.1012716 - Melnyk, N., Popowski, D., Strawa, J.W., Przygodzinska, K. and others (2023) 'Skin microbiota metabolism of natural products from comfrey root (Symphytum officinale L.)', Journal of Ethnopharmacology, 318(Pt B), pp. 116968. doi:10.1016/j.jep.2023.116968 Preclinical
https://doi.org/10.1016/j.jep.2023.116968 - Trifan, A., Skalicka-Wozniak, K., Granica, S., Czerwinska, M.E. and others (2020) 'Symphytum officinale L.: Liquid-liquid chromatography isolation of caffeic acid oligomers and evaluation of their influence on pro-inflammatory cytokine release in LPS-stimulated neutrophils', Journal of Ethnopharmacology, 262, pp. 113169. doi:10.1016/j.jep.2020.113169 Preclinical
https://doi.org/10.1016/j.jep.2020.113169 - Brown, A.W., Stegelmeier, B.L., Colegate, S.M., Gardner, D.R. and others (2016) 'The comparative toxicity of a reduced, crude comfrey (Symphytum officinale) alkaloid extract and the pure, comfrey-derived pyrrolizidine alkaloids, lycopsamine and intermedine in chicks (Gallus gallus domesticus)', Journal of Applied Toxicology, 36(5), pp. 716-725. doi:10.1002/jat.3205 Preclinical
https://doi.org/10.1002/jat.3205 - Trifan, A., Wolfram, E., Esslinger, N., Grubelnik, A. and others (2021) 'Globoidnan A, rabdosiin and globoidnan B as new phenolic markers in European-sourced comfrey (Symphytum officinale L.) root samples', Phytochemical Analysis, 32(4), pp. 482-494. doi:10.1002/pca.2996 Preclinical
https://doi.org/10.1002/pca.2996 - Nastic, N., Borras-Linares, I., Lozano-Sanchez, J., Svarc-Gajic, J. and others (2020) 'Comparative Assessment of Phytochemical Profiles of Comfrey (Symphytum officinale L.) Root Extracts Obtained by Different Extraction Techniques', Molecules, 25(4), pp. 837. doi:10.3390/molecules25040837 Preclinical
https://doi.org/10.3390/molecules25040837 - Frost, R., MacPherson, H. and O'Meara, S (2013) 'A critical scoping review of external uses of comfrey (Symphytum spp.)', Complementary Therapies in Medicine, 21(6), pp. 724-745. doi:10.1016/j.ctim.2013.09.009 Meta-analysis / review
https://doi.org/10.1016/j.ctim.2013.09.009 - Trifan, A., Opitz, S.E.W., Josuran, R., Grubelnik, A. and others (2018) 'Is comfrey root more than toxic pyrrolizidine alkaloids? Salvianolic acids among antioxidant polyphenols in comfrey (Symphytum officinale L.) roots', Food and Chemical Toxicology, 112, pp. 178-187. doi:10.1016/j.fct.2017.12.051 Preclinical
https://doi.org/10.1016/j.fct.2017.12.051 - Dey, D., Jingar, P., Agrawal, S., Shrivastava, V. and others (2019) 'Symphytum officinale augments osteogenesis in human bone marrow-derived mesenchymal stem cells in vitro as they differentiate into osteoblasts', Journal of Ethnopharmacology, 248, pp. 112329. doi:10.1016/j.jep.2019.112329 Preclinical
https://doi.org/10.1016/j.jep.2019.112329 - Kuchta, K. and Schmidt, M (2020) 'Safety of medicinal comfrey cream preparations (Symphytum officinale s.l.): The pyrrolizidine alkaloid lycopsamine is poorly absorbed through human skin', Regulatory Toxicology and Pharmacology, 118, pp. 104784. doi:10.1016/j.yrtph.2020.104784 Preclinical
https://doi.org/10.1016/j.yrtph.2020.104784 - European Medicines Agency (2011) 'European Union herbal monograph on Symphytum officinale L., radix'. Traditional / reference
https://scholar.google.com/scholar?q=European%20Union%20herbal%20monograph%20on%20Symphytum%20officinale%20L.%2C%20radix - Royal Botanic Gardens, Kew (n.d.). Available at: https://powo.science.kew.org Traditional / reference
https://powo.science.kew.org - Staiger, C (2012) 'Comfrey: a clinical overview', 26(10), pp. 1441--1448. doi:10.1002/ptr.4612 Randomized trial
https://doi.org/10.1002/ptr.4612 - 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 - Vithayathil, M.K. and Edwards, M (2016) 'Comfrey herbal remedy causing second-degree heart block: do not be outfoxed by digitalis', BMJ Case Reports, 2016, pp. bcr2016216995. doi:10.1136/bcr-2016-216995 Clinical study
https://doi.org/10.1136/bcr-2016-216995 - Lin, C.C. and Yang, C.C. and Phua, D.H. and Deng, J.F. and Lu, L.H (2010) 'An outbreak of foxglove leaf poisoning', Journal of the Chinese Medical Association, 73(2), pp. 97-100. doi:10.1016/S1726-4901(10)70009-5 Clinical study
https://doi.org/10.1016/S1726-4901(10)70009-5 - Woodland Trust (2024) 'Foxglove (Digitalis purpurea)'. Available at: https://www.woodlandtrust.org.uk/trees-woods-and-wildlife/plants/wild-flowers/foxglove/ Traditional / reference
https://www.woodlandtrust.org.uk/trees-woods-and-wildlife/plants/wild-flowers/foxglove/
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.