Omnia SanaPlant Comparison
White Dead Nettle 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
White Dead Nettle and Common Comfrey: they share 5 indicated uses (arthritis / joint pain, bruising, inflammation (general), …); 2 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | White Dead Nettle | Common Comfrey | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 2/10 | 5/10 | Stronger for Common Comfrey |
| Bruising | 1/10 | 8/10 | Stronger for Common Comfrey |
| Inflammation (general) | 2/10 | 5/10 | Stronger for Common Comfrey |
| Skin irritation | 2/10 | 5/10 | Stronger for Common Comfrey |
| Wounds | 1/10 | 5/10 | Stronger for Common Comfrey |
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
Verbascoside, tiliroside and quercetin/kaempferol 3-O-glucosides in the flowers.
Lamalbid, alboside A and B and caryoptoside; linked to antioxidant and anti-inflammatory activity.
Lamalbid, chlorogenic acid, verbascoside, rutin and tiliroside, richest in the flowering tops.
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
Astringent and anti-inflammatory infusion or tincture (flowering tops)
Astringent (catarrh, excessive menstrual or vaginal discharge); Astringent and anti-inflammatory infusion or tincture (flowering tops)
Traditional & Indicated Uses
inferred from anti-inflammatory action
Astringent (catarrh, excessive menstrual or vaginal discharge)
inferred from anti-inflammatory action
inferred from expectorant action
inferred from astringent action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from anti-oedematous action
Safety, Cautions & Contraindications
Generally regarded as safe in culinary amounts and at normal medicinal doses; unlike the stinging nettle it has no stinging hairs.
Medicinal use during pregnancy or breastfeeding should be approached cautiously, as for any traditional astringent.
Identify correctly before foraging (resembles stinging nettle before flowering and red dead-nettle); clinical evidence is limited, so it should not replace conventional treatment.
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
Perennial herb closely resembling stinging nettle in leaf shape but entirely without stinging hairs. Square stems bear opposite, toothed, heart-shaped leaves, and whorls of white, hooded, two-lipped flowers cluster in the upper leaf axils.[15]
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
Grows in hedgerows, waste ground, gardens and roadsides on nitrogen-rich soils; native to Europe and temperate Asia, widely naturalised elsewhere.
Native to Europe and western Asia, growing in damp ground - riverbanks, ditches, damp meadows and waste ground - and widely cultivated.[11]
Harvesting
The flowering tops are picked as they open, largely through spring to autumn given the long flowering season, and dried in a warm, shaded, airy place; the standardisation markers are richest in the flowering tops specifically.[15]
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
White dead-nettle flower has a long European folk history as an astringent remedy for catarrh and excessive menstrual or vaginal discharge, and topically as a vulnerary wash for minor wounds; the young leaves and shoots have also traditionally been eaten as a cooked spring pot-herb.
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]
References
Lookalikes Review
Preparations
Not documented
The officially recognised European herbal-monograph preparation, for minor bruises and sprains, short-term use only.
Dosage
Not documented
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.
Dangerous Lookalikes
Not documented
References & Sources
- Czerwinska, M.E., Swierczewska, A., Wozniak, M. and Kiss, A.K (2017) 'Bioassay-Guided Isolation of Iridoids and Phenylpropanoids from Aerial Parts of Lamium album and Their Anti-inflammatory Activity in Human Neutrophils', Planta Medica, 83(12-13), pp. 1011-1019. doi:10.1055/s-0043-107031 Preclinical
https://doi.org/10.1055/s-0043-107031 - Czerwinska, M.E., Swierczewska, A. and Granica, S (2018) 'Bioactive Constituents of Lamium album L. as Inhibitors of Cytokine Secretion in Human Neutrophils', Molecules, 23(11), pp. 2770. doi:10.3390/molecules23112770 Preclinical
https://doi.org/10.3390/molecules23112770 - Czerwinska, M.E., Kalinowska, E., Popowski, D. and Bazylko, A (2020) 'Lamalbid, Chlorogenic Acid, and Verbascoside as Tools for Standardization of Lamium album Flowers - Development and Validation of HPLC-DAD Method', Molecules, 25(7), pp. 1721. doi:10.3390/molecules25071721 Preclinical
https://doi.org/10.3390/molecules25071721 - Sulborska, A., Konarska, A., Matysik-Wozniak, A., Dmitruk, M., Weryszko-Chmielewska, E., Skalska-Kaminska, A. and Rejdak, R (2020) 'Phenolic Constituents of Lamium album L. subsp. album Flowers: Anatomical, Histochemical, and Phytochemical Study', Molecules, 25(24), pp. 6025. doi:10.3390/molecules25246025 Preclinical
https://doi.org/10.3390/molecules25246025 - Konarska, A., Weryszko-Chmielewska, E., Matysik-Wozniak, A., Sulborska, A., Polak, B., Dmitruk, M., Piotrowska-Weryszko, K., Stefanczyk, B. and Rejdak, R (2021) 'Histochemical and Phytochemical Analysis of Lamium album subsp. album L. Corolla: Essential Oil, Triterpenes, and Iridoids', Molecules, 26(14), pp. 4166. doi:10.3390/molecules26144166 Preclinical
https://doi.org/10.3390/molecules26144166 - Khanaki, K., Fekri, A., Abedinzade, M., Mohammadi, E. and Aghajanpour, F (2022) 'Potential anti-inflammatory effect of Lamium album extract through caspase-3 and cyclooxygenase-2 genes expression in a rat model of middle cerebral artery occlusion', Folia Medica, 64(2), pp. 275-282. doi:10.3897/folmed.64.e60562 Preclinical
https://doi.org/10.3897/folmed.64.e60562 - Bubueanu, C., Iuksel, R. and Panteli, M (2019) 'Haemostatic activity of butanolic extracts of Lamium album and Lamium purpureum aerial parts', Acta Pharmaceutica, 69(3), pp. 443-449. doi:10.2478/acph-2019-0026 Preclinical
https://doi.org/10.2478/acph-2019-0026 - Arefani, S., Mehran, S.M.M., Moladoust, H., Norasfard, M.R., Ghorbani, A. and Abedinzade, M (2018) 'Effects of standardized extracts of Lamium album and Urtica dioica on rat tracheal smooth muscle contraction', Journal of Pharmacopuncture, 21(2), pp. 70-75. doi:10.3831/KPI.2018.21.008 Preclinical
https://doi.org/10.3831/KPI.2018.21.008 - Zhang, H., Rothwangl, K., Mesecar, A.D., Sabahi, A., Rong, L. and Fong, H.H.S (2009) 'Lamiridosins, hepatitis C virus entry inhibitors from Lamium album', Journal of Natural Products, 72(12), pp. 2158-2162. doi:10.1021/np900549e Preclinical
https://doi.org/10.1021/np900549e - Chipeva, V.A., Petrova, D.C., Geneva, M.E., Dimitrova, M.A., Moncheva, P.A. and Kapchina-Toteva, V.M (2013) 'Antimicrobial activity of extracts from in vivo and in vitro propagated Lamium album L. plants', African Journal of Traditional, Complementary and Alternative Medicines, 10(6), pp. 559-562. doi:10.4314/ajtcam.v10i6.30 Preclinical
https://doi.org/10.4314/ajtcam.v10i6.30 - Paduch, R. and Wozniak, A (2015) 'The Effect of Lamium album Extract on Cultivated Human Corneal Epithelial Cells (10.014 pRSV-T)', Journal of Ophthalmic & Vision Research, 10(3), pp. 229-237. doi:10.4103/2008-322X.170349 Preclinical
https://doi.org/10.4103/2008-322X.170349 - Abedinzade, M., Rostampour, M., Mirzajani, E., Khalesi, Z.B., Pourmirzaee, T. and Khanaki, K (2019) 'Urtica Dioica and Lamium Album Decrease Glycogen Synthase Kinase-3 beta and Increase K-Ras in Diabetic Rats', Journal of Pharmacopuncture, 22(4), pp. 248-252. doi:10.3831/KPI.2019.22.033 Preclinical
https://doi.org/10.3831/KPI.2019.22.033 - Budzianowski, J. and Skrzypczak, L (1995) 'Phenylpropanoid esters from Lamium album flowers', 38(4), pp. 997--1001. doi:10.1016/0031-9422(94)00727-B Traditional / reference
https://doi.org/10.1016/0031-9422(94)00727-B - Damtoft, S (1992) 'Iridoid glucosides from Lamium album', 31(1), pp. 175--178. doi:10.1016/0031-9422(91)83030-O Traditional / reference
https://doi.org/10.1016/0031-9422(91)83030-O - Pietrzak, W. and Nowak, R (2020) 'Lamalbid, Chlorogenic Acid, and Verbascoside as Tools for Standardization of Lamium album Flowers - Development and Validation of HPLC-DAD Method', 25(8). doi:10.3390/molecules25081913 Preclinical
https://doi.org/10.3390/molecules25081913 - Grieve, M (1931). Available at: https://botanical.com/botanical/mgmh/n/netwhd11.html Traditional / reference
https://botanical.com/botanical/mgmh/n/netwhd11.html - Herbal Reality (n.d.) 'White Deadnettle (Lamium album): Benefits, Uses, Safety'. Available at: https://www.herbalreality.com/herb/white-deadnettle/ Traditional / reference
https://www.herbalreality.com/herb/white-deadnettle/ - Ask-Ayurveda (n.d.) 'Lamium album (White Dead-Nettle) in Ayurveda - Benefits, Uses, Medicinal Properties & Healing Applications'. Available at: https://ask-ayurveda.com/wiki/article/4805-lamium-album Traditional / reference
https://ask-ayurveda.com/wiki/article/4805-lamium-album - Francis-Baker, T (2021), pp. 48. Traditional / reference
https://scholar.google.com/scholar?q=Francis-Baker%2C%20T - First Nature (n.d.) 'Lamium album, White Dead-nettle: identification, distribution, habitat'. Available at: https://www.first-nature.com/flowers/lamium-album.php Traditional / reference
https://www.first-nature.com/flowers/lamium-album.php - Ballyrobert Gardens (n.d.) 'Lamium album'. Available at: https://www.ballyrobertgardens.com/products/lamium-album Traditional / reference
https://www.ballyrobertgardens.com/products/lamium-album - Botanical Society of Scotland (2022) 'Plant of the Week - 17 January 2022: the White Dead-nettle (Lamium album)'. Available at: https://botsocscot.wordpress.com/2022/01/16/plant-of-the-week-january-17th-2022-the-white-dead-nettle-lamium-album/ Traditional / reference
https://botsocscot.wordpress.com/2022/01/16/plant-of-the-week-january-17th-2022-the-white-dead-nettle-lamium-album/ - Gardeners' World (2024) 'World (2024)'. Available at: https://www.gardenersworld.com/plants/dead-nettles/ Traditional / reference
https://www.gardenersworld.com/plants/dead-nettles/ - Royal Botanic Gardens, Kew (n.d.) 'Lamium album L'. Available at: https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:448792-1 Traditional / reference
https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:448792-1 - Royal Horticultural Society (n.d.) 'Lamium album (white deadnettle)'. Available at: https://www.rhs.org.uk/plants/9810/lamium-album/details Traditional / reference
https://www.rhs.org.uk/plants/9810/lamium-album/details - The Wildlife Trusts (n.d.) 'White dead-nettle'. Available at: https://www.wildlifetrusts.org/wildlife-explorer/wildflowers/white-dead-nettle Traditional / reference
https://www.wildlifetrusts.org/wildlife-explorer/wildflowers/white-dead-nettle
- 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.