Omnia SanaPlant Comparison
Midland Hawthorn vs Japanese knotweed
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
Midland Hawthorn and Japanese knotweed: they share 4 indicated uses (arthritis / joint pain, cardiovascular / heart health, inflammation (general), …); 2 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Midland Hawthorn | Japanese knotweed | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 1/10 | 2/10 | Comparable evidence |
| Cardiovascular / heart health | 1/10 | 1/10 | Comparable evidence |
| Inflammation (general) | 1/10 | 7/10 | Stronger for Japanese knotweed |
| Skin irritation | 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
The principal cardioactive and antioxidant constituents, the basis for extract standardisation.
Additional antioxidant constituents of the flower, leaf and fruit.
Considered the principal bioactive constituents, responsible for much of the antioxidant, anti-inflammatory and cardioprotective activity attributed to this root.
Emodin has laxative and anti-inflammatory activity at typical concentrations but can cause gastrointestinal upset at high doses.
Pharmacological Actions
Traditional & Indicated Uses
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from sedative action
inferred from antispasmodic action
inferred from antispasmodic action
inferred from anti-inflammatory action
inferred from anticancer action
inferred from anti-inflammatory action
Safety, Cautions & Contraindications
Generally safe and well tolerated. High doses may cause low blood pressure and sedation. May interact with cardiac glycosides (digoxin) and antihypertensive drugs. Consult a physician before using with existing heart medications.
Duke (2002) rates hawthorn (Crataegus spp., including C. laevigata) as a triple-plus herb (+++) with Commission E approval (score 2-3) for decreasing cardiac output in functional Stage II heart insufficiency (NYHA). Clinical evidence supports hawthorn standardized extracts (80-500 mg, standardized to flavonoids or procyanidins) for angina, arrhythmia, atherosclerosis, and hypertension. Hawthorn may potentiate digitalis and other cardiac medications and is not considered suitable for self-medication without professional guidance (Duke, 2002).
Japanese knotweed root contains resveratrol and emodin; high doses of emodin may cause GI discomfort and have laxative effects. Not recommended during pregnancy (emodin has potential teratogenic effects in animal studies). May interact with anticoagulants and antiplatelet medications. Quality control of commercial preparations is important as invasive weed extracts vary significantly.
Duke (2002) rates Japanese knotweed (listed as Hu-Zhang, Fallopia japonica) as +++ and highlights its rich content of resveratrol and emodin. Experimental evidence (score 1) supports COX-2 inhibitory, antioxidant, anti-inflammatory, hepatoprotective, and lipid-lowering activities — largely attributed to resveratrol. Duke notes its use in traditional Chinese medicine for fractures, burns, abscesses, and gynecological conditions. No significant clinical trials were available at time of publication, but resveratrol's biological activity is well-documented in vitro (Duke, 2002).
External Ids
Botanical Description
Small deciduous tree or large shrub with thorny branches and glossy, shallowly lobed leaves (less deeply cut than common hawthorn). Clusters of small, five-petalled white (occasionally pink) flowers with a strong scent appear in spring, followed by small red berries (haws), each usually containing two seeds (nutlets).[1]
Vigorous, invasive rhizomatous perennial (Polygonaceae) with hollow, bamboo-like, jointed stems 1-3 m tall (occasionally taller), speckled reddish-purple. Leaves are broad, heart- to shovel-shaped with a flat base. Abundant sprays of small, creamy-white flowers appear in late summer, followed by small winged fruit.[6]
Habitat
Grows in woodland, woodland edges, hedgerows and scrub, typically on richer, damper soils than common hawthorn; native to western and central Europe.[1]
Native to East Asia (Japan, China, Korea), now a notorious invasive species across Europe and North America, growing in disturbed ground, riverbanks, roadsides and waste land, spreading aggressively via an extensive rhizome network.[6]
Harvesting
Flowers are picked as they open in spring, leaves are picked with the young flowering shoots, and the ripe red berries (haws) are gathered in autumn; all three parts are used, often combined, in hawthorn preparations.[1]
The rhizome/root, the main medicinal part, is dug in autumn or winter when resveratrol content is highest; young spring shoots (stems) are also edible and used. Strict containment is required when harvesting, given the plant's severe invasiveness.[6]
Traditional Uses
Hawthorn flower, leaf and berry have a long European tradition, and substantial modern clinical study, as a cardiovascular tonic - supporting heart function, mild circulatory complaints and calming nervous tension - reflected in its traditional use for 'heart strengthening' and its modern standing as a well-studied botanical for mild heart failure symptoms.[1]
Known as Hu Zhang in Traditional Chinese Medicine, Japanese knotweed root has a centuries-old use for inflammation, infections, jaundice and menstrual complaints. Modern interest centres on its resveratrol and emodin content, now studied (as Polygonum cuspidatum extract) for antioxidant, anti-inflammatory, cardioprotective and hepatoprotective activity, and more recently for supportive use in acute respiratory infections.[2, 3, 6]
Preparations
Leaf-and-flower extract standardised to flavonoid or oligomeric proanthocyanidin content, taken as tablets or capsules; the best-studied clinical form.
Dosage
The EU herbal monograph on Crataegus spp., folium cum flore gives dry extracts in divided daily doses of 240-900 mg (single dose 80-450 mg) or, for one quantified extract, 570-1750 mg daily (single dose 190-350 mg), in adults and elderly. If symptoms persist longer than 2 weeks a doctor should be consulted, and hawthorn is never used as a substitute for prescribed heart medication without medical supervision. Educational reference only, not a prescription.
The EU herbal monograph gives 1-2 g of the comminuted leaf and flower in 150 mL of boiling water as an infusion, up to 4 times daily (maximum 6 g daily), in adults and elderly. Educational reference only, not a prescription.
Duke (2002) and general phytotherapy guidance treat this as an experimentally supported herb without a single agreed clinical dose; commercial resveratrol-standardised extracts should be dosed per product labelling. Educational reference only, not a prescription; avoid in pregnancy.
References
Drug Class Interactions
Not documented
Lookalikes Review
References & Sources
- Fong, H.H.S. and Bauman, J.L (2002) 'Hawthorn', Journal of Cardiovascular Nursing, 16(4), pp. 1-8. doi:10.1097/00005082-200207000-00002 Traditional / reference
https://doi.org/10.1097/00005082-200207000-00002 - Orhan, I.E (2018) 'Phytochemical and Pharmacological Activity Profile of Crataegus oxyacantha L. (Hawthorn) - A Cardiotonic Herb', Current Medicinal Chemistry, 25(37), pp. 4854-4865. doi:10.2174/0929867323666160919095519 Traditional / reference
https://doi.org/10.2174/0929867323666160919095519 - Ahmadipour, B., Kalantar, M., Abaszadeh, S. and Hassanpour, H (2024) 'Antioxidant and antihyperlipidemic effects of hawthorn extract (Crataegus oxyacantha) in broiler chickens', Veterinary Medicine and Science, 10(3), pp. e1414. doi:10.1002/vms3.1414 Preclinical
https://doi.org/10.1002/vms3.1414 - Rigelsky, J.M. and Sweet, B.V (2002) 'Hawthorn: pharmacology and therapeutic uses', American Journal of Health-System Pharmacy, 59(5), pp. 417-422. doi:10.1093/ajhp/59.5.417 Meta-analysis / review
https://doi.org/10.1093/ajhp/59.5.417 - Saeedi, G., Jeivad, F., Goharbari, M., Gheshlaghi, G.H. and Sabzevari, O (2018) 'Ethanol Extract of Crataegus Oxyacantha L. Ameliorate Dietary Non-Alcoholic Fatty Liver Disease in Rat', Drug Research, 68(10), pp. 553-559. doi:10.1055/a-0579-7532 Preclinical
https://doi.org/10.1055/a-0579-7532 - Mecheri, A., Benabderrahmane, W., Amrani, A., Boubekri, N., Benayache, F., Benayache, S. and Zama, D (2019) 'Hepatoprotective Effects of Algerian Crataegus oxyacantha Leaves', Recent Patents on Food, Nutrition & Agriculture, 10(1), pp. 70-75. doi:10.2174/2212798410666180730095456 Preclinical
https://doi.org/10.2174/2212798410666180730095456 - Benabderrahmane, W., Lores, M., Benaissa, O., Lamas, J.P., de Miguel, T., Amrani, A., Benayache, F. and Benayache, S (2019) 'Polyphenolic content and bioactivities of Crataegus oxyacantha L. (Rosaceae)', Natural Product Research, 35(4), pp. 627-632. doi:10.1080/14786419.2019.1582044 Preclinical
https://doi.org/10.1080/14786419.2019.1582044 - Ali, M., Muhammad, S., Shah, M.R., Khan, A., Rashid, U., Farooq, U., Ullah, F., Sadiq, A., Ayaz, M., Ali, M., Ahmad, M. and Latif, A (2017) 'Neurologically Potent Molecules from Crataegus oxyacantha; Isolation, Anticholinesterase Inhibition, and Molecular Docking', Frontiers in Pharmacology, 8, pp. 327. doi:10.3389/fphar.2017.00327 Preclinical
https://doi.org/10.3389/fphar.2017.00327 - Cuevas-Duran, R.E., Medrano-Rodriguez, J.C., Sanchez-Aguilar, M., Soria-Castro, E., Rubio-Ruiz, M.E., Del Valle-Mondragon, L., Sanchez-Mendoza, A., Torres-Narvaez, J.C., Pastelin-Hernandez, G. and Ibarra-Lara, L (2017) 'Extracts of Crataegus oxyacantha and Rosmarinus officinalis Attenuate Ischemic Myocardial Damage by Decreasing Oxidative Stress and Regulating the Production of Cardiac Vasoactive Agents', International Journal of Molecular Sciences, 18(11), pp. 2412. doi:10.3390/ijms18112412 Preclinical
https://doi.org/10.3390/ijms18112412 - Alp, H., Soner, B.C., Baysal, T. and Sahin, A.S (2014) 'Protective effects of Hawthorn (Crataegus oxyacantha) extract against digoxin-induced arrhythmias in rats', Anatolian Journal of Cardiology, 15(12), pp. 970-975. doi:10.5152/akd.2014.5869 Preclinical
https://doi.org/10.5152/akd.2014.5869 - Rothfuss, M.A., Pascht, U. and Kissling, G (2001) 'Effect of long-term application of Crataegus oxyacantha on ischemia and reperfusion induced arrhythmias in rats', Arzneimittel-Forschung, 51(1), pp. 24-28. doi:10.1055/s-0031-1299998 Preclinical
https://doi.org/10.1055/s-0031-1299998 - Khan, A., Akram, M., Thiruvengadam, M., Daniyal, M., Zakki, S.A., Munir, N., Zainab, R., Heydari, M., Mosavat, S.H., Rebezov, M. and Shariati, M.A (2022) 'Anti-anxiety Properties of Selected Medicinal Plants', Current Pharmaceutical Biotechnology, 23(8), pp. 1041-1060. doi:10.2174/1389201022666210122125131 Meta-analysis / review
https://doi.org/10.2174/1389201022666210122125131 - Rastogi, S., Pandey, M.M. and Rawat, A.K.S (2015) 'Traditional herbs: a remedy for cardiovascular disorders', Phytomedicine, 23(11), pp. 1082-1089. doi:10.1016/j.phymed.2015.10.012 Meta-analysis / review
https://doi.org/10.1016/j.phymed.2015.10.012 - European Medicines Agency (2016) 'European Union herbal monograph on Crataegus spp., folium cum flore'. Traditional / reference
https://scholar.google.com/scholar?q=European%20Union%20herbal%20monograph%20on%20Crataegus%20spp.%2C%20folium%20cum%20flore - Hendel, N. and Hendel, M (2014) 'Hedgerow Medicine'. Traditional / reference
https://scholar.google.com/scholar?q=Hedgerow%20Medicine - Pittler, M.H., Guo, R. and Ernst, E (2008) 'Hawthorn extract for treating chronic heart failure'. Traditional / reference
https://scholar.google.com/scholar?q=Hawthorn%20extract%20for%20treating%20chronic%20heart%20failure - 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 - Tankanow, R., Tamer, H.R., Streetman, D.S., Smith, S.G., Welton, J.L., Annesley, T., Aaronson, K.D. and Bleske, B.E (2003) 'Interaction study between digoxin and a preparation of hawthorn (Crataegus oxyacantha)', Journal of Clinical Pharmacology, 43(6), pp. 637-642. doi:10.1177/0091270003253417 Randomized trial
https://doi.org/10.1177/0091270003253417 - Pittler, M.H., Guo, R. and Ernst, E (2008) 'Hawthorn extract for treating chronic heart failure', Cochrane Database of Systematic Reviews, 2008(1), pp. CD005312. doi:10.1002/14651858.CD005312.pub2 Meta-analysis / review
https://doi.org/10.1002/14651858.CD005312.pub2 - Pittler, M.H., Guo, R. and Ernst, E (2008) 'Hawthorn extract for treating chronic heart failure', Cochrane Database of Systematic Reviews, 2008(1), pp. CD005312. doi:10.1002/14651858.CD005312.pub2 Meta-analysis / review
https://doi.org/10.1002/14651858.CD005312.pub2 - Ghasemzadeh Rahbardar, M. and Hosseinzadeh, H (2024) 'Therapeutic potential of hypnotic herbal medicines: A comprehensive review', Phytotherapy Research, 38(6), pp. 3037-3059. doi:10.1002/ptr.8201 Meta-analysis / review
https://doi.org/10.1002/ptr.8201 - Block, K.I., Gyllenhaal, C. and Mead, M.N (2004) 'Safety and efficacy of herbal sedatives in cancer care', Integrative Cancer Therapies, 3(2), pp. 128-148. doi:10.1177/1534735404265003 Meta-analysis / review
https://doi.org/10.1177/1534735404265003
- Dong, X., Fu, J., Yin, X., Cao, S. and others (2016) 'Emodin: A Review of its Pharmacology, Toxicity and Pharmacokinetics', Phytotherapy Research, 30(8), pp. 1207-1218. doi:10.1002/ptr.5631 Traditional / reference
https://doi.org/10.1002/ptr.5631 - Wang, S., Yang, Y., Sun, L., Qiao, G. and others (2022) 'Reynoutria japonica Houtt for Acute Respiratory Tract Infections in Adults and Children: A Systematic Review', Frontiers in Pharmacology, 13, pp. 787032. doi:10.3389/fphar.2022.787032 Meta-analysis / review
https://doi.org/10.3389/fphar.2022.787032 - Ke, Y., Zhan, L., Lu, T., Zhou, C. and others (2023) 'Advances for pharmacological activities of Polygonum cuspidatum (Reynoutria japonica) - A review', Pharmaceutical Biology, 61(1), pp. 177-188. doi:10.1080/13880209.2022.2158349 Traditional / reference
https://doi.org/10.1080/13880209.2022.2158349 - Zhang, Q., Zhao, Y., Zhang, M., Zhang, Y. and others (2021) 'Bioactive amides from Reynoutria japonica', Journal of Asian Natural Products Research, 23(3), pp. 228-234. doi:10.1080/10286020.2021.1873298 Preclinical
https://doi.org/10.1080/10286020.2021.1873298 - Lai, Y., Zhou, C., Huang, P., Dong, Z. and others (2024) 'Polygonum cuspidatum polysaccharide: A review of its extraction and purification, structure analysis, and biological activity', Journal of Ethnopharmacology, 331, pp. 118079. doi:10.1016/j.jep.2024.118079 Traditional / reference
https://doi.org/10.1016/j.jep.2024.118079 - Peng, W., Qin, R., Li, X. and Zhou, H (2013) 'Botany, phytochemistry, pharmacology, and potential application of Polygonum cuspidatum Sieb. et Zucc.: a review', Journal of Ethnopharmacology, 148(3), pp. 729-745. doi:10.1016/j.jep.2013.05.007 Traditional / reference
https://doi.org/10.1016/j.jep.2013.05.007 - Wang, X., Liang, L., Yan, J., Li, Z. and others (2023) 'Citri Reticulatae Pericarpium-Reynoutria japonica Houtt. herb pair suppresses breast cancer liver metastasis by targeting ECM1-mediated cholesterol biosynthesis pathway', Phytomedicine, 116, pp. 154896. doi:10.1016/j.phymed.2023.154896 Preclinical
https://doi.org/10.1016/j.phymed.2023.154896 - Jiang, Y., Liu, Y., Zhang, X. and others (2020) 'New phenolic glycosides from Reynoutria japonica', Journal of Asian Natural Products Research, 22(1), pp. 17-23. doi:10.1080/10286020.2019.1646730 Preclinical
https://doi.org/10.1080/10286020.2019.1646730 - Liu, Y., Wang, J., Li, Q. and others (2024) 'The Possibility of Polygonum cuspidatum against Osteoarthritis based on Network Pharmacology', Current Computer-Aided Drug Design, 20(2), pp. 121-133. doi:10.2174/1573409919666230403114131 Preclinical
https://doi.org/10.2174/1573409919666230403114131 - Espinosa-Andrews, H., Morales-Hernandez, N., Garcia-Marquez, E. and others (2025) 'Physicochemical and rheological characteristics of commercial Greek-style yogurt enriched with Polygonum cuspidatum roots or the P. cuspidatum beta-cyclodextrin inclusion complex', Food Research International, 203, pp. 115854. doi:10.1016/j.foodres.2025.115854 Preclinical
https://doi.org/10.1016/j.foodres.2025.115854 - Burns, J., Yokota, T., Ashihara, H., Lean, M.E.J. and Crozier, A (2002) 'Plant foods and herbal sources of resveratrol', 50(11), pp. 3337--3340. doi:10.1021/jf0112973 Traditional / reference
https://doi.org/10.1021/jf0112973 - Royal Botanic Gardens, Kew (n.d.). Available at: https://powo.science.kew.org Traditional / reference
https://powo.science.kew.org - World Health Organization (2007) '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
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.