Plant Comparison
Sea buckthorn vs Flaxseed
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
Sea buckthorn and Flaxseed: they share 6 indicated uses (arthritis / joint pain, cancer (anticancer research), cardiovascular / heart health, …); 3 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Sea buckthorn | Flaxseed | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 1/10 | 3/10 | Stronger for Flaxseed |
| Cancer (anticancer research) | 2/10 | 7/10 | Stronger for Flaxseed |
| Cardiovascular / heart health | 7/10 | 6/10 | Comparable evidence |
| Inflammation (general) | 1/10 | 3/10 | Stronger for Flaxseed |
| Metabolic support | 1/10 | 6/10 | Stronger for Flaxseed |
| Skin irritation | 1/10 | 3/10 | Stronger for Flaxseed |
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
Sea buckthorn berries are among the richest natural sources of vitamin C, along with beta-carotene and other carotenoids.
A distinctive fatty-acid profile, particularly rich in palmitoleic acid (omega-7), the basis of the oil's skin- and mucous-membrane-healing reputation.
Antioxidant flavonoids contributing to the plant's anti-inflammatory activity.
Flax is the richest dietary source of SDG-type lignans, converted by gut bacteria to the mammalian lignans enterodiol and enterolactone; studied for antioxidant and hormone-modulating activity.
The dominant fatty acid of the seed oil (~50-55% of total oil), a plant-based omega-3 studied for cardiovascular and anti-inflammatory effects.
Concentrated in the seed coat; gives flaxseed its demulcent, laxative, bulk-forming action.
Present at low levels; cooking/roasting reduces them to negligible amounts in normal food use - a theoretical concern only at high raw intakes.
Pharmacological Actions
Traditional & Indicated Uses
inferred from anti-inflammatory action
inferred from antidiabetic action
inferred from anticancer action
inferred from immunomodulator action
inferred from anti-inflammatory action
inferred from antidiabetic action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from anticancer action
inferred from digestive action
inferred from anti-inflammatory action
Safety, Cautions & Contraindications
Berries and juice are safe as food. Seed oil is safe topically and orally in moderate amounts. May have mild anticoagulant effects. May lower blood pressure and blood sugar — use caution with medications. Allergic reactions are rare.
Duke (2002) rates sea buckthorn as +++ and notes antioxidant, hepatoprotective, antiulcer, and vulnerary activities at the experimental level (score 1). The berries are exceptionally rich in vitamins C (one of the highest natural sources) and E, carotenoids, flavonoids, and omega-7 fatty acids (palmitoleic acid). Duke recommends sea buckthorn as a 'food farmacy' — consumed as part of the regular diet for its nutritional-medicinal benefits. Its radioprotective properties have been studied, though without strong clinical validation. No significant safety concerns at food doses (Duke, 2002).
Flaxseeds are safe for most people at recommended food amounts (1–2 tablespoons ground/day). They must be ground or milled to be bioavailable — whole seeds largely pass through the gut undigested. High fibre content may cause bloating, flatulence, and loose stools, especially if fibre intake is increased rapidly without adequate hydration. Flaxseeds contain cyanogenic glycosides (linamarin, linustatin); cooking or roasting reduces these to negligible levels in normal food amounts. Raw seeds in very large quantities are a theoretical concern, but typical use is safe (EFSA, 2017).
Medication interactions: Flaxseed may reduce absorption of oral medications if taken simultaneously — space flaxseed supplementation 1–2 hours from medications. Omega-3 ALA and lignans may mildly enhance anticoagulant/antiplatelet effects; use caution with blood thinners. Some sources suggest caution with hormone-sensitive conditions due to phytoestrogen (lignan) content, though dietary amounts are unlikely to pose risk (Adolphe et al., 2010).
Pregnancy: Food amounts are generally considered safe; high-dose supplements should be discussed with a clinician due to limited safety data.
Duke (2002) rates flaxseed as +++ with clinical evidence (score 2) for antiatherogenic, hypocholesterolemic, laxative, lipolytic (fat-dissolving), and demulcent activities. Flaxseed's omega-3 fatty acids (ALA) and lignans are associated with reduced cardiovascular risk. Commission E approves flaxseed as a laxative and for mucilaginous protection of inflamed gastrointestinal mucosa. Dose: 1–2 tablespoons ground seed with ample water, twice daily. Whole seeds should be chewed or ground for full medicinal effect. Cyanogenic glycosides are present but at safe levels in normal dietary amounts (Duke, 2002).
External Ids
Botanical Description
Thorny, deciduous shrub or small tree with narrow, silvery-grey, willow-like leaves. The plant is dioecious (separate male and female plants); female plants bear dense clusters of small, bright orange-yellow berries tightly packed along the branches, giving a striking display in autumn.[4]
Erect annual herb, slender and often branched near the top, growing 30-80 (up to 100) cm tall from a fine taproot. Leaves are alternate, sessile, narrowly lanceolate to linear, blue-green and entire-margined. Flowers are pale blue (occasionally white or pink), five-petalled and borne on slender stalks in loose terminal cymes. The fruit is a small globular capsule ('boll') that splits into ten compartments, each containing one flattened, glossy, red-brown seed.[5]
Habitat
Grows on coastal dunes, riverbanks and disturbed, nutrient-poor or sandy soils; native across temperate Europe and Asia, tolerant of harsh, exposed conditions and cold climates, notably widespread in the Himalayan and Tibetan plateau region.[4]
Native to the Mediterranean region and the Fertile Crescent, cultivated since prehistory for fibre and oil and now grown worldwide in temperate regions with well-drained, fertile soils and a cool, moist growing season; occasionally found as a naturalised escape on waste and cultivated ground.[5]
Harvesting
Berries are hand-picked (often by cutting whole fruiting branches, given the thorns and fragile fruit) in late summer to autumn once ripe; leaves are picked through the growing season, and seeds are separated from pressed fruit for seed oil.[4]
Grown as an annual crop, seed is harvested once the capsules ('bolls') have dried and turned brown, typically in late summer, by cutting or combining the whole plant and threshing out the seed. Whole seed stores well; it should only be ground shortly before use, since the oil in ground seed oxidises and turns rancid quickly.[2]
Traditional Uses
Sea buckthorn has a long Tibetan, Mongolian and traditional Chinese medicine history as a nutritive and healing tonic for respiratory, digestive and skin complaints, and the berries are exceptionally rich in vitamin C and carotenoids; the oil, from both fruit and seed, has a particular traditional and modern reputation for soothing and healing irritated or damaged skin and mucous membranes.[1, 4]
Flaxseed has a long history of traditional use as a bulk-forming laxative and demulcent for constipation and irritated gut mucosa, and as a poultice for boils and inflamed skin. Modern interest centres on its lignan (secoisolariciresinol diglucoside) and alpha-linolenic acid content, studied for cardiovascular, metabolic and hormone-related outcomes.[2, 4, 5]
Preparations
Cold-pressed oil from the berry pulp or seed, applied topically for skin healing or taken orally as a nutritional/antioxidant supplement.
Whole seed freshly ground (milled) and taken with plenty of liquid, or stirred into food; grinding is needed to make the oil and lignans bioavailable, as whole seeds largely pass through the gut undigested.
Cold-pressed oil taken as a concentrated source of alpha-linolenic acid (omega-3); lacks the fibre and lignan content of the whole ground seed.
References
Lookalikes Review
Dosage
Not documented
Traditional guidance and Duke (2002) suggest 1-2 tablespoons of ground seed with ample water, once or twice daily. Educational reference only, not a prescription.
A randomised placebo-controlled trial titrated flax oil capsules (550 mg alpha-linolenic acid per 1 g of oil) to 12 capsules per day, i.e. up to roughly 12 g of oil daily, over 16 weeks - broadly matching the 1-2 tablespoons (about 10-15 mL) daily often cited for omega-3 intake. That trial was in children and adolescents with bipolar disorder and its primary outcomes were null; it is cited here only as a source for an administered human dose of the oil, not as evidence of benefit. Note the EU herbal monograph on Lini semen covers the SEED, not the oil. Educational reference only, not a prescription.
References & Sources
- Liu, L., Wen, T., Xiao, Y., Chen, H. et al (2024) 'Sea buckthorn extract mitigates chronic obstructive pulmonary disease by suppression of ferroptosis via scavenging ROS and blocking p53/MAPK pathways', Journal of Ethnopharmacology, 336, pp. 118726. doi:10.1016/j.jep.2024.118726 Preclinical
https://doi.org/10.1016/j.jep.2024.118726 - Wen, P., Zhao, P., Qin, G., Tang, S. et al (2018) 'Genotoxicity and teratogenicity of seabuckthorn (Hippophae rhamnoides L.) berry oil', Drug and Chemical Toxicology, 43(4), pp. 391-397. doi:10.1080/01480545.2018.1497047 Preclinical
https://doi.org/10.1080/01480545.2018.1497047 - Gong, G., Guan, Y.Y., Zhang, Z.L., Rahman, K. et al (2020) 'Isorhamnetin: A review of pharmacological effects', Biomedicine & Pharmacotherapy, 128, pp. 110301. doi:10.1016/j.biopha.2020.110301 Traditional / reference
https://doi.org/10.1016/j.biopha.2020.110301 - Suryakumar, G. and Gupta, A (2011) 'Medicinal and therapeutic potential of Sea buckthorn (Hippophae rhamnoides L.)', Journal of Ethnopharmacology, 138(2), pp. 268-278. doi:10.1016/j.jep.2011.09.024 Meta-analysis / review
https://doi.org/10.1016/j.jep.2011.09.024 - Pundir, S., Garg, P., Dviwedi, A., Ali, A., Kapoor, V.K., Kapoor, D., Kulshrestha, S., Lal, U.R. and Negi, P (2021) 'Ethnomedicinal uses, phytochemistry and dermatological effects of Hippophae rhamnoides L.: a review', Journal of Ethnopharmacology, 266, pp. 113434. doi:10.1016/j.jep.2020.113434 Meta-analysis / review
https://doi.org/10.1016/j.jep.2020.113434 - Chen, Y., He, W., Cao, H., Wang, Z., Liu, J., Wang, B. and Wang, C (2024) 'Research progress of sea buckthorn (Hippophae rhamnoides) in prevention and treatment of cardiovascular disease', Frontiers in Cardiovascular Medicine, 11, pp. 1477636. doi:10.3389/fcvm.2024.1477636 Meta-analysis / review
https://doi.org/10.3389/fcvm.2024.1477636 - Ganju, L., Padwad, Y., Singh, R., Karan, D., Chanda, S., Chopra, M.K., Bhatnagar, P., Kashyap, R. and Sawhney, R.C (2005) 'Anti-inflammatory activity of seabuckthorn (Hippophae rhamnoides) leaves', International Immunopharmacology, 5(12), pp. 1675-1684. doi:10.1016/j.intimp.2005.03.017 Preclinical
https://doi.org/10.1016/j.intimp.2005.03.017 - Yasukawa, K., Kitanaka, S., Kawata, K. and Goto, K (2009) 'Anti-tumor promoters phenolics and triterpenoid from Hippophae rhamnoides', Fitoterapia, 80(3), pp. 164-167. doi:10.1016/j.fitote.2009.01.006 Preclinical
https://doi.org/10.1016/j.fitote.2009.01.006 - Zhu, Y., Wu, M., Li, X., Wang, Y., Li, M. and Zhou, H (2023) 'Flash extraction, characterization, and immunoenhancement activity of polysaccharide from Hippophae rhamnoides Linn', Chemistry & Biodiversity, 20(3), pp. e202200776. doi:10.1002/cbdv.202200776 Preclinical
https://doi.org/10.1002/cbdv.202200776 - Zuchowski, J (2023) 'Phytochemistry and pharmacology of sea buckthorn (Elaeagnus rhamnoides; syn. Hippophae rhamnoides): progress from 2010 to 2021', Phytochemistry Reviews, 22(1), pp. 3-33. doi:10.1007/s11101-022-09832-1 Meta-analysis / review
https://doi.org/10.1007/s11101-022-09832-1 - Ciesarova, Z., Murkovic, M., Cejpek, K., Kreps, F., Tobolkova, B., Koplik, R., Belajova, E., Kukurova, K., Dasko, L., Panovska, Z., Revenco, D. and Burcova, Z (2020) 'Why is sea buckthorn (Hippophae rhamnoides L.) so exceptional? A review', Food Research International, 133, pp. 109170. doi:10.1016/j.foodres.2020.109170 Meta-analysis / review
https://doi.org/10.1016/j.foodres.2020.109170 - Ma, X., Yang, W., Kallio, H. and Yang, B (2022) 'Health promoting properties and sensory characteristics of phytochemicals in berries and leaves of sea buckthorn (Hippophae rhamnoides)', Critical Reviews in Food Science and Nutrition, 62(14), pp. 3798-3816. doi:10.1080/10408398.2020.1869921 Meta-analysis / review
https://doi.org/10.1080/10408398.2020.1869921 - Dvorska, D., Sebova, D., Kajo, K., Kapinova, A., Svajdlenka, E., Goga, M., Frenak, R., Treml, J., Mersakova, S., Strnadel, J., Mazurakova, A., Baranova, I., Halasova, E., Brozmanova, M., Biringer, K., Kassayova, M., Dankova, Z., Smejkal, K., Hornak, S., Mojzis, J., Sadlonova, V., Brany, D., Kello, M. and Kubatka, P (2025) 'Chemopreventive and therapeutic effects of Hippophae rhamnoides L. fruit peels evaluated in preclinical models of breast carcinoma', Frontiers in Pharmacology, 16, pp. 1561436. doi:10.3389/fphar.2025.1561436 Preclinical
https://doi.org/10.3389/fphar.2025.1561436 - Ling, N., Tian, H., Wang, Q., Gao, M., Xu, G., Sun, Y., Song, D., Li, W. and Ji, C (2024) 'Advance in Hippophae rhamnoides polysaccharides: extraction, structural characteristics, pharmacological activity, structure-activity relationship and application', International Journal of Biological Macromolecules, 270, pp. 132420. doi:10.1016/j.ijbiomac.2024.132420 Meta-analysis / review
https://doi.org/10.1016/j.ijbiomac.2024.132420 - Chodak, A (2014) 'Sea buckthorn — values and medicinal properties', 21(1), pp. 72--75. Traditional / reference
https://scholar.google.com/scholar?q=Sea%20buckthorn%20%E2%80%94%20values%20and%20medicinal%20properties - Rousi, A (1971) 'The genus Hippophae L.: a taxonomic study', 8(3), pp. 177--227. Traditional / reference
https://scholar.google.com/scholar?q=The%20genus%20Hippophae%20L.%3A%20a%20taxonomic%20study - Zuñiga-López, M.C. et al (2021) 'Sea buckthorn (Hippophae rhamnoides L.) polysaccharides', 26(19). Traditional / reference
https://scholar.google.com/scholar?q=Sea%20buckthorn%20%28Hippophae%20rhamnoides%20L.%29%20polysaccharides - 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
- Picur, B., Cebrat, M., Zabrocki, J. and Siemion, I.Z (2006) 'Cyclopeptides of Linum usitatissimum', Journal of Peptide Science, 12(9), pp. 569-574. doi:10.1002/psc.779 Preclinical
https://doi.org/10.1002/psc.779 - Basch, E., Bent, S., Collins, J., Dacey, C., Hammerness, P., Harrison, M., Smith, M., Szapary, P., Ulbricht, C., Vora, M. and Weissner, W (2007) 'Flax and flaxseed oil (Linum usitatissimum): a review by the Natural Standard Research Collaboration', Journal of the Society for Integrative Oncology, 5(3), pp. 92-105. doi:10.2310/7200.2007.005 Meta-analysis / review
https://doi.org/10.2310/7200.2007.005 - Chhillar, H., Chopra, P. and Ashfaq, M.A (2020) 'Lignans from linseed (Linum usitatissimum L.) and its allied species: retrospect, introspect and prospect', Critical Reviews in Food Science and Nutrition, 61(16), pp. 2719-2741. doi:10.1080/10408398.2020.1784840 Meta-analysis / review
https://doi.org/10.1080/10408398.2020.1784840 - Ansari, R., Zarshenas, M.M. and Dadbakhsh, A.H (2019) 'A review on pharmacological and clinical aspects of Linum usitatissimum L', Current Drug Discovery Technologies, 16(2), pp. 148-158. doi:10.2174/1570163815666180521101136 Meta-analysis / review
https://doi.org/10.2174/1570163815666180521101136 - Akter, Y., Junaid, M., Afrose, S.S., Nahrin, A., Alam, M.S., Sharmin, T., Akter, R. and Hosen, S.M.Z (2021) 'A comprehensive review on Linum usitatissimum medicinal plant: its phytochemistry, pharmacology, and ethnomedicinal uses', Mini Reviews in Medicinal Chemistry, 21(18), pp. 2801-2834. doi:10.2174/1389557521666210203153436 Meta-analysis / review
https://doi.org/10.2174/1389557521666210203153436 - Musazadeh, V., Abolghasemian, M., Kavyani, Z., Moridpour, A.H., Nazari, A. and Faghfouri, A.H (2024) 'The effects of flaxseed (Linum usitatissimum) supplementation on anthropometric indices: an updated systematic review and meta-analysis of randomized clinical trials', Complementary Therapies in Medicine, 84, pp. 103066. doi:10.1016/j.ctim.2024.103066 Meta-analysis / review
https://doi.org/10.1016/j.ctim.2024.103066 - Mueed, A., Shibli, S., Jahangir, M., Jabbar, S. and Deng, Z (2022) 'A comprehensive review of flaxseed (Linum usitatissimum L.): health-affecting compounds, mechanism of toxicity, detoxification, anticancer and potential risk', Critical Reviews in Food Science and Nutrition, 63(32), pp. 11081-11104. doi:10.1080/10408398.2022.2092718 Meta-analysis / review
https://doi.org/10.1080/10408398.2022.2092718 - Kaithwas, G., Mukherjee, A., Chaurasia, A.K. and Majumdar, D.K (2011) 'Anti-inflammatory, analgesic and antipyretic activities of Linum usitatissimum L. (flaxseed/linseed) fixed oil', Indian Journal of Experimental Biology, 49(12), pp. 932-938. Preclinical
https://scholar.google.com/scholar?q=Anti-inflammatory%2C%20analgesic%20and%20antipyretic%20activities%20of%20Linum%20usitatissimum%20L.%20%28flaxseed/linseed%29%20fixed%20oil - Rafieian-Kopaei, M., Shakiba, A., Sedighi, M. and Bahmani, M (2017) 'The analgesic and anti-inflammatory activity of Linum usitatissimum in Balb/c mice', Journal of Evidence-Based Complementary & Alternative Medicine, 22(4), pp. 892-896. doi:10.1177/2156587217717416 Preclinical
https://doi.org/10.1177/2156587217717416 - Sirotkin, A.V (2023) 'Influence of flaxseed (Linum usitatissimum) on female reproduction', Planta Medica, 89(6), pp. 608-615. doi:10.1055/a-2013-2966 Meta-analysis / review
https://doi.org/10.1055/a-2013-2966 - Thompson, L.U., Chen, J.M., Li, T., Strasser-Weippl, K. and Goss, P.E (2006) 'Dietary flaxseed alters tumor biological markers in postmenopausal breast cancer', 11(10), pp. 3828--3835. doi:10.1158/1078-0432.CCR-04-2326 Randomized trial
https://doi.org/10.1158/1078-0432.CCR-04-2326 - Adolphe, J.L., Whiting, S.J., Juurlink, B.H.J., Thorpe, L.U. and Alcorn, J (2010) 'Health effects with consumption of the flax lignan secoisolariciresinol diglucoside', 103(7), pp. 929--938. doi:10.1017/S0007114509992753 Clinical study
https://doi.org/10.1017/S0007114509992753 - Caligiuri, S.P.B., Edel, A.L., Aliani, M. and Pierce, G.N (2014) 'Flaxseed for hypertension: implications for improved cardiovascular risk', 16(12), pp. 499. doi:10.1007/s11906-014-0499-8 Randomized trial
https://doi.org/10.1007/s11906-014-0499-8 - European Food Safety Authority (2017) 'Safety of cyanogenic glycosides from flaxseed consumed as part of a usual diet', 15(11). doi:10.2903/j.efsa.2017.5026 Preclinical
https://doi.org/10.2903/j.efsa.2017.5026 - Harris, W.S (2012) 'Stearidonic acid as a surrogate for eicosapentaenoic acid in cardiovascular risk reduction: update and recommendation', 70(10), pp. 565--574. Traditional / reference
https://scholar.google.com/scholar?q=Stearidonic%20acid%20as%20a%20surrogate%20for%20eicosapentaenoic%20acid%20in%20cardiovascular%20risk%20reduction%3A%20update%20and%20recommendation - Latvijas valsts mežzinātnes institūts (n.d.) 'Linsēkla Latvijā'. Available at: https://www.silava.lv Traditional / reference
https://www.silava.lv - Pan, A., Sun, J., Chen, Y. et al (2009) 'Effects of a flaxseed-derived lignan supplement in type 2 diabetic patients: a randomized, double-blind, cross-over trial', 4(11). doi:10.1371/journal.pone.0007654 Randomized trial
https://doi.org/10.1371/journal.pone.0007654 - Royal Botanic Gardens, Kew (n.d.) 'Linum usitatissimum L'. Available at: https://powo.science.kew.org/taxon/urn:lsid:http://ipni.org:names:381313-1 Traditional / reference
https://powo.science.kew.org/taxon/urn:lsid:http://ipni.org:names:381313-1 - Gracious, B.L., Chirieac, M.C., Costescu, S., Finucane, T.L., Youngstrom, E.A. and Hibbeln, J.R (2010) 'Randomized, placebo-controlled trial of flax oil in pediatric bipolar disorder', Bipolar Disorders, 12(2), pp. 142-154. doi:10.1111/j.1399-5618.2010.00799.x Randomized trial
https://doi.org/10.1111/j.1399-5618.2010.00799.x - 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.