Omnia SanaPlant Comparison
Aloe Vera vs Willow Bark
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
Aloe Vera and Willow Bark: they share 6 indicated uses (arthritis / joint pain, back pain, headache, …); 2 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Aloe Vera | Willow Bark | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 1/10 | 7/10 | Stronger for Willow Bark |
| Back pain | 1/10 | 9/10 | Stronger for Willow Bark |
| Headache | 1/10 | 1/10 | Comparable evidence |
| Inflammation (general) | 1/10 | 8/10 | Stronger for Willow Bark |
| Pain (general) | 1/10 | 9/10 | Stronger for Willow Bark |
| Skin irritation | 1/10 | 8/10 | Stronger for Willow Bark |
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
Acemannan and other glucomannans are the principal gel polysaccharides, underlying the emollient and wound-healing effects.
Found mainly in the leaf latex (not the inner gel); responsible for the traditional laxative effect and requiring caution with prolonged use.
Minor bioactive enzymes, vitamins (including C and E) and minerals contribute to the antioxidant and skin-conditioning properties of the gel.
Metabolised in the body to salicylic acid - the 'natural aspirin' that gives the analgesic, anti-inflammatory and antipyretic effects.
Pharmacological Actions
Aloe vera and its anthraquinone aloe-emodin show dose-dependent antiproliferative and pro-apoptotic activity against multiple cancer types in vitro and in vivo (preclinical).
Analgesic and anti-inflammatory for low back pain (moderate evidence; dose-dependent, around 240 mg salicin/day) - in an RCT, 240 mg salicin/day left 39% pain-free vs 6% on placebo within 4 weeks
Analgesic and anti-inflammatory for low back pain (moderate evidence; dose-dependent, around 240 mg salicin/day) - in an RCT, 240 mg salicin/day left 39% pain-free vs 6% on placebo within 4 weeks
Antipyretic (reduces fever)
Traditional & Indicated Uses
inferred from anti-inflammatory action
inferred from analgesic action
inferred from vulnerary action
Aloe-emodin, an Aloe vera anthraquinone, induces apoptosis and inhibits growth of gastric, oral squamous, hepatocellular, lung (incl. xenograft) and glioblastoma cancer cells, modulating caspases, Bcl-2/Bax, PI3K/Akt and MEK/ERK signalling (preclinical).
inferred from emollient action
inferred from analgesic action
inferred from antimicrobial action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
Relief of joint pain, osteoarthritis and rheumatic complaints
Analgesic and anti-inflammatory for low back pain (moderate evidence; dose-dependent, around 240 mg salicin/day) - in an RCT, 240 mg salicin/day left 39% pain-free vs 6% on placebo within 4 weeks
inferred from anti-inflammatory action
Analgesic and anti-inflammatory for low back pain (moderate evidence; dose-dependent, around 240 mg salicin/day) - in an RCT, 240 mg salicin/day left 39% pain-free vs 6% on placebo within 4 weeks; Relief of joint pain, osteoarthritis and rheumatic complaints
Safety, Cautions & Contraindications
Topical use of aloe gel is generally safe for most people. Oral use of aloe latex as a laxative is potentially unsafe with prolonged use due to risk of dehydration, electrolyte imbalance, and potential kidney damage. Aloe latex contains anthraquinone glycosides which may cause abdominal cramping and diarrhea. Not recommended during pregnancy or breastfeeding. May interact with diabetes medications, diuretics, and laxatives. Oral aloe gel at typical doses appears safe short-term but long-term safety is unclear. Allergic reactions possible in sensitive individuals.
Duke (2002) reports clinical evidence (score 2/3) supporting aloe gel's use in psoriasis, constipation (in adults), and as a vulnerary. Gel preparations have been clinically validated for peptic ulcers (excluding stress-induced), radiation burns, and skin ulcers. Dose: 1 tablespoon gel three times daily or 50–200 mg dried juice equivalent per day as a laxative. An important safety distinction is made: the gel (inner leaf mucilage) is AHPA Class 1 (safe), while the inner leaf juice or dried latex is Class 2b due to anthraquinone content and is contraindicated in intestinal inflammation, colitis, Crohn's disease, appendicitis, and during menstruation (Duke, 2002).
Because it works like aspirin, avoid willow bark if you are allergic to aspirin or salicylates, and do NOT give it to children or teenagers with a viral illness (risk of Reye's syndrome). Use caution in asthma (salicylate sensitivity).
Avoid with anticoagulant/antiplatelet medicines (bleeding risk) and in active peptic ulcer; avoid in pregnancy (especially the third trimester) and breastfeeding.
External Ids
Botanical Description
Succulent, rosette-forming perennial with thick, fleshy, lance-shaped leaves edged with soft, pale teeth, each leaf filled with a clear, slippery, mucilaginous gel beneath a tougher green rind. In favourable conditions it produces a tall flowering spike bearing tubular yellow (sometimes orange) flowers.[1]
Large deciduous tree (Salicaceae), 10-25 m tall (occasionally taller), fast-growing with a broad crown. Leaves are narrow and lance-shaped, silvery-white and silky-hairy beneath, giving the tree a shimmering appearance in the wind. Tiny flowers are borne in catkins appearing with the leaves in spring; the species is dioecious. The fruit is a small capsule releasing cottony-tufted seeds.[12]
Habitat
Believed native to the Arabian Peninsula, and now cultivated and naturalised throughout arid and semi-arid tropical and subtropical regions worldwide as a garden, medicinal and commercial crop.[1]
Native to Europe, western and central Asia and North Africa, growing on damp ground along riverbanks, floodplains and wet meadows; widely planted and naturalised elsewhere.[12]
Harvesting
Outer, mature leaves are cut close to the base as needed; the clear inner gel (mucilage) is separated from the outer rind and from the bitter yellow latex (aloin-containing exudate) just under the rind, since the gel and the latex have different uses and safety profiles.[1]
Bark is stripped from young branches (2-3-year-old growth is preferred, as salicin content is highest in younger bark) in spring, when the rising sap makes the bark peel most easily, then dried.[12]
Traditional Uses
Aloe vera has an ancient reputation, recorded from ancient Egypt onward, as a topical remedy for burns, wounds and skin inflammation (the 'burn plant' / 'first aid plant'), and the bitter leaf latex has been used traditionally as a stimulant laxative. It remains one of the most widely used topical botanicals for skin care and minor wound healing.[1]
Willow bark has one of the longest documented histories of any medicinal plant, used since antiquity (recorded by Hippocrates) as a remedy for pain and fever. Its salicin content, chemically related to aspirin, gives it official European herbal-monograph recognition for mild joint pain, headache and feverish colds, with modern clinical trials supporting benefit for low back pain.[11, 12]
Preparations
Dosage
The WHO monograph on Aloe Vera Gel specifies fresh gel, or preparations containing 10-70% fresh gel, applied to the affected skin area. Educational reference only, not a prescription.
Clinical trials for back pain have used around 240 mg salicin/day of standardised extract. Educational reference only, not a prescription; avoid if allergic to aspirin/salicylates, in children/teenagers with a viral illness (Reye's syndrome risk), or alongside anticoagulants.
References
Drug Class Interactions
Not documented
Lookalikes Review
Dangerous Lookalikes
Not documented
References & Sources
- Sanchez, M., Gonzalez-Burgos, E., Iglesias, I. and Gomez-Serranillos, M.P (2020) 'Pharmacological update properties of Aloe vera and its major active constituents', Molecules, 25(6), pp. 1324. doi:10.3390/molecules25061324 Meta-analysis / review
https://doi.org/10.3390/molecules25061324 - Kaur, S. and Bains, K (2023) 'Aloe barbadensis Miller (Aloe vera)', International Journal for Vitamin and Nutrition Research, 94(3-4), pp. 308-321. doi:10.1024/0300-9831/a000797 Meta-analysis / review
https://doi.org/10.1024/0300-9831/a000797 - Catalano, A., Ceramella, J., Iacopetta, D., Marra, M., Conforti, F., Lupi, F.R., Gabriele, D., Borges, F. and Sinicropi, M.S (2024) 'Aloe vera - an extensive review focused on recent studies', Foods, 13(13), pp. 2155. doi:10.3390/foods13132155 Meta-analysis / review
https://doi.org/10.3390/foods13132155 - Surjushe, A., Vasani, R. and Saple, D.G (2008) 'Aloe vera: a short review', Indian Journal of Dermatology, 53(4), pp. 163-166. doi:10.4103/0019-5154.44785 Meta-analysis / review
https://doi.org/10.4103/0019-5154.44785 - Liang, J., Cui, L., Li, J., Guan, S., Zhang, K. and Li, J (2020) 'Aloe vera: a medicinal plant used in skin wound healing', Tissue Engineering Part B: Reviews, 27(5), pp. 455-474. doi:10.1089/ten.TEB.2020.0236 Meta-analysis / review
https://doi.org/10.1089/ten.TEB.2020.0236 - Guo, X. and Mei, N (2016) 'Aloe vera: a review of toxicity and adverse clinical effects', Journal of Environmental Science and Health Part C, 34(2), pp. 77-96. doi:10.1080/10590501.2016.1166826 Meta-analysis / review
https://doi.org/10.1080/10590501.2016.1166826 - Boyapati, R., Peeta, J., Dhulipalla, R., Kolaparthy, L., Adurty, C. and Cheruvu, R.N.S (2024) 'Comparative evaluation of the efficacy of probiotic, Aloe vera, povidine-iodine, and chlorhexidine mouthwashes in the treatment of gingival inflammation: a randomized controlled trial', Dental and Medical Problems, 61(2), pp. 181-190. doi:10.17219/dmp/156425 Randomized trial
https://doi.org/10.17219/dmp/156425 - Hekmatpou, D., Mehrabi, F., Rahzani, K. and Aminiyan, A (2019) 'The effect of Aloe vera clinical trials on prevention and healing of skin wound: a systematic review', Iranian Journal of Medical Sciences, 44(1), pp. 1-9. Meta-analysis / review
https://scholar.google.com/scholar?q=The%20effect%20of%20Aloe%20vera%20clinical%20trials%20on%20prevention%20and%20healing%20of%20skin%20wound%3A%20a%20systematic%20review - Gao, Y., Kuok, K.I., Jin, Y. and Wang, R (2018) 'Biomedical applications of Aloe vera', Critical Reviews in Food Science and Nutrition, 59(sup1), pp. S244-S256. doi:10.1080/10408398.2018.1496320 Meta-analysis / review
https://doi.org/10.1080/10408398.2018.1496320 - Feily, A. and Namazi, M.R (2009) 'Aloe vera in dermatology: a brief review', Giornale Italiano di Dermatologia e Venereologia, 144(1), pp. 85-91. Meta-analysis / review
https://scholar.google.com/scholar?q=Aloe%20vera%20in%20dermatology%3A%20a%20brief%20review - Sierra-Garcia, G.D., Castro-Rios, R., Gonzalez-Horta, A., Lara-Arias, J. and Chavez-Montes, A (2014) 'Acemannan, an extracted polysaccharide from Aloe vera: a literature review', Natural Product Communications, 9(8), pp. 1217-1221. doi:10.1177/1934578x1400900836 Meta-analysis / review
https://doi.org/10.1177/1934578x1400900836 - World Health Organization (1999) 'Aloe Vera Gel'. Available at: https://iris.who.int/items/6418d8af-5200-4e6b-9bf5-004f3aa62a37 Traditional / reference
https://iris.who.int/items/6418d8af-5200-4e6b-9bf5-004f3aa62a37 - Femenia A, Sánchez ES, Simal S, Rosselló C. Compositional features of polysaccharides from Aloe vera (1999) ';39(2):109-117', 39(2). Traditional / reference
https://scholar.google.com/scholar?q=%3B39%282%29%3A109-117. - Catalano A, Iacopetta D, Ceramella J, et al. Aloe vera - An extensive review focused on recent studies. Foods. 2024;13 (2024) ';13(13):2155', 13(13). Traditional / reference
https://scholar.google.com/scholar?q=%3B13%2813%29%3A2155. - Hekmatpou D, Mehrabi F, Rahzani K, Aminiyan A. The effect of Aloe vera clinical trials on prevention and healing of skin wound: A systematic review. Iran J Med Sci. 2019;44 (2019) ';44(1):1-9', 44(1). Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC6330525/ Traditional / reference
https://pmc.ncbi.nlm.nih.gov/articles/PMC6330525/ - National Center for Complementary and Integrative Health. Aloe vera. NIH. 2020. https://www.nccih.nih.gov/health/aloe-vera (2020) 'https://www.nccih.nih.gov/health/aloe-vera'. Available at: https://www.nccih.nih.gov/health/aloe-vera Traditional / reference
https://www.nccih.nih.gov/health/aloe-vera - Sahu PK, Giri DD, Singh R, et al. Therapeutic and medicinal uses of Aloe vera: A review. Pharmacol Pharm. 2013;4:599-610 (2013) ';4:599-610'. Traditional / reference
https://scholar.google.com/scholar?q=%3B4%3A599-610. - Sánchez M, González-Burgos E, Iglesias I, Gómez-Serranillos MP. Pharmacological update properties of Aloe vera and its major active constituents. Molecules. 2020;25 (2020) ';25(6):1324', 25(6). Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC7144722/ Traditional / reference
https://pmc.ncbi.nlm.nih.gov/articles/PMC7144722/ - Surjushe A, Vasani R, Saple DG. Aloe vera: A short review. Indian J Dermatol. 2008;53 (2008) ';53(4):163-166', 53(4). Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC2763764/ Traditional / reference
https://pmc.ncbi.nlm.nih.gov/articles/PMC2763764/ - Ulbricht C, Armstrong J, Basch E, et al. An evidence-based systematic review of Aloe vera by the Natural Standard Research Collaboration. J Herb Pharmacother. 2008;7 (2008) ';7(3-4):279-323'. Available at: https://www.ncbi.nlm.nih.gov/books/NBK92765/ Traditional / reference
https://www.ncbi.nlm.nih.gov/books/NBK92765/ - Haroon, N. and Amjad, A. and Maaz, M. and Noman, A.M. and Anees, N. and Muhammad, Z. and Shah, M. and Al Abdulmonem, W (2026) 'Phytochemistry, Bioavailability, and Molecular Mechanisms Underlying Multitarget Anticancer Activity of Aloe vera', Nutrients, 18(12), pp. 2034. doi:10.3390/nu18122034 Preclinical
https://doi.org/10.3390/nu18122034 - Chen, S.-H. and Lin, K.-Y. and Chang, C.-C. and Fang, C.-L. and Lin, C.-P (2007) 'Aloe-emodin-induced apoptosis in human gastric carcinoma cells', Food and Chemical Toxicology, 45(11), pp. 2296-2303. doi:10.1016/j.fct.2007.06.005 Preclinical
https://doi.org/10.1016/j.fct.2007.06.005 - Li, Q. and Wen, J. and Yu, K. and Shu, Y. and He, W. and Chu, H. and Zhang, B. and Ge, C (2018) 'Aloe-emodin induces apoptosis in human oral squamous cell carcinoma SCC15 cells', BMC Complementary and Alternative Medicine, 18(1), pp. 296. doi:10.1186/s12906-018-2353-z Preclinical
https://doi.org/10.1186/s12906-018-2353-z - Arcella, A. and Sanchez, M (2021) 'Natural substances to potentiate canonical glioblastoma chemotherapy', Journal of Chemotherapy, 33(5), pp. 276-287. doi:10.1080/1120009X.2021.1873633 Preclinical
https://doi.org/10.1080/1120009X.2021.1873633 - Zhu, M. and He, Q. and Wang, Y. and Duan, L. and Rong, K. and Wu, Y. and Ding, Y. and Mi, Y. and Ge, X. and Yang, X. and Yu, Y (2023) 'Exploring the mechanism of aloe-emodin in the treatment of liver cancer through network pharmacology and cell experiments', Frontiers in Pharmacology, 14, pp. 1238841. doi:10.3389/fphar.2023.1238841 Preclinical
https://doi.org/10.3389/fphar.2023.1238841 - Kim, H.J. and Choi, J.W. and Ree, J. and Lim, J.S. and Lee, J. and Kim, J.I. and Thapa, S.B. and Sohng, J.K. and Park, Y.I (2022) 'Aloe emodin 3-O-glucoside inhibits cell growth and migration and induces apoptosis of non-small-cell lung cancer cells via suppressing MEK/ERK and Akt signalling pathways', Life Sciences, 300, pp. 120495. doi:10.1016/j.lfs.2022.120495 Preclinical
https://doi.org/10.1016/j.lfs.2022.120495 - 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 - Suksomboon, N., Poolsup, N. and Punthanitisarn, S (2016) 'Effect of Aloe vera on glycaemic control in prediabetes and type 2 diabetes: a systematic review and meta-analysis', Journal of Clinical Pharmacy and Therapeutics, 41(2), pp. 180-188. doi:10.1111/jcpt.12382 Meta-analysis / review
https://doi.org/10.1111/jcpt.12382 - Suksomboon, N., Poolsup, N. and Punthanitisarn, S (2016) 'Effect of Aloe vera on glycaemic control in prediabetes and type 2 diabetes: a systematic review and meta-analysis', Journal of Clinical Pharmacy and Therapeutics, 41(2), pp. 180-188. doi:10.1111/jcpt.12382 Meta-analysis / review
https://doi.org/10.1111/jcpt.12382 - Gardening Know How 'Aloe Vs. Agave Plants: What's The Difference Between Aloe And Agave'. Available at: https://www.gardeningknowhow.com/ornamental/cacti-succulents/scgen/how-to-tell-agave-and-aloe-apart.htm Traditional / reference
https://www.gardeningknowhow.com/ornamental/cacti-succulents/scgen/how-to-tell-agave-and-aloe-apart.htm - Ricks, M.R. and Vogel, P.S. and Elston, D.M. and Hivnor, C (1999) 'Purpuric agave dermatitis', Journal of the American Academy of Dermatology, 40(2 Pt 2), pp. 356-8. doi:10.1016/s0190-9622(99)70485-8 Clinical study
https://doi.org/10.1016/s0190-9622(99)70485-8 - Genillier-Foin, N. and Avenel-Audran, M (2007) 'Purpuric contact dermatitis from Agave americana', Annales de Dermatologie et de Venereologie, 134(5 Pt 1), pp. 477-8. doi:10.1016/s0151-9638(07)89218-0 Clinical study
https://doi.org/10.1016/s0151-9638(07)89218-0
- Shara, M. and Stohs, S.J (2015) 'Efficacy and Safety of White Willow Bark (Salix alba) Extracts', Phytotherapy Research, 29(8), pp. 1112-1116. doi:10.1002/ptr.5377 Meta-analysis / review
https://doi.org/10.1002/ptr.5377 - Maistro, E.L., Terrazzas, P.M., Perazzo, F.F., Gaivao, I.O.M. and others (2020) 'Salix alba (white willow) medicinal plant presents genotoxic effects in human cultured leukocytes', Journal of Toxicology and Environmental Health, Part A, 82(23-24), pp. 1223-1234. doi:10.1080/15287394.2019.1711476 Preclinical
https://doi.org/10.1080/15287394.2019.1711476 - Matyjaszczyk, E. and Schumann, R. (EU-FORA) (2018) 'Risk assessment of white willow (Salix alba) in food', EFSA Journal, 16(Suppl 1), pp. e16081. doi:10.2903/j.efsa.2018.e16081 Meta-analysis / review
https://doi.org/10.2903/j.efsa.2018.e16081 - Phillips, H.N., Sharpe, K.T., Endres, M.I. and Heins, B.J (2021) 'Effects of oral white willow bark (Salix alba) and intravenous flunixin meglumine on prostaglandin E2 in healthy dairy calves', JDS Communications, 3(1), pp. 49-54. doi:10.3168/jdsc.2021-0138 Preclinical
https://doi.org/10.3168/jdsc.2021-0138 - Kong, C.S., Kim, K.H., Choi, J.S., Kim, J.E. and others (2014) 'Salicin, an extract from white willow bark, inhibits angiogenesis by blocking the ROS-ERK pathways', Phytotherapy Research, 28(8), pp. 1246-1251. doi:10.1002/ptr.5126 Preclinical
https://doi.org/10.1002/ptr.5126 - Noleto-Dias, C., Ward, J.L., Bellisai, A., Lomax, C. and Beale, M.H (2018) 'Salicin-7-sulfate: A new salicinoid from willow and implications for herbal medicine', Fitoterapia, 127, pp. 166-172. doi:10.1016/j.fitote.2018.02.009 Preclinical
https://doi.org/10.1016/j.fitote.2018.02.009 - Wolfle, U., Haarhaus, B., Kersten, A., Fiebich, B. and others (2015) 'Salicin from Willow Bark can Modulate Neurite Outgrowth in Human Neuroblastoma SH-SY5Y Cells', Phytotherapy Research, 29(10), pp. 1494-1500. doi:10.1002/ptr.5400 Preclinical
https://doi.org/10.1002/ptr.5400 - Gagnier, J.J., van Tulder, M., Berman, B. and Bombardier, C (2006) 'Herbal medicine for low back pain (Cochrane review)', Cochrane Database of Systematic Reviews, (2), pp. CD004504. doi:10.1002/14651858.CD004504.pub3 Meta-analysis / review
https://doi.org/10.1002/14651858.CD004504.pub3 - Oltean, H., Robbins, C., van Tulder, M.W., Berman, B.M. and others (2014) 'Herbal medicine for low-back pain (Cochrane review update)', Cochrane Database of Systematic Reviews, 2014(12), pp. CD004504. doi:10.1002/14651858.CD004504.pub4 Meta-analysis / review
https://doi.org/10.1002/14651858.CD004504.pub4 - Amel Zabihi, N., Mahmoudabady, M., Soukhtanloo, M., Hayatdavoudi, P. and others (2018) 'Salix alba attenuated oxidative stress in the heart and kidney of hypercholesterolemic rabbits', Avicenna Journal of Phytomedicine, 8(1), pp. 63-72. Preclinical
https://scholar.google.com/scholar?q=Salix%20alba%20attenuated%20oxidative%20stress%20in%20the%20heart%20and%20kidney%20of%20hypercholesterolemic%20rabbits - Vlachojannis, J.E., Cameron, M. and Chrubasik, S (2009) 'A systematic review on the effectiveness of willow bark for musculoskeletal pain', Phytotherapy Research. doi:10.1002/ptr.2747 Meta-analysis / review
https://doi.org/10.1002/ptr.2747 - European Medicines Agency (HMPC) (n.d.) 'European Union herbal monograph on Salix [various species], cortex (Salicis cortex)'. Available at: https://www.ema.europa.eu/en/medicines/herbal/salicis-cortex Traditional / reference
https://www.ema.europa.eu/en/medicines/herbal/salicis-cortex - Chrubasik, S., Eisenberg, E., Balan, E., Weinberger, T., Luzzati, R. and Conradt, C (2000) 'Treatment of low back pain exacerbations with willow bark extract: a randomized double-blind study', The American Journal of Medicine, 109(1), pp. 9--14. doi:10.1016/S0002-9343(00)00442-3 Randomized trial
https://doi.org/10.1016/S0002-9343(00)00442-3
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.