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General Description

Takuna is an extract produced from the bark of Cecropia strigosa, a tree that is found throughout South America. It has recently been found to have very powerful antiviral properties as well as some other general antimicrobial properties. Practitioners using the product have found that Takuna given every hour usually resolves influenzas in just a few hours. In some cases, the symptoms are resolved in as little as one hour. Practitioners also report that Takuna is effective against some bacterial infections and some fungal infections.

Some Reported Medicinal Properties



















Research On NutraMedix Product

In vitro – Lyme Disease

Priyanka A.S. Theophilus M.S., Eva Sapi Ph.D. (2013). In Vitro Effect of Peruvian Antimicrobial Agents on Borrelia burgdorferi Full Article

in vivo – Anti-inflammatory

At the University of Guayaquil, Ecuador, Takuna produced an anti-inflammatory effect 73% as strong as Feldeneas an anti-inflammatory. Full Article

in vivo acute oral toxicity tests

An Acute Oral toxicity study was conducted by the Department of Chemical Sciences at the University of Guayaquil, Ecuador.  The general conclusion was that Takuna did not produce toxic effects when used in accordance to the guidelines described in OECD TG 423, thus the product is considered practically innocuous for humans when administered in the acute form. Therefore; studies of acute toxicity at higher doses in humans are not necessary. Full Article 

Medical Conditions [peer-reviewed journals]


Dietrich, F., Kaiser,S., Rockenbach, L., Figueiró, F., Bergamin, L. S., da Cunha, F. M., ... &Battastini, A. M. O. (2014). Quinovicacid glycosides purified fraction from Uncaria tomentosa induces cell death byapoptosis in the T24 human bladder cancer cell line. Food and Chemical Toxicology67, 222-229. Full Article


Prado, E. G., Gimenez,M. G., De la Puerta Vázquez, R., Sánchez, J. E., & Rodriguez, M. S. (2007). Antiproliferative effects ofmitraphylline, a pentacyclic oxindole alkaloid of Uncaria tomentosa on humanglioma and neuroblastoma cell linesPhytomedicine, 14(4),280-284. Full Article


Baraya, Y. U. S. A. B.,Wong, K. K., & Yaacob, N. S. (2017). The immunomodulatory potential of selected bioactive plant-based compounds in breast cancer: a review. Anti-Cancer Agents in Medicinal Chemistry (Formerly Current Medicinal Chemistry-Anti-Cancer Agents), 17(6), 770-783. Full Article

García Giménez, M. D., García Prado, E., Sáenz Rodríguez, M. T., Fernández Arche, M. D. L. Á., & Puerta Vázquez-Zafra, R. D. L. (2010). Cytotoxic effect of the pentacyclic oxindole alkaloid mitraphylline isolated from Uncaria tomentosa bark on human Ewing's sarcoma and breast cancer cell lines. Planta Medica, 76, 133-136. Full Article

Riva, L., Coradini, D., Di, G. F., De, V. F., De, N. T., De, F. S., & Pizza, C. (2001). The antiproliferative effects of Uncaria tomentosa extracts and fractions on the growth of breast cancer cell line. Anticancer Research, 21(4A), 2457-2461. Full Article


Dietrich, F., Martins,J. P., Kaiser, S., Silva, R. B. M., Rockenbach, L., Edelweiss, M. I. A., ...& Battastini, A. M. O. (2015). The quinovic acid glycosides purified fraction from Uncaria tomentosa protects against hemorrhagic cystitis induced by cyclophosphamide in micePloS one, 10(7), e0131882. Full Article


Reis, S. R. I., Valente,L. M., Sampaio, A. L., Siani, A. C., Gandini, M., Azeredo, E. L., ... &Kubelka, C. F. (2008). Immunomodulating and antiviralactivities of Uncaria tomentosa on human monocytes infected with Dengue Virus-2International Immunopharmacology,8(3), 468-476. Full Article


Tay, L. Y., Dos Santos,F. A., & Jorge, J. H. (2015). Uncaria tomentosa gel against denture stomatitis: clinical reportJournal of Prosthodontics,24(7), 594-597. Full Article


Neto, J. N., Coelho, T.M., Aguiar, G. C., Carvalho, L. R., de Araújo, A. G. P., Girão, M. J. B., & Schor, E. (2011). Experimental endometriosis reduction in rats treated with Uncaria tomentosa (cat's claw)extractEuropean Journal of Obstetrics and Gynecology and Reproductive Biology, 154(2), 205-208. Full Article


Caon, T., Kaiser, S.,Feltrin, C., de Carvalho, A., Sincero, T. C. M., Ortega, G. G., & Simões,C. M. O. (2014). Antimutagenic and antiherpetic activities of different preparations from Uncaria tomentosa (cat’s claw). Food and Chemical Toxicology, 66, 30-35. Full Article


Araujo, L. C., Feitosa, K.B., Murata, G. M., Furigo, I. C., Teixeira, S. A., Lucena, C. F., ... & Bordin, S. (2018). Uncaria tomentosa improves insulin sensitivity and inflammation in experimental NAFLDScientific reports, 8(1), 11013. Full Article

Zhang, Q., Zhao, J. J., Xu,J., Feng, F., & Qu, W. (2015). Medicinal uses, phytochemistry and pharmacology of the genus Uncaria. Journal of Ethnopharmacology173, 48-80. Full Article

Hao, P. P., Jiang, F., Chen,Y. G., Yang, J., Zhang, K., Zhang, M. X., ... & Zhang, Y. (2015). Traditional Chinese medication for cardiovascular diseaseNature Reviews Cardiology, 12(2), 115. Full Article

Ranilla, L. G., Kwon, Y.I., Apostolidis, E., & Shetty, K. (2010). Phenolic compounds, antioxidant activity and in vitro inhibitory potential against key enzymes relevant for hyperglycemia and hypertension of commonly used medicinal plants, herbs and spices in Latin AmericaBioresource technology, 101(12), 4676-4689. Full Article

Immune-mediated diseases (diabetes)                   

Layanne C C Arauj, Isadora C Furig, Gilson M Murata, J Donato Jr, Silvana Bordin, Rui Curi & Carla R O Carvalho (2017). The insulin resistance induced by obesity is reversed by Uncaria tomentosa through modulation of inflammatory pathway in the liver of mice. Journal of Diabetes and medicine, 8(10). Full Article

Domingues, A., Sartori, A., Golim, M. A., Valente, L. M. M., da Rosa, L. C., Ishikawa, L. L. W., ...& Viero, R. M. (2011). Prevention of experimental diabetes by Uncaria tomentosa extract: Th2 polarization, regulatory T cell preservation or both?Journal of Ethnopharmacology, 137(1), 635-642. Full Article

Yessoufou,A., Gbenou, J., Grissa, O., Hichami, A., Simonin, A. M., Tabka, Z., ... & Khan, N. A. (2013). Anti-hyperglycemic effects of three medicinal plants in diabetic pregnancy: modulation of T cell proliferationBMC complementary and alternative medicine, 13(1), 77. Full Article

Araujo, L. C., Feitosa,K. B., Murata, G. M., Furigo, I. C., Teixeira, S. A., Lucena, C. F., ... &Bordin, S. (2018). Uncaria tomentosa improves insulin sensitivity and inflammation in experimental NAFLDScientific reports, 8(1),11013. Full Article

Mahmoudian-Sani,M., Luther, T., Asadi-Samani, M., Saeedi-Boroujeni, A., & Gholamian, N.(2017). A new approach for treatment of type 1 diabetes: Phytotherapy and phytopharmacology of regulatory T cellsJ Renal Inj Prev, 6(3),158-63. Full Article

Pane,Y. S., Ganie, R. A., Lindarto, D., & Lelo, A. (2018). The Effect of Gambier Extract on the Levels of Malondialdehyde, Superoxide Dismutase, and Blood Glucose in Type 2 Diabetes Mellitus PatientsAsian J Pharm Clin Res,11(10), 121-124. Full Article


Pilarski, R.,Poczekaj-Kostrzewska, M., Ciesiolka, D., Szyfter, K., & Gulewicz, K.(2007). Antiproliferative activity of various Uncaria tomentosa preparations on HL-60 promyelocytic leukemia cells. Pharmacological reports,59(5), 565. Full Article


Eberlin, S., dos Santos,L. M., & Queiroz, M. L. (2005). Uncaria tomentosa extract increases the number of myeloid progenitor cells in the bone marrow of mice infected with Listeria monocytogenes. International Immunopharmacology, 5(7-8), 1235-1246. Full Article


Piscoya, J., Rodriguez,Z., Bustamante, S. A., Okuhama, N. N., Miller, M. J. S., & Sandoval, M.(2001). Efficacy and safety of freeze-dried cat's claw in osteoarthritis of the knee: mechanisms of action of the species Uncaria guianensis. Inflammation Research, 50(9), 442-448. Full Article

Rheumatoid Arthritis

Mur, E., Hartig, F.,Eibl, G., & Schirmer, M. (2002). Randomized double-blind trial of an extract from the pentacyclic alkaloid-chemotype of Uncaria tomentosa for the treatment of rheumatoid arthritisThe Journal of Rheumatology,29(4), 678-681. Full Article


Ciani, F., Tafuri, S.,Troiano, A., Cimmino, A., Fioretto, B. S., Guarino, A. M., ... & Calabrò,V. (2018). Anti-proliferative and pro-apoptotic effects of Uncaria tomentosa aqueous extract in squamous carcinoma cellsJournal of Ethnopharmacology, 211, 285-294. Full Article


Rinner, B., Li, Z. X.,Haas, H., Siegl, V., Sturm, S., Stuppner, H., & Pfragner, R. (2009). Antiproliferative and pro-apoptoticeffects of Uncaria tomentosa in human medullary thyroid carcinoma cellsAnticancer Research,29(11), 4519-4528. Full Article


Santos, K. F.,Gutierres, J. M., Pillat, M. M., Rissi, V. B., dos Santos Araújo, M. D. C.,Bertol, G., ... & Morsch, V. M. (2016). Uncaria tomentosa extract alters the catabolism of adenine nucleotides and expressionof ecto-5′-nucleotidase/CD73 and P2X7 and A1 receptors in the MDA-MB-231cell line. Journal of Ethnopharmacology, 194, 108-116. Full Article

dePaula, L. C. L., Fonseca, F., Perazzo, F., Cruz, F. M., Cubero, D., Trufelli,D. C., ... & del Giglio, A. (2015). Uncaria tomentosa (cat's claw) improves quality of life in patients with advanced solid tumorsThe Journal of Alternative and Complementary Medicine, 21(1), 22-30. Full Article

Dreifuss, A. A., Bastos-Pereira, A. L., Ávila, T. V., da Silva Soley, B., Rivero, A. J.,Aguilar, J. L., & Acco, A. (2010). Antitumoral and antioxidant effects of a hydroalcoholic extract of cat's claw (Uncaria tomentosa) (Willd. Ex Roem. & Schult) in an in vivo carcinosarcoma modelJournal of Ethnopharmacology, 130(1), 127-133. Full Article

Medicinal Properties [peer-reviewed journals]


Allen,L., Buckner, A., Buckner, C. A., Cano, P., & Lafrenie, R. M. (2017). Uncaria tomentosa (Willd. ex Schult.) DC (Rubiaceae) sensitizes THP-1 cells to radiation-induced cell deathPharmacognosy Research,9(3), 221. Full Article

Farias,I., do Carmo Araújo, M., Zimmermann, E. S., Dalmora, S. L., Benedetti, A. L.,Alvarez-Silva, M., ... & Schetinger, M. R. C. (2011). Uncaria tomentosa stimulates the proliferation of myeloid progenitor cellsJournal of Ethnopharmacology, 137(1), 856-863. Full Article


Nowakowska,J., Bany, J., Zdanowska, D., Czubaj, A., Kuraś, M., & Skopińska-Różewska, E.(2009). Experimental Immunology: The effect of the bark water extract Uncaria tomentosa on the Pseudomonas aeruginosa infection in mice. Central European Journal of Immunology, 34(3), 162-165. Full Article


Moraes,R. C., Carvalho, A. R., Lana, A. J. D., Kaiser, S., Pippi, B., Fuentefria, A.M., & Ortega, G. G. (2017). In vitro synergism of a water insoluble fraction of Uncaria tomentosa combined with fluconazole and terbinafine against resistant non-Candida albicans isolates. Pharmaceutical biology, 55(1), 406-415. Full Article

Moraes,R. C., Dalla Lana, A. J., Kaiser, S., Carvalho, A. R., de Oliveira, L. F. S., Fuentefria, A. M., & Ortega, G. G. (2015). Antifungal activity of Uncaria tomentosa (Willd.) DC against resistant non-albicans Candida isolatesIndustrial Crops and Products,69, 7-14. Full Article


Montserrat-dela Paz, S., Fernandez-Arche, A., de la Puerta, R., Quilez, A. M., Muriana, F.J., Garcia-Gimenez, M. D., & Bermudez, B. (2016). Mitraphylline inhibits lipopolysaccharide-mediated activation of primary human neutrophils. Phytomedicine, 23(2), 141-148. Full Article

Rojas-Duran,R., González-Aspajo, G., Ruiz-Martel, C., Bourdy, G., Doroteo-Ortega, V. H.,Alban-Castillo, J., ... & Deharo, E. (2012). Anti-inflammatory activity of Mitraphylline isolated from Uncaria tomentosa bark. Journal of Ethnopharmacology, 143(3),801-804. Full Article

Gonçalves,C., Dinis, T., & Batista, M. T. (2005). Antioxidant properties of proanthocyanidins of Uncaria tomentosa bark decoction: a mechanism for anti-inflammatory activity. Phytochemistry, 66(1), 89-98. Full Article


Paniagua‐Pérez, R., Madrigal‐Bujaidar, E., Molina‐Jasso, D., Reyes‐Cadena, S., Álvarez‐González, I., Sánchez‐Chapul, L., & Pérez‐Gallaga, J. (2009). Antigenotoxic, antioxidant, and lymphocyte induction effects produced by pteropodine. Basic & clinical pharmacology& toxicology, 104(3), 222-227. Full Article


Herrera,D. R., Tay, L. Y., Rezende, E. C., Kozlowski Jr, V. A., & dos Santos, E. B.(2010). In vitro antimicrobial activity of phytotherapic Uncaria tomentosa against endodontic pathogensJournal of oral science,52(3), 473-476. Full Article


Dreifuss,A. A., Bastos-Pereira, A. L., Fabossi, I. A., dos Reis Lívero, F. A., Stolf, A.M., de Souza, C. E. A., ... & Teixeira, S. (2013). Uncaria tomentosa exerts extensiveanti-neoplastic effects against the Walker-256 tumor by modulating oxidative stress and not by alkaloid activity. PLoS One, 8(2), e54618. Full Article

Rinner,B., Li, Z. X., Haas, H., Siegl, V., Sturm, S., Stuppner, H., & Pfragner, R.(2009). Anti-proliferative and pro-apoptotic effects of Uncaria tomentosa in human medullary thyroid carcinoma cellsAnticancer research, 29(11), 4519-4528. Full Article


Bukowska,B., Bors, M., Gulewicz, K., & Koter-Michalak, M. (2012). Uncaria tomentosa extracts protect human erythrocyte catalase against damage induced by 2, 4-D-Na and its metabolitesFood and Chemical Toxicology, 50(6), 2123-2127. Full Article

Amaral,S., Mira, L., Nogueira, J. M. F., da Silva, A. P., & Florêncio, M. H.(2009). Plant extracts with anti-inflammatory properties—A new approach for characterization of their bioactive compounds and establishment of structure-antioxidant activity relationshipsBioorganic & Medicinal Chemistry, 17(5), 1876-1883. Full Article

Trejo‐Tapia, G., Sepúlveda‐Jiménez, G., Trejo‐Espino, J. L., Cerda‐García‐Rojas, C. M., De La Torre, M., Rodríguez‐Monroy, M., & Ramos‐Valdivia, A. C. (2007). Hydrodynamic stress induces monoterpenoid oxindole alkaloid accumulation by Uncaria tomentosa (Willd) DCcell suspension cultures via oxidative burst. Biotechnology and Bioengineering,98(1), 230-238. Full Article

Cisneros,F. J., Jayo, M., & Niedziela, L. (2005). An Uncaria tomentosa (cat's claw) extract protects mice against ozone-induced lung inflammation. Journal of Ethnopharmacology, 96(3), 355-364. Full Article


Kang,T. H., Matsumoto, K., Tohda, M., Murakami, Y., Takayama, H., Kitajima, M., ...& Watanabe, H. (2002). Pteropodine and isopteropodine positively modulate the function of rat muscarinic M1 and 5-HT2 receptors expressed in Xenopus oocyteEuropeanjournal of pharmacology, 444(1-2), 39-45. Full Article


Sandoval,M., Charbonnet, R. M., Okuhama, N. N., Roberts, J., Krenova, Z., Trentacosti,A. M., & Miller, M. J. (2000). Cat’s Claw inhibits TNFα production and scavenges free radicals: role in cytoprotection. Free Radical Biology andMedicine,29(1), 71-78. Full Article


Lozada-Requena,I., Núñez, C., Alvárez, Y., Kahn, L., & Aguilar, J. (2015). Lymphocyte subsets, dendritic cellsand cytokine profiles in mice with melanoma treated with Uncaria tomentosa. RevistaPeruana de Medicina Experimental y Salud Publica, 32(4), 633-642.(Spanish). Full Article

Núñez,C., Lozada-Requena, I., Ysmodes, T., Zegarra, D., Saldaña, F., & Aguilar,J. (2015). Immunomodulation of Uncaria tomentosa over dendritic cells, il-12 and profile TH1/TH2/TH17 in breast cancer. Revista Peruana de Medicina Experimental y Salud Publica, 32(4), 643-651. Full Article

Montserrat-DeLa Paz, S., De la Puerta, R., Fernandez-Arche, A., Quilez, A. M., Muriana, F.J. G., Garcia-Gimenez, M. D., & Bermudez, B. (2015). Pharmacological effects of mitraphylline from Uncaria tomentosa in primary human monocytes: skew toward M2macrophages. Journal of Ethnopharmacology, 170, 128-135. Full Article

Domingues,A., Sartori, A., Valente, L. M. M., Golim, M. A., Siani, A. C., & Viero, R.M. (2011). Uncaria tomentosa Aqueous‐ethanol Extract Triggers an Immunomodulation toward a Th2 Cytokine Profile. Phytotherapy Research, 25(8), 1229-1235. Full Article

Kang,T. H., Matsumoto, K., Tohda, M., Murakami, Y., Takayama, H., Kitajima, M., ...& Watanabe, H. (2002). Pteropodineand isopteropodine positively modulate the function of rat muscarinic M1 and5-HT2 receptors expressed in Xenopus oocyte. European Journal of Pharmacology,444(1-2), 39-45. Full Article

Karl-HeinzReinhard (1999). Uncaria tomentosa (Willd.) D.C.: Cat's Claw, Una de Gato, or Saventaro. The Journal of Alternative andComplementary Medicine, pp. 143-151 Full Article

Medicinal Properties
[other journals]

Medical Conditions [other journals]


Conference Presentations

Cowden Support Program for Lyme: Observational Study – Dublin, Ireland – June, 2012 Armin Schwarzbach, MD PhD Full Video

Patient Reports

"I used it against chronic scalp lesions suspected from EBV and it definitely improved them by 80% in two weeks.  The mechanism of action is to bind with sugars in the viral envelope so I take it on an empty stomach and give it 15 minutes to work before eating anything else."-A.B.

“Hey... This stuff actually works. My family has used it all winter when attacked by the flu virus and remain pleased! Take it right away when the symptoms are first felt. It does wonders.” – V.H

“Love this stuff!!! If you haven't seen the 2 minute YouTube video you should. It wipes out viruses for us just like the video says. I keep it in stock in the house at all times.” – D.T

"LOVE this product!!! I keep this on hand at all times. If you take 30-60 drops of this in water at the onset of cold or flu, it will knock it out!!!! AWESOME RESULTS!!"-S.A.

"This stuff actually works. My family has used it all winter when attacked by the flu virus and remain pleased! Take it right away when the symptoms are first felt. It does wonders."-V.H.

Dosage Information

Acute Infections: 30 drops every hour. 

Chronic Infections: 30 drops 2-4 times daily at least 30 minutes before a meal and/or at bedtime.












Safety Information

An Acute Oral toxicity study was conducted by the Department of Chemical Sciences at the University of Guayaquil, Ecuador.  The general conclusion was that Takuna did not produce toxic effects when used in accordance to the guidelines described in OECD TG 423, thus the product is considered practically innocuous for humans when administered in the acute form. Therefore; studies of acute toxicity at higher doses in humans are not necessary. Full Article 

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Takuna: Acute Oral Toxicity

Takuna will be used in humans because of the vital importance of carrying out these first-step tests. They will not only guarantee the quality of the product, but will also establish that there are no adverse side effects in humans who take the product. As discussed in numerous international works, the study of acute toxicity is indispensable, and guarantees (within the margin of error associated with the technique) that the potential for toxicity from the compounds that will be ingested or that may enter into the system accidentally will be learned.

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Takuna: Anti-Inflammatory Effect

The auricular edema is achieved by applying 12-0- Tetradecanoil Forbol-13 Acetate (TPA), one of the components responsible for the irritating action of croton oil, into the auditory pavilion of the mouse. The inflammatory reaction consists of erythema , edema and infiltration by polymorphonuclear leukocytes. As such, eicosanoid -type mediators are freed, inducing degranulation of the mast cell. This technique thus allows the evaluation of the inhibiting substances of the biosynthesis of prostaglandins and leukotrienes.

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