Guest Author:  Dr. Leslie Taylor

Botanical Name: Annona muricata

Synonyms: Annona macrocarpa, A. bonplandiana, A. cearensis, Guanabanus muricatus

Common Names: Graviola, soursop, guanábana, guanábano, guanavana, guanaba, corossol épineux, huanaba, toge-banreisi, durian benggala, nangka blanda, cachiman épineux

Parts of the Plant that are Used

Leaves, fruit, seeds, bark, roots.

Plant Description

Graviola is a small, upright evergreen tree, 5-6 m high, with large, glossy, dark green leaves. It produces a large, heart-shaped, edible fruit that is 15-23 cm in diameter, is yellow-green in color, and has white flesh inside. Graviola is indigenous to most of the warmest tropical areas in South and North America, including the Amazon. The fruit is sold in local markets in the tropics, where it is called guanábana in Spanish-speaking countries and graviola in Brazil. The fruit pulp is excellent for making drinks and sherbets and, though slightly sour-acid, can be eaten out of hand.

Soursop Juice

Documented Properties and Actions

Antibacterial, anthelmintic, anticancerous, anticonvulsant, antidepressant, antifungal, antimicrobial, antineoplastic, antiparasitic, antispasmodic, antitumorous, antiviral, astringent, cardiodepressant, cytostatic, cytotoxic, febrifuge, hypotensive, insecticide, nervine, pectoral, piscicide, sedative, stomachic, vasodilator, and vermifuge.

Plant Chemicals

Annonaceous acetogenins: annocatalin, annohexocin, annomonicin, annomontacin, annomuricatin A & B, annomuricin A thru E, annomutacin, annonacin, (multiple iso, cis, one, etc.), annonacinone, annopentocin A thru C, cis-annonacin, cis-corossolone, cohibin A thru D, corepoxylone, coronin, corossolin, corossolone, donhexocin, epomuricenin A &B, gigantetrocin, gigantetrocin A & B, gigantetrocinone, gigantetronenin, goniothalamicin, iso-annonacin, javoricin, montanacin, montecristin, muracin A thru G, muricapentocin, muricatalicin, muricatalin, muri-catenol, muricatetrocin A & B muricatin D, muricatocin A thru C, muricin H, muricin I, muricoreacin, murihexocin 3, murihexocin A thru C, murihexol, murisolin, robustocin, rolliniastatin 1 & 2, saba-delin, solamin, uvariamicin I & IV, xylomaticin. 

Plant Uses

All parts of the graviola tree are used in natural medicine in the tropics, including the bark, leaves, roots, fruit, and fruit seeds. Different properties and uses are attributed to the different parts of the tree. Generally, the fruit and fruit juice are taken for worms and parasites, to cool fevers, as a lactagogue (to increase mother’s milk after childbirth), and as an astringent for diarrhea and dysentery. The crushed seeds are used as a vermifuge and anthelmintic against internal and external parasites, head lice, and worms. The bark, leaves, and roots are considered sedative, antispasmodic, hypotensive, and nervine, and a tea is made for various disorders toward those effects.

Graviola has a long, rich history of use in herbal medicine as well as lengthy recorded indigenous use. In the Peruvian Andes, a leaf tea is used for catarrh (inflammation of mucous membranes) and the crushed seed is used to kill parasites. In the Peruvian Amazon the bark, roots, and leaves are used for diabetes and as a sedative and antispasmodic. Indigenous tribes in Guyana use a leaf and/or bark tea as a sedative and heart tonic. In the Brazilian Amazon a leaf tea is used for liver problems, and the oil of the leaves and unripe fruit is mixed with olive oil and used externally for neuralgia, rheumatism, and arthritis pain. In Jamaica, Haiti, and the West Indies, the fruit and/or fruit juice is used for fevers, parasites and diarrhea, and as a lactagogue; the bark or leaf is used as an antispasmodic, sedative, and nervine for heart conditions, coughs, grippe, difficult childbirth, asthma, asthenia, hypertension, and parasites

Many bioactive compounds and phytochemicals have been found in graviola, as scientists have been studying its properties since the 1940s. Its many uses in natural medicine have been validated by scientific research. Several studies by different researchers demonstrated that the bark as well as the leaves had hypotensive, antispasmodic, anticonvulsant, vasodilator, smooth-muscle relaxant, and cardiodepressant activities in animals. Researchers verified graviola leaf’s hypotensive properties in rats again in 1991. Several studies over the years have demonstrated that leaf, bark, root, stem, and seed extracts of graviola are antibacterial in vitro against numerous pathogens, and that the bark has antifungal properties. Graviola seeds demonstrated active antiparasitic properties in a 1991 study, and a leaf extract showed to be active against malaria in two other studies (in 1990 and 1993). The leaves, root, and seeds of graviola demonstrated insecticidal properties, with the seeds demonstrating strong insecticidal activity in an early 1940 study. In a 1997 clinical study, novel alkaloids found in graviola fruit exhibited antidepressive effects in animals.

In a 1976 plant screening program by the National Cancer Institute, graviola leaves and stem showed active cytotoxicity against cancer cells and researchers have been following up on these findings since. Much of the cancer research on graviola focuses on a novel set of phyto-chemicals called Annonaceous acetogenins. Graviola produces these natural compounds in its leaf and stem, bark, and fruit seeds. Three separate research groups have isolated these acetogenin compounds in graviola which have demonstrated significant antitumorous and anticancerous properties, and selective toxicity against various types of cancer cells (without harming healthy cells) publishing eight clinical studies on their findings. Many of the acetogenins have demonstrated selective toxicity to tumor cells at very low dosages–as little as 1 part per million. Four studies were published in 1998 which further specify phytochemicals and acetogenins which are demonstrating the strongest anticancerous, antitumorous, and antiviral properties. Thus far, specific acetogenins in graviola have been reported to be selectively toxic to these types of tumor cells: lung carcinoma cell lines; human breast solid tumor lines; prostate adenocarcinoma; pancreatic carcinoma cell lines; colon adenocarcinoma cell lines; liver cancer cell lines; human lymphoma cell lines; and multi-drug resistant human breast adenocarcinoma.

Annonaceous acetogenins can selectively inhibit the growth of cancerous cells and also inhibit the growth of adriamycin resistant tumor cells.

Annonaceous acetogenins are only found in the Annonaceae family (to which graviola belongs). In general, various Annonaceous acetogenins in the plant family have been documented with antitumorous, antiparasitic, pesticidal, antiprotozoal, antifeedant, anthelmintic, and antimicrobial activities. Mode of action studies in three separate laboratories have recently determined that these acetogenins are superb inhibitors of enzyme processes that are only found in the membranes of cancerous tumor cells. Purdue University, in West Lafayette, Indiana, has conducted a great deal of the research on the acetogenins, much of which has been funded by The National Cancer Institute and/or the National Institute of Health (NIH). Thus far, Purdue University and/or its staff have filed at least nine U.S. and/or international patents on their work around the antitumorous and insecticidal properties and uses of these acetogenins. In one of their reviews, titled “Recent Advances in Annonaceous Acetogenins,” they state, “Recently, we reported that the Annonaceous acetogenins can selectively inhibit the growth of cancerous cells and also inhibit the growth of adriamycin resistant tumor cells. As more acetogenins have been isolated and additional cytotoxicity assays have been conducted, we have noticed that, although most of acetogenins have high potencies among several solid human tumor cell lines, some of the derivatives within the different structural types and some positional isomers showed remarkable selectivities among certain cell lines; e.g., against prostate cancer (PC-3). We now understand the primary modes of action for the acetogenins. They are potent inhibitors of NADH: ubiquinone oxidoreductase, which is in an essential enzyme in complex I leading to oxidative phosphorylation in mitochondria. A recent report showed that they act directly at the ubiquinone-catalytic site(s) within complex I and in microbial glucose dehydrogenase. They also inhibit the ubiquinone-linked NADH oxidase that is peculiar to the plasma membranes of cancerous cells.”

In 1997, Purdue University published information with promising news that several of the Annonaceous acetogenins ” . . . not only are effective in killing tumors that have proven resistant to anticancer agents, but also seem to have a special affinity for such resistant cells.” In several interviews after this information was publicized, the head pharmacologist in Purdue’s research explained how this worked. As he explains it, cancer cells that survive chemotherapy can develop resistance to the agent originally used as well as to other, even unrelated, drugs. This phenomenon is called multi-drug resistance (MDR). One of the ways that cancer cells develop resistance to chemotherapy drugs is by creating an intercellular efflux pump called a P-glycoprotein mediated pump. These types of pumps are capable of pushing anticancer agents out of the cell before they can kill it. On average, only about two percent of the cancer cells in any given person might develop this pump–but they are the two percent that can eventually grow and expand to create multi-drug-resistant tumors. Some of the latest research on acetogenins reported that they were capable of shutting down these intercellular pumps, thereby killing MDR tumors. Purdue researchers reported that the acetogenins preferentially killed multi-drug-resistant cancer cells by blocking the transfer of ATP–the chief source of cellular energy–into them. A tumor cell needs energy to grow and reproduce, and a great deal more to run its pump and expel attacking agents. By inhibiting energy to the cell, it can no longer run its pump. When acetogenins block ATP to the tumor cell over time, the cell no longer has enough energy to operate sustaining processes–and it dies. Normal cells seldom develop such a pump; therefore, they don’t require large amounts of energy to run a pump and, generally, are not adversely affected by ATP inhibitors. Purdue researchers reported that 14 different acetogenins tested thus far demonstrate potent ATP blocking properties (including several found only in graviola). They also reported that 13 of these 14 acetogenins tested were more potent against MDR breast cancer cells than all three of the standard drugs (adriamycin, vincristine, and vinblastine) they used as controls.

An interesting in vivo study was published in March of 2002 by researchers in Japan, who were studying various acetogenins found in several species of plants. They inoculated mice with Lewis lung carcinoma cancer cells. One third received nothing, one third received the chemotherapy drug adriamycin, and one third received the main graviola acetogenin, annonacin (at a dosage of 10 mg/kg). At the end of two weeks, five of the six in the untreated control group were still alive and lung tumor sizes were then measured. The adriamycin group showed a 54.6% reduction of tumor mass over the control group–but 50% of the animals had died from toxicity (three of six). The mice receiving annonacin were all still alive, and the tumors were inhibited by 57.9%–slightly better than adriamycin–and without toxicity. This led the researchers to summarize; “This suggested that annonacin was less toxic in mice. On considering the antitumor activity and toxicity, annonacin might be used as a lead to develop a potential anticancer agent.” Its important to note, however, that annonacin only inhibited the normal growth of the lung tumors during this two-week period; it did not eradicate the tumors nor stop their growth altogether.

Cancer research is ongoing on these important plants and plant chemicals, as several pharmaceutical companies and universities continue to research, test, patent, and attempt to synthesize these chemicals into new chemotherapeutic drugs. In addition, researchers have reported that NADH dehydrogenase inhibitors can suppress HIV infection. As this is a familiar property of Annonaceous acetogenins, several acetogenins found in graviola and other Annona plants have been submitted to the NIH anti-AIDS screening program by Purdue University; research work is continuing in this area as well.

One researcher summarized his work eloquently: “At the time of preparation (August 1998) of this current review, over 350 Annonaceous acetogenins have been isolated from 37 species. Our preliminary efforts show that about 50%, of over 80 Annonaceous species screened, are significantly bioactive and are worthy of fractionation; thus, this class of compounds can be expected to continue to grow at an exponential rate in the future, provided that financial support for such research efforts can be found. With the demise of the world’s tropical rain forests, such work is compelling before the great chemical diversity, contained within these endangered species, is lost.” Perhaps–if enough people believe that the possible cure for cancer or AIDS truly is locked away in a rainforest plant–we will take the steps needed to protect our remaining rainforests from destruction.


Traditional Remedy

The therapeutic dosage is reported to be 5-7 grams daily in capsules or tablets (in 3-4 divided dosages). A standard infusion (one cup 2-3 times daily) or a 4:1 standard tincture (2-4 ml three times daily) can be substituted if desired.


Graviola has demonstrated uterine stimulant activity in an animal study (rats) and should therefore not be used during pregnancy.

 Graviola has demonstrated hypotensive, vasodilator, and cardiodepressant activities in animal studies and is contraindicated for people with low blood pressure. People taking antihypertensive drugs should check with their doctors before taking graviola and monitor their blood pressure accordingly (as medications may need adjusting).

Graviola has demonstrated significant in vitro antimicrobial properties. Chronic, long-term use of this plant may lead to die-off of friendly bacteria in the digestive tract due to its antimicrobial properties. Supplementing the diet with probiotics and digestive enzymes is advisable if this plant is used for longer than 30 days.

Graviola has demonstrated emetic properties in one animal study with pigs. Large single dosages may cause nausea or vomiting. Reduce the usage accordingly if this occurs.

One study with rats given a stem-bark extract intragastrically (at 100 mg/kg) reported an increase in dopamine, norepinephrine, and monomine oxidase activity, as well as a inhibition of serotonin release in stress-induced rats. As such, the use of this plant is probably contraindicated in combination with MAO inhibitors and some prescription antidepressants. Check with your doctor first if you are taking prescription antidepressants or MAO inhibitor drugs prior to taking graviola.

 Alcohol extracts of graviola leaf showed no toxicity or side effects in mice at 100 mg/kg; however, at a dosage of 300 mg/kg, a reduction in explorative behavior and mild abdominal constrictions was observed. If sedation or sleepiness occurs, reduce the amount used.

Drug Interactions: None have been reported; however, graviola may potentiate antihypertensive and cardiac depressant drugs. It may potentiate antidepressant drugs and interfere with MAO-inhibitor drugs. See contraindications above.



Rainforests contain an amazing abundance of plant life―over half of the planet’s vegetation. For centuries, tribal shamans have successfully used these botanicals as remedies for various health disorders. Now, scientists have begun to uncover the medicinal qualities of these plants, which offer new approaches to health and healing.

The Healing Power of Rainforest Herbs is a unique guide to these herbs and their uses.



Ethnobotany: Worldwide Uses


Antispasmodic, chill, fever, flu, indigestion, nervousness, palpitation, rash, sedative, skin disease


Asthenia, cataplasm, cicatrizant, cough, diarrhea, emetic, fever, grippe, heart conditions, lactagogue, nervine, parasites, pediculicide, pellagra, sedative, soporific, sore, spasm, stomachic


Antispasmodic, asthenia, asthma, diuretic, fevers, heart conditions, hypertension, lactagogue, nervine, parasites, sedative, vermifuge


Depurative, fainting, flu, galactagogue, high blood pressure, hypertension, insomnia, palpitation, ringworms

West Indies

Asthma, childbirth, diarrhea, hypertension, lactagogue, parasites, worms


Childbirth, gallbladder, nervousness, parturition, sedative, tea, tranquilizer


Astringent, diarrhea, dysentery, fever, liqueur, pectoral, ringworm, scurvy


Anthelmintic, diarrhea, dyspepsia, kidney, piscicide, ulcer (stomach), vermifuge


Abscess, analgesic, anthelmintic, antispasmodic, astringent, bronchitis, calmative, chest problems, cough, diabetes, diarrhea, dysentery, edema, emetic, fever, intestinal colic, liver problems, neuralgia, parasites, rheumatism


Antiparasitic, antispasmodic, catarrh, diabetes, diarrhea, dysentery, fever, hypertension, indigestion, insecticide, lice, liver disorders, sedative, tumors (skin), ulcers (internal)


Astringent, boil, cough, diarrhea, dermatosis, hypertension, rheumatism, styptic


Analgesic, antiphlogistic, arthritis, asthma, astringent, bilious, childbirth, cyanogenetic, diarrhea, dysentery, febrifuge, heart, insecticide, kidney, lactagogue, liver, malaria, pectoral, pediculicide, piscicide, ringworm, scurvy, sedative, stomach, tranquilizer

The above text has been reprinted with permission of the author. It appears on her web site and in her book, Herbal Secrets of the Rainforest, 2nd edition, published and copyrighted by Sage Press, Inc.© 2002 All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval system, including websites, without written permission from Sage Press, Inc. A complete Technical Data Report is available for this plant from Sage Press, Inc.


Feng, P. C., et al. “Pharmacological screening of some West Indian medicinal plants.” J. Pharm. Pharmacol. 1962; 14: 556-61.

Meyer, T. M. “The alkaloids of Annona muricata.” Ing. Ned. Indie. 1941; 8(6): 64.

Carbajal, D., et al. “Pharmacological screening of plant decoctions commonly used in Cuban folk medicine.” J. Ethnopharmacol. 1991; 33(1/2): 21-4.

Misas, C. A. J., et al. “Contribution to the biological evaluation of Cuban plants. IV.” Rev. Cubana Med. Trop. 1979; 31(1): 29-35.

Sundarrao, K., et al. “Preliminary screening of antibacterial and antitumor activities of Papua New Guinean native medicinal plants.” Int. J. Pharmacog. 1993; 31(1): 3-6.

Heinrich, M., et al. “Parasitological and microbiological evaluation of Mixe Indian medicinal plants (Mexico).” J. Ethnopharmacol. 1992; 36(1): 81-5.

Lopez, Abraham A. M. “Plant extracts with cytostatic properties growing in Cuba. I.” Rev. Cubana Med. Trop. 1979; 31(2): 97-104.

Bories, C., et al. “Antiparasitic activity of Annona muricata and Annona cherimolia seeds.” Planta Med. 1991; 57(5): 434-36.

Antoun, M. D., et al. “Screening of the flora of Puerto Rico for potential antimalarial bioactives.” Int. J. Pharmacog. 1993; 31(4): 255-58.

Gbeassor, M., et al. “In vitro antimalarial activity of six medicinal plants.” Phytother. Res. 1990; 4(3): 115-17.

Tattersfield, F., et al. “The insecticidal properties of certain species of Annona and an Indian strain of Mundulea sericea (Supli).” Ann. Appl. Biol. 1940; 27: 262-73.

Hasrat, J. A., et al. “Isoquinoline derivatives isolated from the fruit of Annona muricata as 5-HTergic 5-HT1A receptor agonists in rats: unexploited antidepressive (lead) products.” J. Pharm. Pharmacol. 1997; 49(11): 1145-49.

Anon. Unpublished data, National Cancer Institute. Nat Cancer Inst Central Files (1976). From NAPRALERT Files, University of Illinois, 1995.

Zeng, L., et al. “Five new monotetrahydrofuran ring acetogenins from the leaves of Annona muricata.” J. Nat. Prod. 1996; 59(11): 1035-42.

Rieser, M. J., et al. “Five novel mono-tetrahydrofuran ring acetogenins from the seeds of Annona muricata.” J. Nat. Prod. 1996; 59(2): 100-8.

Wu, F. E., et al. “Additional bioactive acetogenins, annomutacin and (2,4-trans and cis)-10R-annonacin-A-ones, from the leaves of Annona muricata.” J. Nat. Prod. 1995; 58(9): 1430-37.

Wu, F. E., et al. “New bioactive monotetrahydrofuran Annonaceous acetogenins, annomuricin C and muricatocin C, from the leaves of Annona muricata.” J. Nat. Prod. 1995; 58(6): 909-15.

Wu, F. E., et al. “Muricatocins A and B, two new bioactive monotetrahydrofuran Annonaceous acetogenins from the leaves of Annona muricata.” J. Nat. Prod. 1995; 58(6): 902-8.

Wu, F. E., et al. “Two new cytotoxic monotetrahydrofuran Annonaceous acetogenins, annomuricins A and B, from the leaves of Annona muricata.” J. Nat. Prod. 1995; 58(6): 830-36.

Rieser, M. J., et al. “Bioactive single-ring acetogenins from seed extracts of Annona muricata.” Planta Med. 1993; 59(1): 91-2.

Rieser, M. J., et al. “Muricatacin: a simple biologically active acetogenin derivative from the seeds of Annona muricata (Annonaceae)” Tetrahedron Lett. 1991; 32(9):1137-40.

Kim, G. S., et al. “Muricoreacin and murihexocin C, mono-tetrahydrofuran acetogenins, from the leaves of Annona muricata. Phytochemistry 1998; 49(2): 565-71.

Padma, P., et al. “Effect of the extract of Annona muricata and Petunia nyctaginiflora on Herpes simplex virus. J. Ethnopharmacol. 1998; 61(1): 81-3.

Gleye, C., et al. “Cis-monotetrahydrofuran acetogenins from the roots of Annona muricata 1. J. Nat. Prod. 1998; 61(5): 576-9.

Kim, G. S., et al. “Two new mono-tetrahydrofuran ring acetogenins, annomuricin E and muricapentocin, from the leaves of Annona muricata.” J. Nat. Prod. 1998; 61(4): 432-36.

Woo M.H., et al. “Cis-Annonacin and (2,4)-cis-and trans-isoannonacins: cytotoxic monotetrahydrofuran annonaceous acetogenins from the seeds of Annona cherimolia.” Arch. Pharm. Res. 1999 Oct;22(5):524-8.

Liaw, C. C., et al. “New cytotoxic monotetrahydrofuran Annonaceous acetogenins from Annona muricata.” J. Nat. Prod. 2002; 65(4): 470-75.

Chang, F. R., et al. “Novel cytotoxic annonaceous acetogenins from Annona muricata.” J. Nat. Prod. 2001; 64(7): 925-31.

Jaramillo, M. C., et al. “Cytotoxicity and antileishmanial activity of Annona muricata pericarp.” Fitoterapia 2000; 71(2): 183-6.

Betancur-Galvis, L., et al. “Antitumor and antiviral activity of Colombian medicinal lant extracts.” Mem. Inst. Oswaldo Cruz 1999; 94(4): 531-35.

Oberlies, N. H., et al. “Structure-activity relationships of diverse Annonaceous acetogenins against multidrug resistant human mammary adenocarcinoma (MCF-7/Adr) cells.” J. Med. Chem.; 40(13):2102-6 1997.

Keinan, E., et al. “Antibody-catalyzed organic and organometallic transformations and chemical libraries of Annonaceous acetogenins.” The Skaggs Institute for Chemical Biology Scientific Report 1997-1998.

Zeng, L., et al., “Recent advances in Annonaceous acetogenins.” Nat. Prod Rep. 1996; 13(4): 275-306.

Anon., Purdue News September 1997; Purdue University, West Lafayette, IN.

Feras, Q., et al. “Annonaceous acetogenins: Recent progress.” J. Nat. Prod. 1999; 62(3): 504-540.

Wang, L. Q., et al. “Annonaceous acetogenins from the leaves of Annona montana.” Bioorg. Med. Chem. 2002; 10(3): 561-65.

Padma, P., et al. “Effect of Annona muricata and Polyalthia cerasoides on brain neurotransmitters and enzyme monoamine oxidase following cold immobilization stress.” J. Natural Remedies 2001; 1(2): 144-46.

N’gouemo, P., et al. “Effects of ethanol extract of Annona muricata on pentylenetetrazol-induced convulsive seizures in mice.” Phytother. Res. 1997; 11(3): 243-45.

Image Credits

Graviola Fruit
Dreamstime ID 101742412
© Inna Kyselova
Annona muricata Fruit


Soursop Juice
Dreamstime ID 90621781
© Phong Giap

Soursop Fruit on Tree
Dreamstime ID 55829897
© Viktoriia Zlobina

Cook Islander Explaining Graviola
Dreamstime ID 112012852
© Rafael Ben Ari
Eco Tour in Rarotonga

Many experts throughout history have regarded cancer salves and pastes as the most thorough, safe, and efficacious way to treat cancer, especially skin and breast cancers but also cancers of other organs. In this book, Ingrid Naiman meticulously traces the use of such products in ancient India and by Hildegard of Bingen, Native Americans, and modern physicians. She provides detailed instructions for making and using the salves, a fair comparison of the pros and cons, and eight pages of color pictures showing responses to the products. Visit her Cancer Salves site for more information, answers to frequently asked questions, and a checklist for people facing cancer.



Cancer Plants


Your donations are greatly appreciated.


To be notified of new posts to this site, please subscribe, using the link button below. You can cancel your subscription at any time you choose.

13 + 15 =

Copyright by Dr. Ingrid Naiman 2003 and 2018
All Rights Reserved || Institute for Invisible Epidemics