How used all over the world! I will send a short piece about the fruit

Psidium guajava (Guava / Kuawa) 

Psidium guajava (Guava / Kuawa)PLANT NAME: Psidium guajava

SIMILARLY USED SPECIESPsidium guajava, P. aromaticum, P. cuajavas, P. pomiferum, P. pyriferum.

COMMON NAMES: Guava, Kuawa, Puawa, [Hawai’i] Ku’ava [Samoa] Kuava [Tonga] Tuava [Marquesas] Kautonga [Niue], Goiaba [Brasil],  Guayaba [Bolivia] Sawintu [Aymara] Saylla [Quechua] Amba [Nepal]

FAMILY: Myrtaceae.

CATEGORY: Herbs that Stabilize and Bind ~.


PLANT PART USED: Whole plant, but mostly the fruit and leaves. The fresh leaves are stronger than the dried ones.

TOXICITY: LD50 (leaf extract) is more than 5 g:kg, p.o.

CAUTIONS AND CONTRAINDICATIONS: Not in pregnancy. Not with edema. Not in large doses. Large doses can cause stomach pain, damage the stomach lining, and cause constipation. Extreme caution in acute diarrhea: be sure any pathogens are expelled before astringing.

STATUS IN HAWAI’I: Invasive alien and pest in Hawai’i, creating mono stands and crowding out native species. Although in Hämakua, former native forest (led by Psychotria mariniana – köpiko) is reclaiming former cattle pasture infested with guava.

WESTERN FUNCTIONS REPORTED: Antiseptic [Haiti]; astringent [England, Ghana, Haiti, Philippines, Tahiti, Trinidad, Venezuela]; bactericide [Trinidad]; cicatrizant [Haiti]; dentifrice [Ghana]; depurative [Trinidad]; emmenagogue [Malaya]; hemostat [Haiti]; laxative [Ghana, India]; nauseatonicvermifuge [Johore, Mexico]; vulnerary [Mexico];

1) Stabilizes the middle burner; astringes and harmonizes diarrhea, nausea & vomiting ~
2) Astringes the lower burner: leucorrhea, hot and cold diarrhea ~
3) Stops bleeding (topical and internal)  ~
4) Clears damp heat in the mouth: leaves chewed for bad breath ~
5) Stops sweating: for yin or qi deficient sweating ~

PREPARATION OF MEDICINE: Generally infused or short decoction. Leaf buds sometimes are eaten. All parts of the plant are astringent with the exception of the ripe fruit.

DOSAGE: Bark 1.5″ by 3″ boiled in 3 cups water for 10 minutes. 1 cup of leaves in 3 cups of boiling water, steeped. 3-5 leaf buds, eaten. 
Guava Common Medicinal Uses

  • Bleeding
  • Diarrhea
  • Injuries

Guava Cross-Cultural Medicinal UsesCOSMETIC

  • To close the pores after a facial [Hawai’i]


  • Varicose veins [Bolivia (leaves tinctured)]


  • Dermatosis; psoriasis [Bolivia (bark infused)];  
  • Itching, scabies [Haiti, Mexico]
  • Rashes [Bolivia (bark infused), Samoa]
  • Wounds, sores & ulcers [Haiti, India, Philippines, Bolivia, Mexico]


  • Diarrhea [Universal]; dysentery [Ghana, Haiti, Panama, Trinidad, Venezuela]
  • Indigestion [Cuba]
  • Nausea & vomiting [Bolivia (cortex decocted), Nepal, South America (bark as tea)]; sea sickness, motion sickness [Hawai’i, Samoa]
  • Stomachache [Johore, Samoa, Haiti, Mexico, Tonga]; abdominal cramping [Bolivia]
  • Sudden weight loss


  • Used to lower blood sugar.


  • Conjunctivitis [South America (flowers mashed topical)], eye strain [South America (flowers mashed topical)]
  • Deafness [Malaya, Mexico]
  • Gingivitis, mouth sores and bleeding gums [Bolivia, South America (infused)], bad breath [South America (leaves chewed)], sore throat [Haiti, South America (bark as tea)]
  • Nose bleed [Philipines (leaves rolled and inserted in nostril)]
  • Toothache [Ghana, Philipines (young leaves chewed)]


  • Jaundice


  • Cholera [Nepal (decocted)]
  • Common cold [Cuba, South America (bark as tea)],
  • Fever


  • Rheumatism, spasms, inflammation of the joints [Bolivia]
  • Sprains [Old Hawai’i], injuries [South America (flowers mashed topical)]; swelling [Java, Mexico]
  • Wounds [Old Hawai’i, Philippines (leaves poulticed or decocted, topical)]


  • Epilepsy [Haiti, Malaya] chorea, convulsions
  • Inflammation of the nerves [Bolivia (wood infused)]


  • Colic
  • Diarrhea and loose bowels [Old Hawai’i (buds chewed and given to children)]
  • To heal circumcisions [Philipines]


  • Evil-Eye [New Zealand]
  • Hysteria [Malaya]
  • Nervous exhaustion [Bolivia (syrup with guava fruit and honey)]


  • Impotence [Bolivia (syrup with guava fruit and honey)]
  • Leucorrhea and stretched vagina after childbirth [Java, Bolivia (douche)]
  • Miscarriage; uterine bleeding; premature labor; painful menstruation [Samoa]
  • Post partum [Cook Islands (new mothers bathed in warm infusion of guava leaves)]
  • “Sexual weakness” [Bolivia (flowers infused or syrup with guava fruit and honey)]


  • Nephritis


  • Bronchitisphlegm [Holland]; cough [Ghana, Samoa]


  • Incontinence


  • Diarrhea in dogs [Trinidad and Tobago


  • Edema [Dominican Republic]
  • Hangovers [South America (leaves chewed prophylacticly)]

USE AS FOOD: The fruit. Guava fruit is “thermostable”; it can survive processing.

OTHER USES: Wood makes good sweat lodges.

CONSTITUENTS: Up to 10% tannin content by dry weight. [Whistler 1992] One guava fruit has 2-5 times the vitamin C of an orange. [Arvigo 2001]
Alanine, alpha-humulene, alpha-linolenic-acid, alpha-selinene, araban, arabinose, arginine, ascorbic-acid, ascorbigen, aspartic-acid, benzaldehyde, benzene, beta-bisabolene, beta-carotene, beta-caryophyllene, beta-copaene, beta-farnesene, beta-humulene, beta-ionone, beta-pinene, beta-selinene, butanal, calcium, cinnamylacetate, citral, citric-acid, copper, d-galactose, d-galacturonic-acid, delta-cadinene, ellagic-acid, essential oil rich in cineol (leaves) , flavonoids (leaves): quercetin, 3-L-4-arabinofuranoside and 3-L-4-pyranoside, four triterpenic acids (leaves), fructose, gallic-acid, glutamic-acid, glycine, histidine, iron, isoleucine, l-malic-acid, lactic-acid, leucine, leucocyanidins, limonene, linoleic-acid, lysine, magnesium, manganese, mecocyanin, methylcinnamate, methylisopropylketone, mufa, myristic-acid, niacin, oleic-acid, oxalic-acid, palmitic-acid, palmitoleic-acid, pantothenic-acid, pectin, phenylalanine, phosphorus, phytin-phosphorus, potassium, proline, pufa, quercetin & 6 quercetin derivatives (-3-glucoside, -3-galactoside, 3-xyloside, 3-arabinopyranoside, , -3-arabinofuranoside and -3-rhamnoside), rhamnose, riboflavin, serine, sfa, stearic-acid, sulfur, tannins, thiamin, threonine, tryptophan, tyrosine, ursolic and oleanolic acids (leaves), valine, vit-b-6, xylose, zinc.
Guava Local CombinationsCuts, sprains, contusions: Add Tephrosia piscatoria  (pia), coconut leaves, Verbena littoralis (haoui), Saccarum granorum (kö / sugar cane), and Pa’akai (Hawaiian salt) topical for deep cuts, sprains and broken bones. See [HHM] for recipe.
Internal bleeding: Roots with Pandanus tectorius (hala) shoots and Musa paradisica (banana / mai’a) roots, mashes and boiled for internal bleeding. One mouthful per dose. [Old Hawai’i]
CROSS CULTURAL COMBINATIONSPlease note some of the ingredients in the following combinations are toxic!
Do not self-administer without the supervision of a licensed practitioner or an experienced Elder
.Diarrhea: with Citharexylum spinosum [Caribbean]
Enteritis, colitis & arthritis: fruit peel with two Siempreviva sp. (everlasting) twigs [Bolivia]

HABITAT: Where ever it damn well pleases.

GATHERING: Pick from the uphill side of the road to avoid plant contamination by oil from automobile runoff. Or better yet avoid roads altogether.



  • Anti-amoebic in vitro. [Tona 2000]
  • Leaf and bark extract inhibit growth of amoebas (Entamoeba histolytica) in vitro. [Thaiyooth]
  • Methanol and ethanol extracts inhibit gram-positive bacteria in vitro. [Biswas 2013]
  • Water extract decreased cough in animals by 35-54%, but was not as effective as dextromethorphan, which decreased cough by 78%. [Jaiari 1999]


  • Hawaiians recognized 3 varieties of Psidium guajava: Kuawa lemi (lemon guava), Kuawa momona (with thicker skin and larger seeds than Kuawa lemi), and Kuawa keokeo (white guava).
  • Originally domesticated in Peru thousands of years ago, guava was first introduced to Hawai’i by Spaniard Don Marin sometime after 1791.

Arvigo, Rosita and Nadine Epstein. 2001. Rainforest Home Remedies : The Maya Way To Heal Your Body and Replenish Your Soul. San Francisco: Harper

Bista, M. S., director. 1997. Medicinal Plants of Nepal. 5th ed. Kathmandu: His Majesty’s Government, Ministry of Forests and Soil Conservation, Department of Natural Resources.

Biswas et al. 2013. Antimicrobial Activities of Leaf Extracts of Guava (Psidium guajava L.) on Two Gram-Negative and Gram-Positive Bacteria. International Journal of Microbiology Volume 2013

Enciclopedia Boliviana

Jaiarj P, Khoohaswan P et al. 1999. Anticough and antimicrobial activities of Psidium guajava Linn. Leaf extract. Journal of Ethnopharmacology 67, 203-212

Kaaiakamanu, D. M. 1922. Hawaiian Herbs of Medicinal Value. (Trans. by Akaiko Akana) Rutland, VT.: Charles E. Tuttle Company]

Krauss, Beatrice. Notes from Beatrice Krauss’ Ethnobotany class at the University of Hawai’i.

Lans C, Harper T, et al. 2000. Medicinal plants used for dogs in Trinidad and Tobago. Prev Vet Med Jun 12;45(3-4):201-20

Lyons Kapi’ioho Naone

Penelope N. Honychurch, Caribbean Wild Plants

Thaiyooth Chintana. A comparative study on the effects of leaves and barks of Psidium guajava Linn. on Entamoeba histolytica. Department of Protozoology, Faculty of Tropical Medicine, Mahidol
University, Bangkok

Tona L, Kambu K, et al. 2000. Antiamoebic and spasmolytic activities of extracts from some antidiarrhoeal
traditional preparations used in Kinshasa, Congo. Phytomedicine Mar;7(1):31-8

Whistler, W. Arthur. 1992. Polynesian Herbal Medicine. Lawai, HI.: National Tropical Botanical Garden

Whistler, W. Arthur. 1996. Samoan Herbal Medicine. Honolulu: Isle Botanica

ONLINE REFERENCES:, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.] webcite