Psidium guajava • Goiaba


The goiaba fruit is high in vitamin C and contains appreciable amounts of vitamin A as well. The young sprouts, bark and unripe fruits and perhaps other parts of Psidium guajava are known in traditional medicine to have a variety of properties (1,2). Leaf extracts demonstrated anti-inflammatory and analgesic effects in animals (3). In another study, stem bark extracts showed hypoglycaemic activity in hyperglycaemic rats (4). Furthermore, goiaba extracts were found to act in synergism with antimicrobial drugs against Staphylococcus aureus strains (5), and to have antitumor effects in mice (6).

(1) Mors, WB, Rizzini, CT and Pereira, NA (2000) Medicinal Plants of Brazil. Reference Publications Inc: 501 p.

(2) Estrella, E (1995) Plantas Medicinales Amazonicas: Realidad y Perspectivas. TCA: 302 p.

(3) Ojewole JA (2006) Anti-inflammatory and analgesic effects of Psidium guajava Linn. (Myrtaceae) leaf aqueous extract in rats and mice. Methods Find Exp Clin Pharmacol 28(7): 441-6

(4) Mukhtar HM, Ansari SH, Bhat ZA, Naved T, Singh P (2006) Antidiabetic activity of an ethanol extract obtained from the stem bark of Psidium guajava (Myrtaceae). Pharmazie 61(8): 725-7

(5) Betoni JE, Mantovani RP, Barbosa LN, Di Stasi LC, Fernandes Junior A (2006) Synergism between plant extract and antimicrobial drugs used on Staphylococcus aureus diseases. Mem Inst Oswaldo Cruz 101(4): 387-90

(6) Seo N, Ito T, Wang N, Yao X, Tokura Y, Furukawa F, Takigawa M, Kitanaka S (2005) Anti-allergic Psidium guajava extracts exert an antitumor effect by inhibition of T regulatory cells and resultant augmentation of Th1 cells. Anticancer Res 25(6A): 3763-70


The tree in this picture is known to bear edible fruit that is referred to as "Jambo", and may belong to the family of Myrtaceae.