Kukholakala ukuthi indawo okwazalelwa kuyo lesi sithelo isendaweni ethile phakathi kweNdiya neBurma, noma eChina. Njengamanje ikhule emazweni anjengeSri Lanka, iSouth India, iSouth China nakwamanye amazwe amaningana aseNingizimu-mpumalanga ye-Asia. Isithelo siyindilinga noma simise okweqanda ngenyama ekhanyayo futhi siqukethe imbewu eyodwa kuphela emnyama. Isihlahla se-longan singesohlala siluhlaza, sikhula ngobude obungamamitha ayi-9-12. I-Longan iwumthombo ocebile wamavithamini namaminerali ahlukahlukene. Iqukethe amavithamini B1, B2, B3, kanye novithamini C, amaminerali: insimbi, i-magnesium, i-silicon. Umthombo omuhle kakhulu wakho kokubili amaprotheni kanye ne-fiber. I-100 g ye-longan ihlinzeka umzimba ngo-1,3 g wamaprotheni, ama-83 g wamanzi, u-15 g wama-carbohydrates, i-1 g ye-fiber kanye nama-calories angaba ngu-60. Cabangela ezinye zezinzuzo zezempilo zesithelo se-longan:
- Iyaziwa ngemiphumela yayo yokuphulukisa ezinkingeni zesisu. I-Longan isiza ngobuhlungu besisu, iqinisa isimiso somzimba sokuzivikela, esivumela umzimba ukuba ulwe nezifo ezihlukahlukene.
- Inomphumela onenzuzo ekusebenzeni kwesimiso sokujikeleza kwegazi, kanye nenhliziyo.
- Ikhambi elihle le-anemia, njengoba lisiza umzimba ukumunca insimbi.
- Amaqabunga esihlahla se-longan aqukethe i-quercetin, ene-antiviral kanye ne-antioxidant. Isetshenziswa ekwelapheni izinhlobo ezahlukene zomdlavuza, i-allergies, ekwelapheni izifo zenhliziyo nesifo sikashukela.
- I-Longan ithuthukisa ukusebenza kwezinzwa, ithulisa isimiso sezinzwa.
- I-kernel yesithelo iqukethe amafutha, ama-tannins nama-saponins, asebenza njenge-ejenti ye-hemostatic.
- I-Longan futhi inothile nge-phenolic acid, esebenza njenge-antioxidant enamandla futhi iqukethe izinto ezilwa namagciwane, i-antiviral, kanye ne-antibacterial.