Nws ntseeg tau tias qhov chaw yug ntawm cov txiv hmab txiv ntoo no yog qhov chaw ntawm Is Nrias teb thiab Burma, lossis hauv Suav teb. Tam sim no loj hlob nyob rau hauv cov teb chaws xws li Sri Lanka, South Is Nrias teb, South Tuam Tshoj thiab ntau lwm lub teb chaws Esxias sab hnub tuaj. Cov txiv hmab txiv ntoo yog puag ncig los yog oval nyob rau hauv cov duab nrog translucent nqaij thiab tsuas muaj ib tug dub noob. Longan tsob ntoo belongs rau evergreen, loj hlob ntawm qhov siab ntawm 9-12 meters. Longan yog nplua nuj nyob rau hauv ntau yam vitamins thiab minerals. Muaj cov vitamins B1, B2, B3, nrog rau cov vitamin C, cov zaub mov: hlau, magnesium, silicon. Qhov zoo tshaj plaws ntawm cov protein thiab fiber ntau. 100 g ntawm longan muab lub cev nrog 1,3 g ntawm protein, 83 g dej, 15 g ntawm carbohydrates, 1 g ntawm fiber thiab kwv yees li 60 calories. Xav txog qee qhov txiaj ntsig kev noj qab haus huv ntawm cov txiv hmab txiv ntoo longan:
- Paub txog nws txoj kev kho mob ntawm cov teeb meem plab. Longan pab nrog mob plab, txhawb kev tiv thaiv kab mob, uas tso cai rau lub cev tawm tsam ntau yam kab mob.
- Nws muaj txiaj ntsig zoo rau kev ua haujlwm ntawm cov hlab plawv, nrog rau lub plawv.
- Ib qho tshuaj zoo rau ntshav qab zib, vim nws pab lub cev nqus hlau.
- Cov nplooj ntawm tsob ntoo longan muaj quercetin, uas muaj cov tshuaj tua kab mob thiab antioxidant. Siv rau hauv kev kho mob ntawm ntau yam mob qog noj ntshav, kev ua xua, hauv kev kho mob plawv thiab ntshav qab zib.
- Longan txhim kho kev ua haujlwm ntawm cov hlab ntsha, calms lub paj hlwb.
- Lub hauv paus ntawm cov txiv hmab txiv ntoo muaj cov rog, tannins thiab saponins, uas ua raws li tus neeg sawv cev hemostatic.
- Longan kuj yog nplua nuj nyob rau hauv phenolic acid, uas ua raws li ib tug haib antioxidant thiab muaj antifungal, antiviral, thiab antibacterial zog.