Vitamin A raw khoom

Vitamin A yog ib tug rog soluble vitamin, ib tug organic compound nrog cov tshuaj formula C20H30O. Nws ruaj khov rau cua sov, kua qaub, thiab alkali, thiab yooj yim oxidized. Ultraviolet hluav taws xob tuaj yeem txhawb nqa nws cov oxidative puas tsuaj. Vitamin A muaj xws li A1 thiab A2, nrog A1 yog retinol. Cov khoom noj uas muaj vitamin A siab muaj xws li nqaij qaib thiab tsiaj lub siab, qe qe, thiab mis hmoov. Carotenoids tuaj yeem hloov mus rau hauv vitamin A hauv cov hnyuv mucosa. Liab daj thiab tsaus ntsuab zaub, nrog rau txiv hmab txiv ntoo, muaj carotenoids siab.

1. Vitamin A yog ib qho tseem ceeb ntawm lub qhov muag vim nws tuaj yeem tiv thaiv qhov muag thiab muaj txiaj ntsig zoo rau cov ntaub so ntswg qhov muag, tuaj yeem kho cov kab mob ntawm qhov muag.

2. Vitamin A tuaj yeem tswj cov tawv nqaij noj qab haus huv, kho cov tsos mob xws li khaus thiab qhuav, thiab tiv thaiv cov tawv nqaij flaking.

3. Vitamin A tseem tuaj yeem txhawb txoj kev loj hlob, vim nws pab cov pob txha nqus calcium thiab tiv thaiv kev poob calcium, yog li ua lub luag haujlwm txhawb kev loj hlob.

4. Vitamin A pab tswj lub cev tsis muaj zog ua haujlwm, ntxiv dag zog rau lub cev tiv thaiv kab mob, tshwj xeeb tshaj yog cov kab mob ua pa thiab kab mob parasitic, thiab pab kho mob emphysema thiab hyperthyroidism.

5. Vitamin A muaj feem xyuam rau kev tswj cov noob los ntawm retinol, uas kuj ua raws li cov tshuaj hormones steroid, txhawb cov synthesis ntawm glycoproteins, txhawb kev loj hlob thiab kev loj hlob, ntxiv dag zog rau cov pob txha, thiab tswj kev noj qab haus huv ntawm cov plaub hau, hniav, thiab cov pos hniav.

• Vitamin A tuaj yeem nyob ruaj khov hauv qhov kub thiab txias thiab alkaline ib puag ncig, thiab tsis yooj yim puas thaum lub sij hawm ua noj ua haus. Txawm li cas los xij, vitamin A yog qhov ua rau muaj kev hloov pauv ntawm oxidative conformational, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias, thiab raug ultraviolet hluav taws xob tuaj yeem ua rau qhov kev puas tsuaj oxidative. Yog li ntawd, txhawm rau tswj nws cov txiaj ntsig, nws yuav tsum tau muab cia rau hauv qhov chaw tsaus thiab qhov kub thiab txias.
• Vitamin A ua si ntau yam haujlwm tseem ceeb hauv lub cev hauv tib neeg lub cev, suav nrog kev tswj xyuas lub zeem muag, txhawb kev loj hlob thiab kev loj hlob, txhim kho kev tiv thaiv kab mob, thiab tswj kev noj qab haus huv ntawm daim tawv nqaij thiab mucosal. Nws koom nrog cov synthesis ntawm rhodopsin, uas pab tiv thaiv qhov muag tsis pom kev hmo ntuj thiab tsis pom kev, thiab tseem ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm cov hlwb epithelial.

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