Vitamin A

ʻO nā waiwai kūpono o ka wikamina A

Nui nā hana o ka Vitamin A i loko o ke kino. ʻO ka mea kaulana loa ka hopena ma ka hihiʻo. Lawe ʻia ka ester Retinyl i ka retina, aia i loko o ka maka, kahi i hoʻololi ʻia i waiwai i kapa ʻia 11-cis-retinal. Eia hou, ua hoʻopau ʻo 11-cis-retinal i nā koʻokoʻo (kahi o nā photoreceptors), kahi e hui pū ʻia me ka protein opsin a hana i ka pigment visual "rhodopsin". Hiki i nā koʻokoʻo i loaʻa iā Rhodopsin ke ʻike i nā kukui liʻiliʻi loa, e pono ai no ka ʻike ʻana i ka pō. ʻO ka lawe ʻia ʻana o kahi photon o ka mālamalama catalyzed ka hoʻololi o 11-cis-retinal hoʻi i all-trans retinal a alakaʻi i kona hoʻokuʻu ʻia mai ka protein. Hoʻopuka kēia i kahi kaulahao o nā hanana e alakaʻi ana i ka hanauna o kahi electrochemical hōʻailona i ke aʻalolo optic, i hoʻoponopono ʻia a unuhi ʻia e ka lolo. ʻO ka loaʻa ʻole o Retinol i loaʻa i ka retina e alakaʻi ai i ka hoʻopili pono ʻole ʻana i ka pouli i ʻike ʻia me ka makapō o ka pō.

ʻO ka Wikamina A ma ke ʻano o ka retinoic acid he mea nui i ka hoʻoponopono ʻana i ka hōʻike o ka ʻāpana. I ka manawa e lawe ʻia ai ʻo Retinol e ke kele, hiki ke oxidized ʻia i retinal, kahi e hamo ʻia ai i ka acid retinoic. ʻO ka Retinoic acid kahi moleola ikaika loa e hoʻopaʻa ai i nā ʻenekini nukelea like ʻole e hoʻomaka a kāohi paha i ka hōʻike ʻana o ka ʻāpana. Ma o ke kānāwai o ka hōʻike ʻana o nā gen kikoʻī, hana nui ka acid retinoic i ka hoʻokaʻawale ʻana o ka cell, kekahi o nā hana physiological koʻikoʻi.

Pono ka Vitamin A no ka hana maʻamau o ka ʻōnaehana pale. Pono ka Retinol a me kāna mau metabolites e mālama i ka pono a me ka hana o nā huna o ka ʻili a me nā membrane mucous (respiratory, digestive and urinary system). Kēia mauʻaʻaʻa lawelawe ma ke 'āpana a ʻo ke kino ka laina mua o ka pale no nā maʻi. ʻO ka wikamina A ka mea nui i ka hoʻomohala ʻana a me ka hoʻokaʻawale ʻana i nā hunaola keokeo, nā limapopa, nā mea nui i ka pane o ka ʻōnaehana pale.

Pono ka wikamina A i ka ulu ʻana o ka embryonic, ke lawe pololei nei i ka ulu ʻana o nā lālā, ke kūkulu ʻana o ka puʻuwai, nā maka a me nā pepeiao o ka ʻōpū. Hoʻohui ʻia, hoʻopili ka retinoic acid i ka hōʻike o ka genone ulu ulu. Hiki i nā hemahema a me ka nui o ka wikamina A ke hana i nā kīnā hānau.

Hoʻohana ʻia ka wikamina A no ka hoʻomohala maʻamau o nā hunaola i loko o nā hunaola ʻulaʻula. Hoʻohui ʻia, ʻo ka wikamina A ka mea e hoʻomaikaʻi ai i ka hoʻoliʻiliʻi o ka hao mai nā mālama i ke kino, e kuhikuhi ana iā ia i ka ulu ʻana o ke koko ʻulaʻula. Ma laila, hoʻopili ʻia ka hao i hemoglobin - ka halihali o ka oxygen i nā erythrocytes. Manaʻo ʻia ʻo ka huakine A ka pilina me a ma nā ʻano like ʻole. Hiki i ka hemahema Zinc ke alakaʻi i kahi hōʻemi o ka nui o Retinol i lawe ʻia, kahi hoʻoliʻiliʻi o ka hoʻokuʻu ʻana o Retinol i ke akepaʻa a me kahi hōʻemi o ka hoʻololi ʻana o Retinol i ka retina. Loaʻa ka hopena maikaʻi o ka huakino A i ka hemahema o ka hao (anemia) a hoʻomaikaʻi i ka lawe ʻana o ka hao i nā keiki a me nā wahine hāpai. ʻO ka hui pū ʻana o ka wikamina A a me ka hao e hoʻōla maikaʻi ai ma mua o ka hao a me ka huaora A.

Ua hōʻike ʻia nā noiʻi hou e pono ai ka lāʻau A, carotenoids, a me provitamin A carotenoids i ka pale ʻana i ka ulu ʻana o ka maʻi puʻuwai. Hāʻawi ʻia ka hana antioxidant o ka wikamina A a me nā carotenoids e ke kaulahao hydrophobic o nā polyene unit, i hiki ke kinai i ka oxygen oxygen (molekiola oxygen me nā hana kiʻekiʻe), hoʻopau i nā radical thiyl, a hoʻopaʻa i nā radical peroxyl. I ka pōkole, ʻo ka lōʻihi o ke kaulahao polyene, ʻo ke kiʻekiʻe o ke kūpaʻa o ka radical peroxyl. Ma muli o kā lākou hanana, hiki ke oxidized ka wikamina A a me nā carotenoids ke hoʻonui ʻia ke koʻikoʻi O2 a no laila ʻo ia nā antioxidant maikaʻi loa ma nā kaomi oxygen haʻahaʻa i ʻike ʻia i nā pae physiological i loaʻa i nā pūnaewele. Ma ke ʻano holoʻokoʻa, hōʻike nā hōʻike epidemiological i ka wikamina A a me nā carotenoids he mau kumuʻaiʻai nui i ka hōʻemi ʻana i nā maʻi puʻuwai.

Ua hoʻokūpaʻa ka European Food Safety Authority (EFSA) i ka ʻōlelo ʻepekema i ka poʻe hana politika, ua ʻike ʻia nā keu olakino e hiki mai ana me ka huaʻai A:

• mahele o ka pūnaewele maʻamau;
• ka hoʻomohala maʻamau a me ka hana ʻana o ka ʻōnaehana pale maʻi;
• ka mālama ʻana i ke kūlana maʻamau o ka ʻili a me nā membrane mucous;
• mālama o ka hihiʻo;
• pūnao hao maoli.

He kūlike kiʻekiʻe ko ka wikamina A me nā huaora C a me E a me nā minelala hao a me zinc. Pale nā ​​wikamina C a me E i ka wikamina A mai ka hoʻohaʻahaʻa. Hoʻonui ka wikamina E i ka omo ʻia ʻana o ka wikamina A, akā ma nā hihia wale nō e pau ai ka huaora E i nā mea liʻiliʻi. ʻO kahi maʻi wikamina E kiʻekiʻe i ka papaʻai, a laila, hoʻopilikia i ka lawe ʻana o ka huaora A. Zinc kōkua i ka lawe ʻana o ka wikamina A ma o ke komo ʻana i kāna hoʻololi i Retinol. Hoʻonui ka wikamina A i ka omo ʻana o ka hao a hoʻopili i ka hoʻohana ʻana o ka mālama hao i loko o ke ake.

Hana maikaʻi pū ka Vitamin A me nā huaora D a me K2, magnesium, a me nā momona momona. Hana ka Vitamins A, D a me K2 i synergistically e kākoʻo i ke olakino palekana, paipai i ka ulu kūpono ʻana, mālama i ka iwi a me ke olakino niho, a pale i nā mea palupalu mai ka helu ʻana. Pono ka magnesium no ka hana ʻana i nā protein āpau, me nā mea e launa pū ana me nā huaora A a me D. ʻO ka nui o nā protein i pili i ka metabolism o ka huaora A a me nā mea loaʻa no nā wikamina A a me D e hana pololei wale nō i ke alo o zinc.

Hana pū nā Vitamins A a me D e hoʻoponopono i ka hana ʻana o kekahi mau protein-dependant protein. I ka manawa a ka wikamina K e hoʻoulu ai i kēia mau protein, kōkua lākou i ka mineralize i nā iwi a me nā niho, pale i nā aʻa a me nā mea palupalu ʻē aʻe mai ka helu maʻamau ʻole, a pale aku i ka make o ka cell.

ʻOi aku ka maikaʻi o ka ʻai ʻana i nā meaʻai Vitamin A me nā meaʻai i loaʻa i ka momona "maikaʻi". No ka laʻana, ʻōlelo ʻia e hui pū ʻia ka spinach, kahi kiʻekiʻe o ka vitamin A a me ka lutein. Pēlā nō i ka letus a me nā kāloti, i hele maikaʻi me nā avocados i nā salakeke. Ma ke ʻano maʻamau, ʻo nā huahana holoholona i waiwai i ka vitamina A ua loaʻa i kekahi mau momona, lawa no kona absorption maʻamau. No nā huaʻai a me nā huaʻai, ua ʻōlelo ʻia e hoʻohui i kahi liʻiliʻi o ka aila mea kanu i ka saladi a i ʻole ka wai i kāpīpī hou ʻia - ma kēia ala mākou e maopopo ai e loaʻa i ke kino ka huaora pono i piha.

Pono e hoʻomaopopo ʻia ʻo ke kumu maikaʻi loa o ka vitamina A ma ke ʻano, a me nā mea waiwai ʻē aʻe, he meaʻai kaulike a me nā huahana kūlohelohe, ma mua o nā mea hoʻohui meaʻai. Ke hoʻohana nei i nā huaora i kahi ʻano lāʻau lapaʻau, maʻalahi loa ka hana hewa ʻana me ka dosage a loaʻa i nā mea ʻoi aku ma mua o ka pono o ke kino. Hiki ke loaʻa i nā hopena koʻikoʻi ka hoʻonui ʻana o kekahi a i ʻole kekahi mau huaora a mineral paha i loko o ke kino. Hiki ke piʻi aʻe ka pilikia o ka hoʻomohala ʻana i nā maʻi oncological, ke ʻano o ke ʻano maʻamau o ke kino, hoʻopau ʻia ka metabolism a me ka hana o nā ʻōnaehana. No laila, pono e lawe ʻia ka hoʻohana ʻana i nā huaora i nā papa i ka wā pono a ma hope o ke kūkākūkā ʻana i ke kauka.

Noi i ka lāʻau

Kau ʻia ka ʻai nui o ka wikamina A i nā hihia aʻe:

• no ka hemahema o ka wikamina A, hiki ke hana ʻia i ka poʻe me ka hemahema o ka protein, kahi momona o ka thyroid, fever, ka maʻi ate, cystic fibrosis, a i ʻole kahi maʻi hoʻoilina i kapa ʻia abelatipoproteinemia.
• me ka maʻi ʻaʻai umauma. ʻO nā wahine Premenopausal me ka moʻolelo ʻohana o ka maʻi ʻaʻai umauma e hoʻopau ana i nā kiʻekiʻe o ka wikamina A i kā lākou papaʻai e manaʻo ʻia e hōʻemi i ko lākou makaʻu o ka ulu ʻana i ka maʻi ʻaʻai umauma. ʻAʻole ʻike ʻia inā hopena ka hopena o ka huaora A.
• … Hōʻike ka noiʻi i kahi nui o ka lawe ʻia ʻana o ka wikamina A i ka papaʻai e alakaʻi ai i kahi hōʻemi o ka hoʻomohala ʻana o ka cataract.
• me ka pehu i hoʻokumu ʻia e. ʻO ka lawe ʻana i ka wikamina A me nā lāʻau lapaʻau maʻamau e hōʻemi i ka makaʻu o ka make ʻana mai ka maʻi maʻi i nā keiki i loaʻa i ka maʻi HIV me ka hemahema o ka wikamina A.
• … ʻO ka lawe ʻana i ka wikamina A ma ka waha e hoʻoliʻiliʻi i nā ʻōuli o ka malaria i nā keiki ma lalo o 3 mau makahiki i nā wahi e ʻike mau ai ka malaria.
• … ʻO ka lawe ʻana i ka wikamina A ma ka waha e hoʻoliʻiliʻi i ka makaʻu o nā pilikia a i ʻole ka make ʻana mai ka maʻi ʻula a nā keiki me ka maʻi ʻōpala i nele i ka wikamina A.
• me nā lehelehe precancerous i ka waha (leukoplakia waha). Hōʻike ka noiʻi e hiki i ka lawe ʻana i ka wikamina A ke kōkua i ka mālama ʻana i nā leha premalignant i ka waha.
• ke ola hou mai ke kahakaha ʻana o ka maka laser. ʻO ka lawe ʻana i ka wikamina A waha me ka huaola E hoʻomaikaʻi i ka hoʻōla ma hope o ke kaha ʻana o ka maka laser.
• me nā pilikia ma hope o ka hāpai ʻana. ʻO ka lawe ʻana i ka wikamina A e hoʻēmi i ka makaʻi o ka maʻi diarrhea a me ke kuni ma hope o ka hāpai ʻana i nā wahine ʻai kino ʻole.
• me nā pilikia i ka wā hāpai. ʻO ka lawe ʻana i ka wikamina A e hoʻoliʻiliʻi waha i ka makaʻu o ka make a me ka makapō o ka pō i ka wā hāpai i nā wahine momona.
• no nā maʻi maka e pili ana i ka retina (retinitis pigmentosa). Hōʻike ka noiʻi e hiki i ka lawe ʻana i ka wikamina A ke hoʻolohi i ka holomua o nā maʻi maka e hōʻino ai i ka retina.

ʻO ke ʻano lāʻau o ka lāʻau A hiki ke ʻokoʻa. I ka lāʻau lapaʻau, loaʻa ia i ke ʻano o nā pila, nā kulu no ka lawelawe ʻana i ka waha, nā kulu no ka lawelawe waha ʻana i kahi ʻano aila, nā capsule, ka wai aila no ka hoʻoponopono intramuscular, ka wai aila no ka hoʻoponopono waha, ma ke ʻano o nā papa i uhi ʻia me ke kiʻi ʻoniʻoni. Lawe ʻia ka wikamina A no prophylaxis a no nā lāʻau, e like me ke kānāwai, 10-15 mau minuke ma hope o ka pāʻina ʻana. Lawe ʻia nā hāʻina aila i ka hihia o ka malabsorption i ka maʻi gastrointestinal a i ʻole i nā maʻi nui. I nā hihia kahi e pono ai ka mālama wā lōʻihi, hoʻohui ʻia kahi hopena no ka hoʻopili ʻana intramuscular me nā capsule. I ka lāʻau lapaʻau, ʻōlelo pinepine ʻia ka huaola A i nā International Units. No nā hemahema o ka wikamina ʻoluʻolu a akahai, kauoha ʻia nā mākua 33 International Units i kēlā me kēia lā; me hemeralopia, xerophthalmia - 50-100 tausani IU / lā; keiki - 1-5 tausani IU / lā, kaukaʻi ʻia i ka makahiki; no nā maʻi ʻili no nā mākua - 50-100 tausani IU / lā; keiki - 5-20 tausani IU / lā.

Kūkā ka lāʻau lapaʻau kuʻuna i ka hoʻohana ʻana i ka wikamina A ma ke ʻano he lāʻau no ka ʻili flaky a maikaʻi ʻole. No kēia, koi ʻia e hoʻohana i ka aila iʻa, ka ate, ka aila a me nā hua manu, a me nā mea kanu i waiwai i ka wikamina A - kaʻu, ka ʻaka, nā kāloti. ʻO ka wai kāloti hou i kaomi ʻia me ka hoʻohui o ka kirimalu a me ka aila mea kanu paha kahi lāʻau maikaʻi no ka hemahema. ʻO kekahi lāʻau ʻē aʻe no ka loaʻa ʻana o ka wikamina i manaʻo ʻia he decoction o nā tubers o ka tubbelly tuber - hoʻohana ʻia ia ma ke ʻano he tonic, restorative a me ka agena antirheumatic. ʻO nā hua flax i manaʻo ʻia he waiwai waiwai o ka wikamina A, a me nā mea pono ʻē aʻe, i hoʻohana ʻia ma loko a ma kahi ʻāpana o nā masks, nā hamo a me nā decoctions o waho. Wahi a kekahi mau hōʻike, aia i loko o ka piko o nā kāloti ka nui o nā wikamina A, ʻoi aku ma mua o ka hua. Hiki ke hoʻohana ʻia i ka kuke ʻana, a hana i kahi decoction, i hoʻohana ʻia ma loko ma ke ʻano he papa no hoʻokahi mahina.

ʻImi ʻepekema hou loa e pili ana i ka Wikamina A:

Ua loaʻa i nā kānaka noiʻi ma ke Kula Nui o ke Kulanui ʻo Case Western Reserve ke hiki i ka metabolism i kaohi ʻole ʻia o ka huaora A i loko o ka ʻōpū ke hana i ka hoʻoweliweli weliweli. Kūkulu ka mea i loaʻa i kahi loulou ma waena o nā papaʻai a me nā maʻi inflammatory - a me ka maʻi ʻeha o ka ʻōpū.

Hōʻike ka noiʻi hou e hoʻonui ka vitamina A i ka hana o ka hana ʻana o ka insulina me nā cells-cell. Ua ʻike nā ʻepekema i ka nui o nā receptor beta e hana ana i ka insulin i ka nui o nā receptor ma ko lākou ʻilikai i maʻalahi i ka huaora A. Manaʻo nā kānaka noiʻi ʻo ia no ka mea he mea nui ka wikamina A i ka hoʻomohala ʻana i nā beta beta i nā wā mua o ke ola. , a no ka pololei a me ka hana i ke koena o ke ola, keu hoʻi i ka wā o nā kūlana pathophysiological - ʻo ia hoʻi, me kekahi mau maʻi hōʻeha.

Ua ʻike nā ʻepekema ma ke Kulanui o Lund ma Suedena i kahi hopena i hōʻike mua ʻole ʻia o ka huaora A i ka ulu ʻana o ka embryonic kanaka. Hōʻike kā lākou noiʻi i ka hopena o ka wikamina A i ka hoʻokumu ʻia ʻana o nā hunaola koko. ʻO kahi mole mole i ʻike ʻia ma ke ʻano he retinoic acid kahi huaora A derivative e kōkua i ka hoʻoholo ʻana pehea e hana ai nā ʻano ʻokoʻa o nā mea i loko o kahi ʻōpū ulu.

ʻO ka wikamina A i ka cosmetology

ʻO ia kekahi o nā mea hana nui no ka ʻili olakino a me ke kele. Ke loaʻa iā ʻoe ka nui o ka wikamina, hiki iā ʻoe ke hoʻopoina e pili ana i nā pilikia e like me ka lethargy o ka ʻili, nā kiko makahiki, huehue, maloʻo.

Hiki ke loaʻa maʻalahi ka Vitamin A i kona ʻano maʻemaʻe, i loko o nā lāʻau lapaʻau, ma ke ʻano o nā capsules, nā ʻaila hinu a me nā ampoules. He mea pono e hoʻomanaʻo he mea hana pono kēia, no laila, pono e hoʻohana me ka akahele, a ʻoi aku ka maikaʻi ma hope o 35 mau makahiki. Manaʻo ka poʻe cosmetologists e hana i nā masks i loaʻa ka huaʻa A i ke kau anuanu a hoʻokahi manawa i ka mahina. Inā loaʻa nā contraindications i ka hoʻohana ʻana i ka lāʻau lapaʻau A i ka haku ʻana i nā masks, hiki iā ʻoe ke hoʻololi iā ia me nā huahana kūlohelohe i waiwai i kēia mau huaora - kalina, parsley, spinach, egg yolks, dairy products, pumpkin, carrots, fish oil, limu.

Nui nā papa hana no nā masks me ka huaʻai A. Hoʻohui pinepine lākou i nā mea momona - momona momona momona, kaʻaila kāwaha. Hana maikaʻi ka wikamina A (ka aila aila a me Retinol acetate) me ka wai ʻaloe, ka wai ʻoka a me ka meli. I mea e hoʻopau ai i nā mimiki a me nā ʻūlū ma lalo o nā maka, hiki iā ʻoe ke hoʻohana i ka hui ʻana o ka huaora A a me nā aila mea kanu, a i ʻole ka lāʻau Aevit, i loaʻa i nā huaora A a me nā huaora E. ka lepo, ka wikamina A i kahi ampoule a i ʻole ka nui o ka hamo zinc, i noi ʻia i 2 manawa i ka mahina. I ke alo o nā hopena maʻi, wehe i nā ʻeha a hōʻino i ka ʻili, i kekahi o kāna mau maʻi, pono ʻoe e hōʻole i ka hoʻohana ʻana i nā ʻano huna.

Maikaʻi ka wikamina A no ke olakino kui ke hui ʻia me nā mea ʻē aʻe. ʻO kahi laʻana, hiki iā ʻoe ke hoʻomākaukau i kahi pale maka me nā waiima wai, A, B, a me D, ka ʻaila lima ʻaila, ka wai lemon, a me kahi kulu o ka iodine. Pono e hoʻopili i kēia hui ʻana i ka ʻili o nā lima a me nā pā kui, lomilomi no 20 mau minuke a waiho e omo. ʻO ka hana maʻamau i kēia kaʻina hana e hoʻomaikaʻi i ke kūlana o kou mau kui a me kou mau lima.

ʻAʻole e hoʻowahāwahā ʻia nā hopena o ka wikamina A i ke olakino a me ka nani o ka lauoho. Hiki ke hoʻohui ʻia i nā shampoos (ma mua koke o kēlā me kēia kaʻina hana, i mea e pale aku ai i ka hoʻohaʻahaʻa o ka mea ke hoʻohui ʻia i ka pūʻulu shampoo holoʻokoʻa), i nā masks - e hoʻonui i ka mālamalama, palupalu o ka ikaika o ka lauoho. E like me nā pale maka, koi ʻia ka vitamine A e hui pū ʻia me nā mea hana ʻē aʻe - wikamina E, nā aila like ʻole, decoctions (chamomile, horsetail), (no ka palupalu), mustard a i ʻole ka pepa (e hoʻolalelale i ka ulu ʻana o ka lauoho). Pono e hoʻohana i kēia mau kālā me ke akahele no ka poʻe i maʻi āpau i ka lāʻau pharmacy ʻo A a no ka poʻe nona ka lauoho i maʻalahi i ka momona momona.

ʻO ka Vitamin A i nā holoholona, ​​nā mea kanu a me nā ʻoihana

Loaʻa i loko o ka mauʻu ʻōmaʻomaʻo, alfalfa a me kekahi mau aila iʻa, ka wikamina A, a i kapa ʻia hoʻi ʻo Retinol, kekahi o nā meaola e pono ai no ke olakino o nā manuʻai. ʻO ka hemahema ʻo Wikamina A ke alakaʻi aku nei i ka plumage maikaʻi me ka nāwaliwali, nā maka a me nā nuku, a hiki i kahi o ka pōʻino. ʻO kekahi kumu nui no ka hana ʻana ʻo ka ʻole o ka wikamina A hiki ke hoʻolohi i ka ulu ʻana.

He ola pōkole kā ka Vitamin A a, ʻo ka hopena, ʻaʻohe lawa ka wikamina A. ma hope o ka maʻi a me ke koʻikoʻi, nāwaliwali loa ka ʻōnaehana pale o ka manu. Ma ka hoʻohui ʻana i kahi papa pōkole o ka wikamina A e hānai ai a wai paha, hiki ke pale ʻia ka maʻi hou aku, no ka mea me ka lawa ʻole o ka wikamina A, hiki i nā manu ke hoʻopili ʻia i nā ʻano maʻi ʻino ʻino.

Pono pono ka wikamina A no ka ulu olakino o nā māmela, e mālama i ka makemake maikaʻi, ke olakino a me ka palekana.

Nā waiwai weliweli o ka wikamina A, kona contraindications a me nā ʻōlelo aʻoaʻo

Kūpaʻa ʻo Wikamina A i nā mahana wela, akā luku ʻia i ka lā pono. No laila, e mālama i nā meaʻai momona a me nā lāʻau i loko o kahi pouli.

Nā Hōʻailona o ka Hōʻemi Vitamin A

Kū pinepine ka hemahema ʻo Vitamin A ma muli o ka lawa ʻole o ka lawe ʻana o nā meaʻai kiʻekiʻe i ka wikamina A, beta-carotene a i ʻole nā ​​provitamin A carotenoids; i hoʻohua ʻia i ka wikamina A i ke kino. Ma waho aʻe o nā pilikia papaʻai, hiki ke kuleana nui i ka inu waiʻona a me malabsorption no ka hemahema o ka wikamina A.

ʻO ka hōʻailona mua o ka lawa ʻole o ka wikamina A ka ʻike maka ʻole i ka pouli, a i ʻole ka makapō o ka pō. ʻO ka hemahema o ka wikamina A lōʻihi a lōʻihi paha ke kumu o ka hoʻololi ʻana i nā hunaola o ke kola, a ʻo ia ka mea e hopena ai i nā maʻi maʻi o ka maʻi koli. ʻO ka hemahema Vitamin A ma waena o nā keiki i nā ʻāina kūkulu ke kumu nui o ka makapō.

Hoʻopili pū ʻia ka hemahema ʻo Vitamin A i ka immunodeficiency, e hoʻemi ana i ka hiki ke kaua i nā maʻi. ʻOiai ʻo nā keiki me nā hemahema vitamona A i ʻoi aku ka kiʻekiʻe o ka maʻi hanu a me ka palahī, a ʻoi aku ka nui o ka make ma nā maʻi maʻi (ʻoi loa), ke hoʻohālikelike ʻia me nā keiki e ʻai pono i ka nui o nā huaora A. ulu maikaʻi ʻole a me ka hoʻokumu iwi i nā keiki a me nā ʻōpio. I nā mea puhipaka, hiki i ka nele o ka wikamina A ke kōkua i ka maʻi pulmonary obstructive mau loa (COPD) a me ka empysema, i manaʻo ʻia e hoʻonui ai i ka makaʻu o ka maʻi ʻaʻa maʻi.

Nā hōʻailona o ka huamino nui A

Huʻihuʻi vitamine A hypervitaminosis i hoʻokumu ʻia e nā kiʻekiʻena kiʻekiʻe o Retinol, ka mea i omo wikiwiki ʻia a kipaku ʻia mai ke kino aku, kākaʻikahi loa ia. Pākuʻi ʻia nā ʻōuli me ka nausea, headache, māluhiluhi, nalo o ka makemake ʻole, poni, ʻili maloʻo, a me ka edema cerebral. Aia kekahi mau noiʻi e hōʻoia i ka hoʻolōʻihi ʻia ʻana o ka wikamina A i loko o ke kino e hiki ai ke alakaʻi i ka ulu ʻana o ka osteoporosis. Kekahi synthetic Retinol nā mea loaʻa (e laʻa me tretinate, isotretinoin, tretinoin) hiki ke hana i nā kīnā ʻole i loko o ka embryo a no laila ʻaʻole pono e hoʻohana ʻia i ka wā hāpai a i ʻole ke hoʻāʻo nei e hāpai. I kēlā mau hihia, manaʻo ʻia ʻo beta-carotene ke kumu palekana o ka huaʻai A.

Nā hualoaʻa mai ka Beta-Carotene a me Retinol Efficacy Study (CARET) e hōʻike ana e pono e hōʻalo ʻia ka hoʻolaila wā lōʻihi A (Retinol) a me ka beta-carotene supplementation i ka wā lōʻihi i ka poʻe i pilikia nui i ka maʻi ʻaʻa maʻi, e like me nā mea puhipaka a me nā poʻe i hōʻike i asbestos.

Ka launa pū me nā huahana lāʻau ʻē aʻe

ʻO ka Wikamina A, ka mea i komo i ke kahe o ke koko, hoʻomaka e wāwahi wikiwiki inā nele ke kino i ka lāʻau E. A inā nele ka wikamina B4 (choline), a laila ʻaʻole mālama ʻia ka lāʻau A no ka hana e hiki mai ana. Manaʻo ʻia nā antibiotic e hoʻoliʻiliʻi iki i nā hopena o ka huaora A. Eia hou, hiki i ka wikamina A ke hoʻoikaika i nā hopena o kahi mea i kapa ʻia ʻo isotretinoin a hana i nā hopena ʻino loa.

E heluhelu e pili ana i nā wikamina ʻē aʻe: