waa maxay vitamin d
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Faytamiin D waa koox fiitamiino ah oo dufan ku milma oo door muhiim ah ka ciyaara nidaaminta kalsiyum iyo dheef-shiid kiimikaad fosfooraska ee jirka. Waxaa jira laba nooc oo waaweyn oo fitamiin D ah: fitamiin D2 (ergocalciferol) iyo fitamiin D3 (cholecalciferol).
Faytamiin D waxa uu gaar u yahay in laga soo saari karo jidhka marka maqaarku la kulmo iftiinka qorraxda. Gaar ahaan, marka shucaaca UVB ee qorraxda uu ku dhaco maqaarka, molecule loo yaqaan 7-dehydrocholesterol ayaa loo beddelaa fitamiin D3. Faytamiin D waxa kale oo laga heli karaa cuntooyinka qaarkood, oo ay ku jiraan kalluunka dufanka leh, jaallolo, iyo caano la xoojiyay iyo badarka.
Jirka dhexdiisa, fiitamiin D waxa loo beddelaa qaab firfircoon, kaas oo ka caawiya in uu kordhiyo nuugista calcium iyo fosfooraska ee mindhicirka iyo in la habeeyo heerkooda dhiigga. Tani waxay muhiim u tahay ilaalinta lafaha iyo ilkaha caafimaadka qaba, iyo sidoo kale taageeridda shaqada murqaha, shaqada habka difaaca, iyo koritaanka unugyada iyo kala duwanaanta.
Yaraanta fitamiin D-ga waxay u horseedi kartaa dhibaatooyin caafimaad oo kala duwan, oo ay ku jiraan lafaha daciifka ah (osteoporosis), korodhka khatarta jabka, iyo korodhka u nuglaanshaha cudurrada qaarkood. Kaabista fitamiin D-ga ayaa laga yaabaa in lagula taliyo shakhsiyaadka halista ugu jira yaraanta, oo ay ku jiraan kuwa aan helin soo-gaadhista qorraxda ku filan ama aan isticmaalin cuntooyinka hodanka ku ah fitamiin D ku filan.