Mavitamini ayenera kuperekedwa tsiku ndi tsiku kuti azichita bwino. Amatha kupezeka ku zakudya zopangidwa ndi mankhwala osokoneza bongo.
Kodi mavitamini othandiza ali othandiza?
Mikangano pa mutu uwu siinathe kwa zaka zambiri. Akatswiri ena amati "chemistry" siingathandize thupi, pamene ena amakhulupirira zosiyana. Pali lingaliro lakuti mavitamini opangira, opangidwa ndi kuyeretsedwa kwakukulu, ndi othandiza komanso amathandiza kwambiri thupi. Ubwino umaphatikizansopo kuti zonse zomwe zingayambitse zozizira zimachotsedwa kwathunthu ku mankhwala.
Kwa anthu ambiri, zokhudzana ndi ubwino ndi zovulaza za mavitamini opangidwabe sadziwika. Kudziwa koteroko kungayambitse mavuto aakulu, monga momwe zochitika zatsopano zakhalira zotsatira zochititsa mantha - kugwiritsa ntchito mopitirira muyeso mavitamini opangidwa ndiwopseza ndikumachepetsa kuchepetsa moyo, izi sizimagwirizana ndi chirengedwe. Zinthu zopangidwa ndi ntchito yaitali zimapangitsa kuti thupi liime popanda kuthandizira kulimbana ndi mavairasi ndi matenda. Kugwiritsa ntchito vitamini A mopitirira muyeso kumayambitsa matenda a chiwindi ndi mutu. Vitamini D wambiri ukhoza kuyambitsa mavuto a impso ndi mtima, ndipo mavitamini E ochulukirapo amakhudza kwambiri mimba ndipo imayambitsa chizungulire. Kawirikawiri, mavitamini angapangidwe akhoza kudyedwa, koma aziwalamula okha ndi kupereka mlingo woyenera dokotala.
Kusiyanitsa pakati pa mavitamini opangidwa ndi chirengedwe ndi chifukwa chakuti iwo ali, "kutalikirana" ndipo zamoyo zimatha kuzizindikira izo pokha pothandizidwa ndi zinthu zina. Mavitamini ena samangotengedwa kapena kusungidwa, kapena amabadwa mwachibadwa. Anthu ambiri akufuna kudziwa momwe angasiyanitsire mavitamini opangidwa kuchokera ku zachilengedwe popanda kuyesa ma laboratory? Pali njira yotulukira kunja - yang'anani phukusi ndipo ngati zinthuzo siziri zachilendo, ndiye kuti mankhwalawa ayenera "kutengedwa ndi maphunziro" kapena "kupuma kwa mwezi".