Mavhitamini, dzimwe nguva anoturikirwa sevhitamini, ishoko chairo mukudya. Ivo vanoreva nhevedzano ye organic komisheni uye ikirasi yekuteedzera organic zvinhu zvinodiwa kuti vanhu nemhuka vachengetedze zvakajairwa physiological mabasa. Yakawanda haigone kugadzirwa nemuviri pachayo uye inofanira kuwanikwa kubva mukudya. Mashoma chete anogona kugadzirwa mumuviri kana kugadzirwa neintestinal microorganisms. Zvinoita basa rakakosha mukukura kwevanhu, metabolism, uye budiriro uye ndechimwe chezvinhu zvitanhatu zvinovaka muviri (makabhohaidhiretsi, mafuta, mapuroteni, zvicherwa, mavhitaminzi, nemvura). Mavhitaminzi haatore chikamu mukuumbwa kwemasero emunhu kana kupa simba kumuviri, asi anotora chikamu mukuita kwebiochemical mumuviri uye kugadzirisa metabolic mabasa emuviri. Kana kudya kwevhitamini kusina kukwana, kuchaita kuti kusaenzana kwemetabolism yevanhu, zvichiita kuti kuderedzwa kwekudzivirira uye kukonzera "kushayikwa kwevhitamini." Kushaikwa kwevhitamini yekutanga kunogona kukonzerwa nekusakwana kwekudya nekuda kwekushaikwa kwevhithamini mukudya kana kuderedzwa kwekudya.
Kushaikwa kwevhitamini yechipiri kunogona kukonzerwa nekuderera kwesimba remuviri kutora mavhitamini, kuwedzera kudiwa kwemavhitamini, kana kukanganiswa kubva kune mamwe madhiragi. Mavhitaminzi imhuri huru, ine gumi nemaviri anozivikanwa parizvino. Anogona kukamurwa kuita mapoka makuru maviri: mafuta-anonyungudika uye mvura-anonyungudika. Mvura-mavhitamini anonyungudika anonyungudika zviri nyore mumvura asi kwete mu-zvinonyungudutsa zvinonyungudutsa. Mushure mekutora, zvishoma zvinochengetwa mumuviri, nekuwanda kuri kubuda muweti. Mafuta-mavhitamini anonyungudika anonyungudika zviri nyore mune-zvinonyungudutsa zvinonyungudutsa asi kwete mumvura. Vanogona kubatwa nemuviri pamwe chete nemafuta uye kuunganidza mumuviri, neine yakaderera excretion rate. Vhitamini yega yega inowanzoita maitiro akawanda, saka mavhitamini mazhinji ane akawanda mabasa. Mavhitamini A, D, E, uye K ane mafuta-anonyungudika, asi mavhitamini B neC ari mavhitamini-anonyungudika mumvura. Zvimwe zvinhu zvine makemikari akafanana nemamwe mavhitamini uye zvinogona kushandurwa kuita mavhitaminzi kuburikidza nemaitiro akareruka emetabolism. Zvinhu izvi zvinonzi provitamins. Semuenzaniso, -carotene inogona kushandurwa kuita vhitamini A; 7-dehydrocholesterol inogona kushandurwa kuita vhitamini D3, asi izvi zvinoda akawanda akaomarara metabolic maitiro. Tryptophan, chikamu che nicotinic acid, haigoni kuonekwa seprovitamin.