Ii-amino acids ezibalulekileyo: Ezi zii-amino acids ezithi umzimba womntu (okanye ezinye ii-vertebrates) zingakwazi ukuzidibanisa ngokuzimeleyo okanye ezizinga le-synthesis zikude ekufezekiseni iimfuno zomzimba kwaye kufuneka zibonelelwe ngokutya kwangaphandle. Imfuneko yee-amino acids ezibalulekileyo kubantu abadala malunga ne-20% ukuya kwi-37% yemfuno yeprotheyini. Kukho iintlobo ezisi-8, kwaye imisebenzi yazo imi ngolu hlobo lulandelayo:
I-Lysine: Ikhuthaza ukuphuhliswa kwengqondo, iyingxenye yesibindi kunye ne-gallbladder, ikhuthaza i-fat metabolism, ilawula i-pineal gland, i-mammary gland, i-corpus luteum kunye ne-ovary, kwaye ikhusela ukuchithwa kweeseli;
I-Tryptophan: Ikhuthaza ukuveliswa kwejusi yesisu kunye nejusi ye-pancreatic;
I-Phenylalanine: Ithatha inxaxheba ekupheliseni ukulahleka kwezintso kunye nomsebenzi wesinye;
I-Methionine: Ithatha inxaxheba ekubunjweni kwe-hemoglobin, izicubu kunye ne-serum, kwaye inomsebenzi wokukhuthaza i-spleen, i-pancreas kunye ne-lymph;
I-Threonine: Inomsebenzi wokuguqula i-amino acids ethile ukuphumeza ukulingana;
Isoleucine: Ithatha inxaxheba kulawulo kunye ne-metabolism ye-thymus, i-spleen kunye ne-pituitary gland;
Leucine: Ibhalansi isoleucine;
I-Valine: Isebenza kwi-corpus luteum, i-mammary gland kunye ne-ovary. ISemi-eziyimfuneko kwaye ziyimfuneko ngokwemeko yee-amino acids: Ii-amino acids ezinomzimba womntu kodwa azikwazi ukuhlangabezana neemfuno eziqhelekileyo zibizwa ngokuba zii-amino acids-eziyimfuneko okanye ngokwemiqathango eyimfuneko. Ezi ikakhulu zi-arginine kunye ne-histidine, eziyimfuneko ye-amino acids ngexesha lokukhula komntwana. Isidingo somzimba womntu se-amino acids esibalulekileyo siyancipha ngokuya ngeminyaka, kunye nokuncipha okukhulu kwabantu abadala xa kuthelekiswa neentsana. Imisebenzi yabo yile ilandelayo:
I-Arginine: I-Arginine kunye ne-deoxycholic acid amalungiselelo ekhompawundi (i-minoxaline) ziziyobisi ezisebenzayo zokunyanga i-syphilis, i-jaundice yentsholongwane, njl.
I-Histidine: Ingasetyenziselwa njenge-reagent ye-biochemical kunye ne-agent ye-pharmaceutical, kwaye iphinda isetyenziswe kunyango lwesifo senhliziyo, i-anemia, i-rheumatoid arthritis, njl.
-i-amino acids ezingabalulekanga: Ezi zii-amino acids abantu (okanye ezinye ii-vertebrates) ezinokudityaniswa kwi-precursors ezilula kwaye akukho mfuneko yokuba zifumaneke ekutyeni. Imizekelo ibandakanya i-glycine kunye ne-alanine.