Ama-amino acid abalulekile: Lawa ama-amino acid umzimba womuntu (noma ezinye izilwane ezinomgogodla) ongakwazi ukuzihlanganisa ngokuzenzakalelayo noma izinga lawo lokuhlanganisa likude kakhulu nokuhlangabezana nezidingo zomzimba futhi kufanele lihlinzekwe ngokudla kwangaphandle. Isidingo sama-amino acid abalulekile kubantu abadala cishe singama-20% kuya ku-37% wesidingo samaprotheni. Kunezinhlobo eziyi-8, futhi imisebenzi yazo imi kanje:
I-Lysine: Ikhuthaza ukuthuthukiswa kobuchopho, iyingxenye yesibindi ne-gallbladder, ikhuthaza umzimba we-fat metabolism, ilawula i-pineal gland, i-mammary gland, i-corpus luteum ne-ovary, futhi ivimbele ukuwohloka kwamangqamuzana;
I-Tryptophan: Ikhuthaza ukukhiqizwa kwejusi yesisu kanye nejusi le-pancreatic;
I-Phenylalanine: Ibamba iqhaza ekuqedeni ukulahleka kokusebenza kwezinso nesinye;
I-Methionine: Ibamba iqhaza ekwakhiweni kwe-hemoglobin, izicubu kanye ne-serum, futhi inomsebenzi wokuthuthukisa i-spleen, pancreas kanye ne-lymph;
I-Threonine: Inomsebenzi wokuguqula ama-amino acid athile ukuze afinyelele ibhalansi;
Isoleucine: Ibamba iqhaza ekulawuleni nasekusebenzeni kwe-metabolism ye-thymus, i-spleen kanye ne-pituitary gland;
I-Leucine: Ibhalansi isoleucine;
I-Valine: Isebenza ku-corpus luteum, i-mammary gland kanye ne-ovary. Ama-amino acid-abalulekile futhi anemibandela abalulekile: Ama-amino acid umzimba womuntu ongawahlanganisa kodwa ngokuvamile awakwazi ukuhlangabezana nezidingo ezijwayelekile abizwa ngokuthi ama-amino acid-abalulekile noma abalulekile ngokwemibandela. Lezi ngokuyinhloko i-arginine ne-histidine, okungama-amino acid abalulekile ngesikhathi sokukhula kwengane. Isidingo somzimba womuntu sama-amino acid abalulekile siyehla ngokuya ngeminyaka, ngokuncipha okukhulu kwabadala uma kuqhathaniswa nezinsana. Imisebenzi yabo imi kanje:
I-Arginine: I-Arginine ne-deoxycholic acid amalungiselelo enhlanganisela (i-minoxaline) imithi ephumelelayo yokwelapha ugcunsula, i-jaundice yegciwane, njll.
I-Histidine: Ingasetshenziswa njenge-reagent ye-biochemical kanye ne-ejenti yemithi, futhi isetshenziselwa ukwelapha isifo senhliziyo, i-anemia, i-rheumatoid arthritis, njll.
-Ama-amino acid angabalulekile: Lawa ama-amino acid abantu (noma amanye ama-vertebrates) angawahlanganisa kusuka kuma-precursor alula futhi okungadingeki awathole ekudleni. Izibonelo zifaka i-glycine ne-alanine.