Uninzi lweeproteni ezisebenzayo emzimbeni ziphuma kwi-collagen, ekwabaluleke kakhulu eluswini, kwizihlunu nakwithambo. I-Glycine, iproline, i-hydroxyproline, kunye nezinye ii-amino acids zininzi emzimbeni womntu. Kuyimfuneko ekukhuleni kwezicubu ezixhumeneyo ezifana nolusu, imithambo yegazi, amathambo, iitendon, amazinyo, kunye ne-cartilage ebantwini nakwizilwanyana.