Collagen ndicho chivakwa chakakosha chemuviri uye chinoumba chikamu chinosvika makumi matatu kubva muzana emapuroteni ari mumiviri yedu. Collagen ndiyo yakakosha mapuroteni anovimbisa kubatana, elasticity uye kuvandudzwa kwese matishu edu akabatana, kusanganisira ganda, tendon, ligaments, cartilage uye mapfupa. Muchidimbu, collagen yakasimba uye inochinjika uye ndiyo 'glue' inobata zvese pamwechete. Inosimbisa zvimiro zvakasiyana-siyana zvemuviri pamwe chete nekuvimbika kweganda redu. Kune marudzi akawanda akasiyana ecollagen mumuviri wedu, asi 80 kusvika 90 muzana yawo ndeye Type I, II kana III, uye mazhinji ari Type I collagen. Type I collagen fibrils ine simba rakakura kwazvo. Izvi zvinoreva kuti vanogona kutambanudzwa pasina kuputswa.