2. Ukunakekelwa kwesikhumba, i-collagen ilungele isikhumba ukukwazi ukunakekela isikhumba ngempumelelo, ubuhle, ngoba i-collagen inomsebenzi wokondla isikhumba, ingagcina isikhumba sinwebeka ngempumelelo, igcine ukufuma kwaso kanye nokuqina okulula, ilungise isikhumba esonakele, iqinise isikhumba ngempumelelo, imibimbi, igcine ukufuma;