Collagen ndi puloteni yomwe imapangitsa kuti minofu ya thupi ikhale, kulimba, kusasunthika, ndi kapangidwe kake. Amapezeka m'mafupa, cartilage, tendons, ndi khungu.
Zakudya zokhala ndi mapuloteni ambiri zimalimbikitsa kupanga kolajeni, kuphatikizapo nyama, nsomba, mazira, ndi mkaka. Collagen imafunikiranso michere monga vitamini C (yomwe imapezeka mu zipatso, masamba obiriwira, ndi tomato) ndi zinki.