Another important by-product from tilapia farming is collagen collected from the inside of the fish skins; European countries moved away from the collagen from mammals due to fears of mad cow disease, according to a 2008 report by the University of Arizona.
Zwinwe zwithu zwine zwa vha zwa ndeme zwine zwa itwa nga tilapia ndi collagen ine ya vha i tshi khou bva nga ngomu ha lukanda lwa khovhe, mashango a europeans vho bva kha u ita collagen nga zwifuwo zwa hayani vha tshi khou shavha u tangana na dzine dza vha uri dzi khou penga dzi kholomo, uya nga ha muvhigo wo itwaho nga 2008 nga gudedzi la Arizona.