by Jeanne Yacoubou, MS VRG Research Director The VRG recently surveyed food ingredient manufacturers and suppliers as well as bread and bagel companies to find out if the animal sources of the common amino acid dough conditioner and human and pet food reaction flavor used to make flavor enhancers, L-cysteine, were still dominant in the … Continue reading L-Cysteine in Bread Products Still Mostly Sourced from Human Hair, Duck Feathers, Hog Hair