CJ CheilJedang has announced the launch of L-cysteine using raw sugar and glucose as raw materials, “while the majority of manufacturers in the market are using” a process that starts with duck feather as a raw material. The company noted that there was an unstable supply of L-cysteine due to reinforcement of the governmental regulations in China. L-cysteine and its derivatives are used for reaction flavors, bakery, and pet food items. See:
http://www.foodingredientsfirst.com/news/CJ-CheilJedang-Launches-Fermented-L-Cysteine-Through-Sustainable-Technology?type=article