Root Fiber Bioengineering Co., Ltd.

Root Fiber Bioengineering, registered as Henan Tianxian Yikang Technology, makes dietary fibre and nothing else. The single ingredients are polydextrose, a soluble fibre, and insoluble fibres milled from wheat, oat, maize and Chinese yam. Two compound fibre preparations, sold as Xianyichang and Maixianbao, sit alongside them for makers who want a blend rather than a raw fibre.

The company handles research, manufacturing and sales itself, and states its aim as making dietary fibre an everyday ingredient in everyday food. Chinese yam fibre is its unusual line, worked from a Henan speciality crop rather than from a cereal milling by-product. The business is based in Henan.