Shirataki noodles are made from glucomannan. Other food sources that contain glucomannan include konjac jelly and tofu. Glucomannan supplements come in gummies, pill, powder, and tablet forms.

It is most commonly boiled down and made into a jelly-like, flavorless block, which is seasoned and eaten solo or added to desserts and soups. The powder or flour made from konjac can also be used ...