Konjac is a Japanese root vegetable full of fiber, it has been used by people in East Asia for thousands of years and is mainly grown in Asian countries, it resembles the oddly shaped potato (because it comes from the same family as the potato), it contains a soluble fiber called glucomannan. Konjac, in fact, has the highest molecular weight and consistency of any known dietary fiber.

Konjac is a perennial plant of the genus Amorphophallus that grows in tropical and subtropical regions of East Asia, from Indonesia to India, Japan and China. Primarily with corm starchy, a tuber-like structure that is actually part of the stem of plants, but grows underground and serves as a storage organ for the plant.

Konjac is primarily used as a source of glucomannan, a dietary fiber that makes up about 40% of the plant Glucomannan is used as a food additive for its thickening and emulsifying properties and as a food supplement to treat obesity, constipation, high cholesterol, diabetes and acne, providing a rich source of soluble fiber, which is of general benefit to the digestive system, while containing virtually no calories.