Konjac flour, also known as konjac flour or konjac mannan, is an extract of konjac.Konjac is a beneficial alkaline food. For people who eat too much acidic food from animals, eating foods made from konjac can achieve the acid-base balance of the food, which is beneficial to human health.Konjac is a tuber flat-shaped, like a big water chestnut. It is very nutritious. It contains a variety of vitamins and minerals such as potassium, phosphorus, and selenium. It also contains konjac polysaccharides that humans need, and has low calorie, low fat and high fiber.element characteristics.