Buy trendy sponges from Konjac at Snapdeal. Ninety seven percent of Konjac is water and three percent is Glucomannan, or dietary fiber. It is also rich in minerals .But, for over a century, the Japanese have been using the konjac vegetable as a beauty treatment also for their delicate skin. Amorphophallus konjac is an alkaline and is loaded with goodness. It contains so many natural goodies like Protein, carbohydrate, iron, phosphorus, copper, zinc, vitamin A, vitamin E, vitamin D, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin C and folic acid.