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Abstract

An immunosuppressive agent and food, which can prevent type I allergic diseases, autoimmune diseases, rejections in organ transplant and improve morbid states even when these diseases are induced, and which are safe and easy to intake. The immunosuppressive agent and food contain a fine powder of a hydrophilic polysaccharide. Preferably, the fine powder of hydrophilic polysaccharide is in the form of glucomannan which is refined konjak flour, has a dietary fiber content of 90% or more, and is easily soluble in water. For making the glucomannan into an easily water-soluble state, it is preferably subjected to a pulverization treatment. Preferably, the glucomannan subjected to the pulverization treatment has a weight average molecular weight of 1,000,000 or more and an average particle diameter of 100 .mu.m or less, and a period of time until 1% aqueous solution thereof reaches the viscosity peak at room temperature is within 30 minutes. As a fort, powder, capsule, tablet, pill or granule may be mentioned.

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