2, chestnuts contain starch, monosaccharides and disaccharides, carotene, thiamin, riboflavin, niacin, ascorbic acid, protein, fat, inorganic salts and other substances, whether eaten raw or cooked to eat have a certain nutritional value. But after the chestnut outside the mold, there may also be bacteria or fungal growth, consumption may not taste good, the nutritional value of the inside may have been destroyed, may lead to gastrointestinal discomfort, aflatoxin poisoning and other problems, so it is not recommended to eat.