Jam is a gelatinous substance made by mixing fruit, sugar and an acidity regulator and simmering it at a temperature of more than 100°C. It is also called jam. It is mainly used to spread on bread or toast for consumption. Jam can also be made from small fruits such as strawberries, blueberries, grapes, roses, etc., or large fruits such as plums, oranges, apples, peaches, etc., when chopped small, although only one type of fruit is usually used at the same time in the preparation. Colloids are used for sugar-free jams, inexpensive jams, or special jams (e.g., durian, pineapple). The colloids commonly used in jams are: pectin, soybean gum and sanshin gum.