Meaning and usage of the word castor sugar in English

Castor plants produce seeds that contain a toxic protein called ricin, which is used as a biological weapon in certain parts of the world. However, there is a substance found within these seeds called ricinoleic acid, which is used to produce castor oil. In the production of castor sugar, the castor oil is first hydrogenized to produce a substance called hydrogenated castor oil. This hydrogenated castor oil is then treated with a specialized enzyme called glucose isomerase, which converts some of the glucose into fructose, thus producing a sugar that's similar in flavor and sweetness to sucrose (table sugar). The resulting product, which is around 96% pure, is called isoglucose or castor sugar. The use of castor sugar as a sugar substitute is quite beneficial as it is less expensive than sucrose and provides a number of health benefits due to its low glycemic index. Castor sugar also does not cause tooth decay as it does not react with oral bacteria in the same way as sucrose does. So, while it may not have anything to do with the furry rodents we often see near water bodies, the origin of the word "castor sugar" is quite interesting and informative to know.