They are all refined from sucrose. Because the purity of rock sugar is the highest in the production process, it will not have a sour taste like other sugars, so everyone thinks that rock sugar is better. But because of the highest purity of rock sugar, the nutrients called impurities are relatively much less.

The difference between rock sugar and white sugar is that one is crystal and the other is fine granular wet powder. The sugar content of the two is the same, there is nothing good or bad, just a matter of taste. Generally, healthy people eat sugar properly, which is beneficial to their health. People with diabetes should try to eat less or not.

White sugar refers to the finished product sucrose crystals made from sugarcane, beet or raw sugar (coarse sugar) through the processes of extracting sugar juice or redissolving, cleaning sugar juice or syrup, boiling and crystallizing, centrifugal honey separation, screening and drying, etc. The sucrose content is not less than 99.5%, which meets the edible hygiene conditions and can be used as raw materials and auxiliary materials for direct consumption or food processing industry.

There are two production methods of rock sugar. The first production method is the hanging-thread crystallization growing method, that is, hot refined saturated sugar solution is slowly poured into a barrel hung with fine cotton thread, and slowly cooled and crystallized in a crystallization chamber for more than 7 days, and sucrose crystals are formed around the cotton thread and grown into large grains and chunks of rock sugar. The second production method is the seed-feeding method, that is, hot refined saturated sugar solution is put into a shaker-type crystallization tank, and a certain amount of seeds are put into the shaker-type crystallization tank to slowly cool down while swinging (heat preservation and temperature control by water jacket interlayer), so that the crystal grains grow up and form single crystal rock sugar.

Because the contact area with the mouth is large when eating white sugar, and it melts quickly, it feels sweeter than eating rock sugar.