White sugar and rock sugar are both extracted from sugar cane and sugar beet, belonging to the category of sucrose. White sugar is made of brown sugar through washing, centrifugation, honey separation and peeling. Rock sugar is formed by recrystallization of white sugar under certain conditions. Their chemical composition is sucrose.

White sugar is flat and high in purity; Rock candy is the crystallization of sugar.

Efficacy: Proper consumption of white sugar helps to improve the body's absorption of calcium; But too much will hinder the absorption of calcium. Rock candy can nourish yin and promote fluid production, moisten lung and relieve cough, and has a good auxiliary therapeutic effect on lung dry cough, dry cough without phlegm and expectoration with blood.

If you cook pears, you'd better use rock sugar. Rock sugar tastes pure and its efficacy is 1+ 1 greater than 2.