糖类也是碳水化合物，糖类的来源是精制糖——蔗糖，它是一种食品甜味剂、防腐剂和果糖。
Sugars are also carbohydrates, sources of sugars are refined sugar—sucrose, which is a food sweetener and preservative and fruit sugars—fructose.
木糖醇是一种天然的甜味剂，芬兰人最初发现它可以有效预防龋齿。
A naturally occurring sweetener, xylitol had primarily been known in Finland for its effectiveness in preventing tooth decay.
但是大多营养学家说，消费者对甜味剂的忧虑是一种误导行为。
But most nutrition scientists say that consumer anxiety about the sweetener is misdirected.
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