Crystalline fructose can be consumed in moderation during weight loss, but excessive consumption is not recommended. Crystallized fructose occurs naturally in honey and in plants of the Asteraceae family such as chrysanthemum and chicory. Fructose sweetness, fruit flavor, low calories, metabolism in the body faster than glucose, easy to be absorbed and used by the body, and does not depend on insulin, less impact on blood sugar, the sweet taste of dieters and diabetic patients is the ideal sweetener, can be consumed in moderation. Although the crystallized fructose low calorie, but still has a certain amount of heat, if excessive consumption and do not pay attention to exercise consumption, may make the body intake of excessive energy, converted to fat accumulation in the body, resulting in obesity. Therefore, during the weight loss period, crystallized fructose can be consumed in moderation, not a large number of long-term consumption.