Different sources and different uses.

1. Trehalose is a natural sugar extracted from the cell wall of seaweed. It is a natural food ingredient. Xylitol is a synthetic sugar obtained by chemically converting xylose and is an artificial food ingredient.

2. Trehalose can be used as a sweetener and moisturizer in foods and cosmetics, and has high nutritional value. Xylitol is often used to replace sucrose in food, beverages and medicines and has anti-caries effects.