2'-fucosyllactose(2'-FL) is a type of sugar that is a derivative of lactose. It contains fucose, a sugar that is abundant in seaweed, and lactose, the sugar in milk. 2'-fucosyllactose is a rare disaccharide sugar that is present in human milk but not in cow's milk. It is structurally similar to Lacto-N-fucopentaose III.

Now, more and more people choose 2'-fucosyllactose as a dietary supplement, mainly because:

1. Nutritional value: Lactose, the main carbohydrate in mammalian milk, has important nutritional value for the growth and development of infants and the health of adults. 2'-Fucosyllactose, a derivative of lactose, preserves the basic nutritional value of lactose while potentially having better bioavailability.

2. Safety: After evaluation by the European Food Safety Authority (EFSA), it is concluded that 2'-fucosyllactose is safe under the recommended conditions of use. This means that it does not have negative effects on human health and can be used as a novel food additive.

3. Functionality: 2'-Fucosyllactose may have some functional effects, such as improving gut microbiota balance and enhancing immunity. These functional studies provide a theoretical basis for its use as a novel food additive.

It should be noted that although the theoretical basis for 2'-fucosyllactose as a novel food additive is relatively well established, further research and evaluation are still needed to determine its specific eating effects and safety. When using it, it should be followed by food safety regulations and guidelines to ensure that its use complies with regulations and does not pose potential risks to human health.