2. Look at the permeability: the real fish glue is permeable, and the synthetic fish glue is poor in permeability and muddy.

3. Look at the color: artificial fish glue is white, old glue is yellow, old glue has been stored for a long time, and its internal structure has changed, which makes it easier for human body to absorb and has high nutritional value.

4. Look at stewing: Fish glue is a natural protein and unsaturated fat, which is easy to stew when stewing, and the soup is clear.

5. Look at the shape: Fish glue is a pure natural wild food, and its shape and size will be different.

6. On the whole, there is little difference in the size and shape of each gelatin, which is basically synthetic.

7. Fish glue is the dry product of swim bladder (the organ used by fish to adjust sinking and floating, also called fish bubble, which contains gas). It is rich in glue, so it is named fish glue, also called fish belly and flower glue.

8. Fish glue is as famous as bird's nest and shark's fin. It is one of the "eight treasures" and is known as "marine ginseng".

9. The main components of fish glue are high-grade collagen, multivitamins and trace elements such as calcium, zinc, iron and selenium.

10. Its protein content is as high as 82% and its fat is only 0.2%, so it is an ideal high-protein and low-fat food.

1 1. is a raw material for human body to supplement and synthesize protein, and it is easy to be absorbed and utilized.

12. A functional fish protein. In appearance, the new fish glue is whiter and more transparent, while the old fish glue tends to be dark yellow, with wrinkled skin and full of cracks.

13. In terms of taste, the new fish glue tastes sticky, while the old fish glue is completely non-sticky, and it becomes very thick when boiled, even more than one centimeter, just like eating muffins, which is white powder.