Look at the appearance of donkey-hide gelatin. Genuine donkey-hide gelatin is a brown rectangular or square flat block with a flat shape, smooth surface, neat corners, and luster. The edges are translucent when viewed through light, and are brittle and fragile. Fake donkey-hide gelatin is usually dark in color and has an uneven surface. Smooth, some have holes and should not be broken or even bent.

The "smell" can be heard. You should smell the glue block directly, preferably broken into powder. Authentic donkey-hide gelatin has a glue smell, while fake donkey-hide gelatin has a fishy smell.

You can verify donkey-hide gelatin, compound donkey-hide gelatin slurry, donkey-hide gelatin blood-enhancing cream, and donkey-hide gelatin blood-enhancing granules on the official website of donkey-hide gelatin according to the serial number or 16-digit ID number on the product.