Look for the word "National Drug Approval". Find out where the collagen is produced - Dong'e County. Only large companies have the strength to control the maturity of various processes and the purity of raw materials. When buying donkey-hide gelatin, you should look for big brands and national medicine approvals:

1. Shandong Dong-e donkey-hide gelatin Co., Ltd.

National drug approval number Z37021368

Address: No. 78 donkey-hide gelatin street, Dong'e County, Shandong Province

2. Shandong Dong'e Xiuyuan donkey-hide gelatin Biogroup Pharmaceutical Co., Ltd.

Runhuitang brand donkey-hide gelatin

National drug approval number Z23020807

Address: No. 1, Jiaoguang Road, Industrial Park, Dong'a County, Shandong Province

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3. Shandong Fukiao Group Dong'e Town Donkey-hide Jiao Co., Ltd.

Fu brand donkey-hide gelatin

National drug approval number Z37021269

Address: Ping, Shandong Province Dong'e Town, Yin County

4. Beijing Tongrentang Technology Development Co., Ltd. Pharmaceutical Factory

Tongrentang brand donkey-hide gelatin

National drug approval number Z11020989

Address: South entrance of Futou Village, Zhangjiawan Town, Tongzhou District, Beijing

Identification method:

Donkey hide gelatin is made from donkey skin, rinsed and hair-removed. There are many counterfeit donkey-hide gelatin products, and they are also more complex. Generally speaking, authenticity can be identified from the following aspects.

(1) Packaging: Donkey-hide gelatin, like other medicines, is a special commodity. The factory name, factory address, approval number, product name, registered trademark, functional indications, specifications, etc. must be indicated on the packaging. Currently, it is labeled as " The quality of Dong'e brand, "Runhuitang" brand and "Dong'e Town" brand is the best.

(2) Block shape: The genuine product is in the shape of a rectangular block, with a color like glaze and a translucent amber color, with a smooth surface and vertical coarse cloth-like stripes; the fake product has different block shapes and specifications, and the color is as black as jet black. Or blood red.

(3) Texture: The genuine product is hard and brittle, hard when broken by hand, brittle when hit, and the cross-section is bright and brown and translucent when viewed in the light; the fake product does not have the above characteristics, and is easy to soften in summer and easy to soften in winter. Easily broken.

(4) Odor: The genuine product has a glue aroma; the fake product has a strange smell.

(5) Residue: After the genuine product is steamed, there is generally no slag; after the fake product is steamed, there is a lot of slag and it is not suitable to be dissolved.

The "miscellaneous skin glue" made from fake donkey-hide gelatin is mainly made of pig skin glue, cowhide glue, mixed skin and mixed bones. Pigskin glue, some people also call it new donkey-hide gelatin, has a rectangular shape, a dark brown surface, and a hard and brittle texture. The fragments are brown rather than translucent to light, and the cross-section is not bright.

Craft gelatin is also called yellow gelatin. Its appearance is similar to donkey-hide gelatin. Its surface is brown and sticky, and it is not easy to break. Its broken surface is shiny, has a fishy smell and a slightly sweet taste.

The appearance of mixed leather glue is similar to that of donkey-hide gelatin. The surface is dark brown with poor luster. It is brown and translucent when viewed through light. It is hard and easy to soften but not easy to break. Sometimes it is deformed or sticky, and the cross section is not bright. The smell is fishy and slightly sweet. Bone glue often has small pore-like pores on the glue surface, which is dull, opaque or slightly transparent. It is tough and not easily broken, and its cross section does not look like glass when exposed to light (the genuine product does).

To distinguish donkey-hide gelatin from cowhide gelatin, mixed skin gelatin, and pigskin gelatin, you can also add an appropriate amount of water to heat and dissolve them, and then observe the color and taste of the aqueous solution. The aqueous solution of genuine donkey-hide gelatin is transparent brown-red or tea-red, clear but not turbid, has a slightly fishy smell and a slightly sweet taste. The aqueous solution of pig skin glue is turbid and brown, and fatty oil can be seen on the surface of the water liquid. Its vapor has the smell of pork skin soup and a slightly sweet taste. The aqueous solution of cowhide glue is gray-brown, sometimes turbid, and sometimes gray precipitate can be seen, with a fishy smell and slightly sweet taste. The aqueous solution of mixed skin glue is transparent and light reddish brown, with oil droplets visible on the surface, and sometimes a small amount of impurity deposits. It has a fishy smell and a sweet taste.