It is no longer edible. If it smells bad, it may cause cancer.

Shop skin can be stored for a long time. The main antibacterial factors are low moisture and high salt content. Both are indispensable. If it is not dried out or is damp, bacteria will not let go of food with such a high protein content. The dried shrimp skin is not completely dried. On the one hand, it may be because the air at the seaside is humid. On the other hand, it may be because the dried shrimp skin is heavier and the merchants have greater profits.

Moist dried shrimps tend to go bad because the protein is broken down in a humid environment. Because the shrimp skin is not completely dried, bacteria will multiply during storage at room temperature, decompose protein, and produce low-grade amines and ammonia. By this point, protein breakdown has become very severe.

The production of low-level amines is not only toxic in itself, but what is even worse is that they are very easy to combine with small amounts of nitrite in aquatic products to form strong carcinogens-nitrosamines and nitrosamides. These substances are important chemical factors that cause esophageal cancer and gastric cancer.

Extended information:

How to store dried shrimp:

Because many dried aquatic products are dehydrated and exposed to the sun, they are not afraid of light. The best way to store them is to put them in a wide-mouthed glass bottle and place them in a light place, occasionally opening the bottle to let out moisture. In this way, firstly, it can prevent odor transfer; secondly, it can prevent moisture and hair growth.

1. Light dried shrimps can be spread out in the sun to dry. After drying, put them into bottles and store them.

2. Salty shrimps should not be dried in the sun. They can only be placed in a cool place to air-dry before being put into bottles.

3. Whether you are storing light or salty shrimp, you can put an appropriate amount of garlic in the bottle to avoid insects.

People's Daily Online - Dried shrimp before storing to avoid protein decomposition and the formation of carcinogens

Baidu Encyclopedia - Dried shrimp