1, texture and taste are damaged: during freezing and thawing, water and nutrients are lost, and the texture of salmon becomes worse.

2, bacterial growth: freezing delayed the growth of bacteria, can not completely kill bacteria. If you eat frozen salmon raw, bacteria still exist, causing food poisoning or physical discomfort.

3. Loss of nutrients: During the freezing and thawing process, water and nutrients in salmon will be lost to the surrounding environment, and the texture and taste of fish will become worse, resulting in the degradation of some nutrients.