Preserved eggs will expire, and the national standard for preserved eggs is to keep them for up to 5 months. Generally speaking, there are strict national standards for preserved eggs, both in production technology and technical requirements. Because preserved eggs contain trace amounts of lead, products that do not meet the national standards are very likely to endanger health.

Don't expose the peeled preserved eggs to the air for a long time, and it is best to eat them within 2 hours, otherwise Salmonella will easily breed.

Purchase method

Preserved eggs on the market include duck eggs or egg preserved eggs, which can be selected according to personal preference. When buying preserved eggs, you can pay attention to whether there is a quality certification mark. In addition, preserved eggs with high lead and copper content will have more spots on the surface of the eggshell, and after shelling, you can also see that the color of the protein is dark green or occasionally black spots, which is not suitable for purchase.

Some preserved eggs made by traditional methods will be covered with red soil and straw, which is not hygienic and it is not convenient to judge the lead content by appearance, so it is not suitable for purchase. It is suggested that products with complete packaging and clear labels should be purchased. Pay attention to the date of manufacture when buying, and pay attention to the way and duration of preservation when going home to save.

Reference to the above content: People's Daily Online-Does preserved eggs contain lead? There is no need to worry about choosing products from regular manufacturers.