About the health problems of preserved eggs! I heard that its lead content may be too high. What happened?

Is lead-free preserved eggs really "lead-free"?

It's hot in summer, and a bowl of porridge and a preserved egg is disgusting. But preserved eggs have always been classified as unhealthy food.

In the past, some heavy metals, such as lead oxide or copper, were added to eggs to promote the coagulation of proteins. If eaten for a long time, lead or copper in it will cause chronic accumulation and affect health. Now, after improving the process, copper sulfate and zinc are used instead of lead oxide, hence the name "lead-free preserved egg". Many people think that preserved eggs are lead-free and should be bought for children.

In fact, "lead-free preserved eggs" do not contain lead at all, but the lead content is much lower than before. Although it has little effect on the health of adults, it is best for children to eat less or not, because children are very sensitive to lead, and the absorption rate in the intestine is as high as 50%.

Some people have detected Enterobacter citronellae and mold in preserved eggs, so vinegar, ginger and garlic should be added to eat preserved eggs. First, it can remove the alkaline smell, and second, it can sterilize. In addition, preserved eggs should not be stored for too long and the water evaporates too much. Preserved eggs will be as hard as rubber and not easy to digest.