It is best not to eat tea eggs overnight, not only tea eggs, but also many other foods, especially cooking. As long as it's overnight, don't eat any more. In the long run, this is harmful to our health. Everyone should be careful not to cook too much.
No matter how the eggs are treated overnight, if they are not completely cooked, they can't be eaten overnight, because bacteria are easy to breed during storage, and eating them overnight can easily cause symptoms such as gastrointestinal discomfort and flatulence. If it is a well-cooked egg, it can be eaten within 48 hours if it is properly sealed and stored at low temperature.
Boiling eggs with tea will affect your health. The expert's explanation is that tea contains biological acid-base components and acidic substances, which will penetrate into eggs after cooking and combine with iron in eggs; This combination is very irritating to the stomach. Over time, it will affect the digestion and absorption of nutrients, which is not conducive to human health.
References:
Baidu encyclopedia tea eggs