Eggs are nutritious and can supplement the body with various nutrients, but there are several types of eggs that should not be eaten. Do you know what they are?
Smelly eggs: Due to the invasion of bacteria inside the egg, which multiply in large numbers and cause spoilage, the eggshell turns a dark grayish color. The internal gas, hydrogen sulfide, may even cause the eggshell to expand and rupture. The egg's contents will appear grayish-green or dark yellow and have a foul odor. Such eggs are inedible and can cause bacterial food poisoning if consumed.
Cracked eggs: During transportation, storage, and packaging, eggs can develop cracks or fissures due to vibration, squeezing, or other reasons. This makes it easy for bacteria to invade. If they have been stored for a long time, they should not be eaten.
Stuck-to-shell eggs: These eggs have been stored for too long, causing the yolk membrane to weaken from tough to fragile. The yolk sticks closely to the shell. If only a small part is red, it can still be eaten. However, if the yolk membrane is firmly stuck to the shell and the attached area is dark black with an off odor, it should not be consumed.
Broken-yolk eggs: The yolk membrane can rupture due to violent shaking during transportation, causing mechanical yolk breakage. Alternatively, if stored for too long, bacteria or mold can enter the egg through the shell's pores, destroying the protein structure and causing the yolk to break. The egg white will be thin and cloudy. If the yolk breakage is not severe, there is no odor, and it can still be eaten after being cooked at high temperatures. However, if bacteria have multiplied inside the egg, the proteins have denatured, and it has a foul odor, it should not be eaten.
Dead-in-shell eggs: These are eggs where the embryo's development has stopped during incubation, caused by contamination from bacteria or parasites, combined with poor temperature and humidity conditions. The nutritional content of such eggs has changed. If the embryo has been dead for a long time, the proteins will decompose, producing various toxic substances, so they should not be eaten.
Moldy eggs: Some eggs are exposed to rain or moisture, which washes away the protective film on the shell's surface, allowing bacteria to enter and cause mold and spoilage. This results in black spots and mold on the shell. Such eggs should not be purchased or consumed.
In addition, eggs such as "yellow diarrhea eggs" and "blood streak eggs" generally should also not be purchased or eaten.