I had no clue about this!

Fresh meat and poultry are highly perishable and prone to bacterial contamination such as Salmonella and Campylobacter. Once past their expiration date, these items can quickly become unsafe to eat. Symptoms of consuming spoiled meat include nausea, vomiting, and severe gastrointestinal distress.
3. Eggs
Eggs can carry Salmonella bacteria, which proliferate once the eggs are no longer fresh. An easy way to test the freshness of eggs is to place them in water; if they float, they are no longer safe to eat. Consuming expired eggs can lead to foodborne illnesses that cause various digestive issues.
4. Pre-packaged Deli Meats
Pre-packaged deli meats often contain preservatives, but they are still prone to bacterial contamination once opened and beyond their expiration date. The dangers include Listeria, which can be especially harmful to pregnant women, infants, and the elderly.
5. Fish and Seafood
Fish and seafood deteriorate rapidly after their expiration date due to their high protein content, which promotes bacterial growth. Spoiled fish can cause severe food poisoning symptoms such as vomiting, diarrhea, and abdominal pain. Consuming expired seafood is particularly risky because it can also produce harmful toxins.
6. Soft Cheeses
Soft cheeses, like brie and ricotta, have higher moisture content than hard cheeses, making them more susceptible to mold and bacterial contamination. After their expiration date, they can become a source of foodborne illnesses, presenting risks particularly to vulnerable populations.
7. Fresh Berries
Berries are delicate fruits with a short shelf life, and they quickly become moldy once past their prime. Consuming moldy berries can cause respiratory issues and allergic reactions. Always check for any signs of mold and discard the entire container if you find any.
8. Leafy Greens