What happens if you eat moldy bread? Eating moldy bread can lead to a variety of health issues. The mold that grows on bread can produce mycotoxins, which are harmful substances that can cause respiratory and digestive problems. Symptoms of mycotoxin poisoning include nausea, vomiting, diarrhea, and in severe cases, liver and kidney damage.

Additionally, mold spores can trigger allergic reactions and exacerbate asthma symptoms. It is best to avoid consuming moldy bread and to discard any bread that shows signs of mold growth.