Microwaving, toasting, or frying moldy bread may kill the visible mold, but it does not make the bread safe to eat. Mold can produce harmful mycotoxins, even if the mold itself is no longer visible. These mycotoxins can remain in the bread and pose a health risk if ingested.
Mycotoxins are toxic substances produced by certain types of mold and can lead to various health issues, including allergic reactions, respiratory problems, and gastrointestinal disturbances. Even heating the bread through cooking processes might not destroy all the mycotoxins present.
Therefore, it is not advisable to consume moldy bread, even after attempting to "kill" the mold through cooking. The best practice is to discard moldy food, including bread, to avoid potential health problems. To prevent mold growth, store bread in a cool, dry place and consume it before its expiration date. If you notice any mold growth on bread or any other food item, it's best to play it safe and dispose of it.