You spot mould on one slice of bread, so can you just cut it off? The USDA says no, and the reason is hiding inside the loaf where you cannot see it

Visible mould on soft foods like bread indicates deep root threads. These invisible threads spread toxins called mycotoxins throughout the food. Consuming these toxins can cause severe allergic reactions and respiratory distress. Firm foods can be salvaged by cutting away affected areas. However, porous and moist foods must be discarded immediately to ensure safety.

You spot mould on one slice of bread, so can you just cut it off? The USDA says no, and the reason is hiding inside the loaf where you cannot see it
Visible mould on soft foods like bread indicates deep root threads. These invisible threads spread toxins called mycotoxins throughout the food. Consuming these toxins can cause severe allergic reactions and respiratory distress. Firm foods can be salvaged by cutting away affected areas. However, porous and moist foods must be discarded immediately to ensure safety.