Is mold bread and stale similar?

Moldy bread and stale bread are not the same thing. Here's the difference:

* Moldy bread: This is bread that has been infected with mold, a type of fungus. Mold is a visible, fuzzy growth that can be various colors (green, black, white, etc.). Mold produces toxins that can be harmful to humans, making moldy bread unsafe to eat.

* Stale bread: This is bread that has dried out and become hard. It is simply older bread that has lost its moisture. Stale bread is not harmful to eat, although it may not taste as good.

In summary:

* Moldy bread is dangerous due to the presence of toxins.

* Stale bread is simply dry and less appealing, but not harmful.

It's important to always discard moldy bread and never try to salvage it. Stale bread, however, can be used in various ways, such as making breadcrumbs or croutons.