Comment by wongarsu
My method is that I assume it's gone bad when it tastes sour.
My method is that I assume it's gone bad when it tastes sour.
I can taste the mold in bread before it's grown big enough to become visible.
For most foods evolution has graced us with the ability to see, smell or taste any issues well before they actually become a problem. There are some things you have to look out for like botulism or salmonella, but for simple foods like bread and milk there isn't much point in taking precautions
I throw away bread when the green fuzzy stuff on it no longer tastes good.