How long does Rod's Food last?

[smspring]

I found some in my freezer, probably 4 years old. Been frozen the whole time. Think it's safe to feed my fish?

 

[ryeguyy84]

4 years? Is it freezer burned?

 

[smspring]

It doesn't look burned

 

[reef_aholic]

Cant see why I wouldnt use it.