Having just peeled about 10kg of them I noticed a lot of black bits in there which I believe is frost damage ?

I'm wondering if its bad for you in anyway ? Suppose they had been peeled using a big chip-shop peeler and no one noticed, fried and given out etc.. is it in anyway changed from normal potato ?

Steve

Been googling.. The general comments seem to suggest its bruising caused by rough handling when being picked in cold temperatures. Can't see anything about if its changed its chemical properties in anyway though !

Steve

Why do some potatoes go black when they've been boiled. yet others do not?

where they already black to start with inside (bruising) and you just hadn't noticed ?

Steve

I'm not sure, but I do know what you mean because I have seen that before.

Sid

Frost damage potatoes tends to be slightly pale coloured and goes sort of translucent on boiling. Not good for consumption. Have encountered black bits with slug attacks, but then they make tunnels inside potatoes which are visible from outside.

This isn't tunnelled its just black/dark purple just at the surface and going in (skin intact).. like a bruise on your skin might be...

Steve