A normal warforged can consume food and potions, he just doesn't need to. He can still take advantage of special consumables though.Saeviomagy said:OTOH, never being able to benefit from a heroes feast could be a pretty bad downside.
However, if he takes a few levels of the PrC Warforged Juggernaut, he loses that ability (at least the ability to get the advantage of heroes feast - not sure about potions off-hand).