Ian supposed there was something on the TARDIS. But given the problem the Doctors had had with it, it probably wasn't to be trusted. Or a good idea to bring up with people he didn't know if the Doctor trusted with the information.

"There's no guarantee that everywhere we stopped would be friendly," he pointed out. "We could go a long time just eating this food anyway. And I'm not sure I like the idea of magically created food. You can't create something from nothing." Even if magic was real it was against the laws of physics.