User blog comment:IamJakuhoRaikoben/Chapter 245: The Unbranded Man, Review./@comment-3987368-20110730184547/@comment-41.235.50.184-20110730193324

actually it was previously stated that it's dangerous of Natsu to eat other elements Natsu was out cold for a week back at tower of heaven arc because he ate the etherion  and happy mention in fighting festival arc if i recall that Natsu ate a lightning from laxus and suffer the same effects but right not mashima have botched a lot in that manga so he well make Natsu fine in the next day.