User blog comment:Alexander Dragneel/NATSU EATS E.N.D/@comment-24934658-20140728223349/@comment-24934658-20140729191943

We do have to remember that Natsu's age is never disclosed in the anime or manga, so for all we know he could 17 or 700 years old. Same goes for the other Slayers bar Laxus and Cobra.