User blog comment:IamJakuhoRaikoben/Chapter 294: Battle of the Dragon Slayers, Review./@comment-3271746-20120804025511/@comment-4829046-20120804031320

Nah! I think it was just to show that Sting can vaporize anything he eats into light energy. And also that due to his ability he doesn't get poisoning from eating the wrong elements.