Daniel met the requirements of Nebuchadnezzar. He was young without any physical defects, handsome, had an aptitude for every kind of learning, well informed and quick to understand. Although it definitely wasn’t a requirement he was faithful to Yahweh. Problems arose; he was expected to defile himself with the royal food and wine. Along with his three friends Shadrach, Meshach and Abednego they went on a vegetarian diet for ten days.
At the end of that time they were healthier and better nourished than the other young men. I confess I am a meat eater but this story does indicate that we should keep our God-given bodies in the best possible shape for service to God.