There are a couple of things to consider when choosing which type of ground beef to buy.
First is the fat content in the meat. If you want to eat less unhealthy fat, then you should choose ground round or ground sirloin.
Then, look at the food-grade too. Prime grade comes from well-fed young cows. Choice grade is middle of the road and is still high-quality. Select grade is the leanest option. It's also less juicy, but it's the healthiest choice as well.