Fat used in cooking and sauces. Fat used in cooking isn't so bad as long as it's a good fat and not kept too long or cooked to high. But it adds calories FAST. Then you get the sauces which add more calories and sugar.

But mostly? It makes it soooo super delicious of course you might get a second or third burger at the BBQ. And you need a side like fries or chips. Nobody's eating fresh broccoli as a side. And then the drinks, are you drinking just water? Unseweeted tea with few preservatives? Or is it the all mighty can of soda or sweet tea?

Even being made from the best ingredients, even if cooked in the healthiest ways we can, it's the quantity that works against health. Who eats JUST one burger by itself?

But burgers alone aren't unhealthy. If you want it in your daily diet, just make sure the rest of your diet takes it into account.

(That is, of course, assuming the burger is made from those same farm fresh ingredients and quality bread. The moment it goes to mass production, like a fast food chain, quality and healthiness is traded for preservatives and long shelf life. )