Should you eat 3 quarts of yogurt every day Or is this too much?

Joke? Or do you just really like yogurt?

Let's say you're eating plain lowfat yogurt - that's still 150 calories per cup or 600 calories per quart. That's 1800 calories a day. Let's say you're on a 2000 calorie diet. Those 200 calories you have left are simply not enough to get all the other nutrients that you need in a given day. You're crowding out lots of good stuff. And this is the plain lowfat stuff - the others would be worse for you in a number of other ways.

Find things you love - don't banish yourself to having a sad food life.