A lot of it has to do with what kind of flexibility there is in the meal plan and what you do with it. Fortunately I think there are more choices than there were when I was there.
Our meal plan was mandatory for a minimum of 16 meals/week . We had no salad bar and our only vegetable choice (every day) was overcooked canned vegetables swimming in oil. (NASTY). Deep fried and casseroles were 85% of the meals. The food was disgusting but there were no grocery stores in walking distance to campus and most students in the dorm couldnt afford to park a car on campus.
The 15 isnt mandatory it comes from:
Poor food availability
- Budget constraints (unfortunately fattening foods are cheap and easily available)
- Lack of food knowledge (you should be good here!) but for many college freshman this is the first time they have been in charge of their own food choices
- Social eating and temptations- If everyone in your study group wants to order pizza...
- Alcohol, it's calories, and the related lack of food control
- Stress eating and sleep disruption- what is available at 2 am in your dorm when you are cramming for your midterm. Unless you plan ahead it's likely to be vending machine.
Budget time for exercise. Budget room for SOME social eating so you can control it. Stock your dorm with reasonable alternatives. If you cant go to the grocery often, figure out reasonable shelf stable alternatives and go when you can.