Money is usually the bigger driver behind freshman weight gain, not willpower. A meal plan covers the dining hall, but once the balance runs low near the end of the semester, students switch to whatever's cheapest and fastest nearby — and cheap-and-fast on a campus strip usually means fried food or a convenience-store shelf.
The convenience-store markup is worse than it looks on paper. A vending-machine bag of chips or a store-bought sandwich can cost two to three times what the same item costs at a regular supermarket, and a semester of that adds up in both money and what it's actually buying. One trip to a proper grocery store for oats, rice, frozen vegetables and dried dates covers weeks of snacking for less than a single week of vending-machine runs — see this wholesale dates price guide for what buying in bulk actually saves.
A dorm room usually has at least a microwave, sometimes a hot plate or a shared kitchen down the hall. That's enough for real food: microwaved rice with a can of beans and frozen vegetables is a full meal for a fraction of a fast-food combo, on both cost and what's in it. Cooking once a week and splitting the batch into containers means there's already food ready at 11pm, instead of a takeout order.
Social eating is its own budget line. A late-night food run with friends, a round of drinks, dessert because everyone else ordered one — none of it feels like a decision in the moment, but it's where a lot of the spending and the extra calories actually land. Keeping a shared snack stash in the room, so ordering out isn't the only option when the group gets hungry, works without turning down the plan.
Not all dried fruit is the same, either — texture and sweetness vary a lot by variety, which is worth knowing before buying in bulk (this comparison of taste and texture across varieties covers the differences). Buying from a proper supplier also matters for a food that's stored dry in bulk — basic safety and storage standards are worth checking before stocking a dorm room drawer for the semester.