It is often times more expensive to be thin when you add it all up.

Healthier food is more expensive.
Gym equipment and memberships are pricy.
You will probably spend more on clothes, hair, nails, shoes, vacations, new hobbies, dating etc.

Hopefully the cost is offset by some other expenses like fast food, medical bills, therapists for depression etc


I choose to pay more to be thin and enjoy life.
It always makes sense to make the food as cost effective as possible though....by shopping sales etc