The median diet worked out to a costly $85.79 a week–that’s 58% more than the $54.44 the average single American spends on food. Our price calculations for the foods on each menu were done on a per-serving basis. Prices came from New York City-based online grocer Fresh Direct and were adjusted to the national average to control for any price differential.
Jenny Craig dieters were the hardest hit. A week’s worth of food, which includes Jenny Craig-supplied meals and supplemental snacks, cost $137.65. The informal (but for spokesman Jared Fogle, effective) Subway Sandwich Diet was the least expensive of the bunch, at $68.60 a week.