How Expensive Is Your Diet?

Jan. 7, 2008 Special to ABCNEWS.com — -- There are fewer things more dreaded than the New Year's resolution.

For millions of Americans each year, that means deciding to drop a few--or tens --of pounds. It also means picking a diet from a number of confusing programs: low-fat, low-carb, high-protein, pre-made, points-counting, and so on. The options can be exhausting and once committed, it is hard to start over if the diet is less than compatible with your habits--and your bank account.

That's why we evaluated the first-week costs of seven popular weight-loss programs. After all, the initial week often requires the greatest personal and financial investment.

Click here to see more about the cost of diets at our partner site, Forbes.com.

We found that consumers on such programs as NutriSystem, the Zone, The Abs Diet, The 5-Factor Diet, South Beach, Weight Watchers and the Martha's Vineyard Diet Detox can expect to spend as little as $100 and as much as $385 during the first week.

Surprisingly, the diet with the fewest menu choices--the Martha's Vineyard Diet Detox--costs as much as Weight Watchers: Both totaled about $385. The 5-Factor Diet, engineered by celebrity trainer Harley Pasternak, came in a close third at $380. The price of supplements and a juicer were included for the detox diet, while the cost of membership added to the bottom line of joining Weight Watchers. At $98, NutriSystem was the cheapest option, but included only pre-packaged foods and no fresh fruits or vegetables.

The average American household spends $5,781 a year on food, not including alcohol and fast food items, according to the Census' latest Statistical Abstract, which surveyed 5,000 households of varying sizes. Assuming that purchasing habits remain relatively steady, a weekly household grocery bill likely averages about $111, though this may be significantly higher or lower given income and family size.

At any given time, millions of Americans are on a diet--and their dollars are in demand. The weight-loss market is fiercely competitive and reportedly exceeds $40 billion a year in revenue. As high-profile brands move away from identifying their plans as diets and instead as a lifestyle, companies will increasingly offer more options for personalization and taste preferences. In our roundup, there's room for everything from quesadillas to Canadian bacon to chocolate shakes.