Cooking at home is cheaper and better for you

ur mission is to get people back into the kitchen, eating real food that's great for you. Today's research seems to validate that goal - with the bonus that eating at home is shown to be cheaper, as well.

The Seattle Obesity Study surveyed 437 adult men and women who did the bulk of the food shopping in their household (Am J Prev Med 2017;52(5):616-624). Not only were they asked to estimate how often, on average, they and members of their family ate outside the home, they were also asked how much they spent on food (including both at home and away from home). Further, they responded to a dietary questionnaire regarding their diet as a whole that the authors could then score against the USDA's Healthy Eating Index (HEI 2010), which measures how well one's diet adheres to the Dietary Guidelines for Americans. Scored from 0 to 100, a higher score means a greater adherence.

In analyzing the data, the authors took into account not only age, gender, race/ethnicity, marital status, and number of people in the household, but also income, education, and employment status (employed versus unemployed).

Somewhat unsurprisingly, those who were unmarried, lived alone, or did not have children ate out most often. About half of all respondents reported eating at home "frequently" (6 or more times per week), with one third cooking 4-5 times per week. (It's encouraging to see that only 15% of the sample said they cooked 3 or fewer times per week - that's a lot of eating out.) Those who were married, had more people in the household (adult or child), had at least one child in the household, or were unemployed were more likely to eat at home more often.

Also unsurprisingly, at least for me: eating at home more often meant a better HEI 2010 score, with those who ate at home frequently having an average score 7 points higher than those who ate at home rarely. The authors looked at the various components of the HEI score and found that those who ate at home consumed fewer total calories, fewer empty calories, and less sodium than those who ate out, with the amount of total protein in the diet being the only component that was about the same between eating at home or away from home.

Finally, those who cooked at home spent most of their total food expenditures on foods they would eat at home: only 23% of their total food budget was spent on food eaten away from home. By contrast, those who ate out the most didn't spend their money in the same proportion of home versus away: 53% of their food money was spent at home, while 47% was spent away from home. Overall, those who ate at home the most spent 17% less on their food bills each month than those who ate out the most.

What this means for you

The message is clear: it's cheaper and better for you to cook your own food.

First posted: May 3, 2017