Definitions of Food Security

This page provides the following information:

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Ranges of Food Security and Food Insecurity

In 2006, USDA introduced new language to describe ranges of severity of food insecurity. USDA made these changes in response to recommendations by an expert panel convened at USDA's request by the Committee on National Statistics (CNSTAT) of the National Academies. Even though new labels were introduced, the methods used to assess households' food security remained unchanged, so statistics for 2005 and later years are directly comparable with those for earlier years for the corresponding categories.

USDA's labels describe ranges of food security

Food Security
  • High food security (old label=Food security): no reported indications of food-access problems or limitations.
  • Marginal food security (old label=Food security): one or two reported indications—typically of anxiety over food sufficiency or shortage of food in the house. Little or no indication of changes in diets or food intake.
Food Insecurity
  • Low food security (old label=Food insecurity without hunger): reports of reduced quality, variety, or desirability of diet. Little or no indication of reduced food intake.
  • Very low food security (old label=Food insecurity with hunger): Reports of multiple indications of disrupted eating patterns and reduced food intake.

CNSTAT Review and Recommendations

USDA requested the review by CNSTAT to ensure that the measurement methods USDA uses to assess households' access—or lack of access—to adequate food and the language used to describe those conditions are conceptually and operationally sound and that they convey useful and relevant information to policy officials and the public. The panel convened by CNSTAT to conduct this study included economists, sociologists, nutritionists, statisticians, and other researchers. One of the central issues the CNSTAT panel addressed was whether the concepts and definitions underlying the measurement methods—especially the concept and definition of hunger and the relationship between hunger and food insecurity—were appropriate for the policy context in which food security statistics are used.

The CNSTAT panel:

The CNSTAT panel also recommended that USDA make a clear and explicit distinction between food insecurity and hunger.

  • Food insecurity—the condition assessed in the food security survey and represented in USDA food security reports—is a household-level economic and social condition of limited or uncertain access to adequate food.
  • Hunger is an individual-level physiological condition that may result from food insecurity.

The word "hunger," the panel stated in its final report, "...should refer to a potential consequence of food insecurity that, because of prolonged, involuntary lack of food, results in discomfort, illness, weakness, or pain that goes beyond the usual uneasy sensation." To measure hunger in this sense would require collection of more detailed and extensive information on physiological experiences of individual household members than could be accomplished effectively in the context of the CPS. The panel recommended, therefore, that new methods be developed to measure hunger and that a national assessment of hunger be conducted using an appropriate survey of individuals rather than a survey of households.

The CNSTAT panel also recommended that USDA consider alternative labels to convey the severity of food insecurity without using the word "hunger," since hunger is not adequately assessed in the food security survey. USDA concurred with this recommendation and, accordingly, introduced the new labels "low food security" and "very low food security" in 2006.

For more information on CNSTAT Recommendations...

Characteristics of Households With Very Low Food Security

Conditions reported by households with very low food security are compared with those reported by food-secure households and by households with low (but not very low) food security in the following chart:

Percentage of households reporting indicators of adult food insecurity in 2018

Download chart data in Excel format

The defining characteristic of very low food security is that, at times during the year, the food intake of household members is reduced and their normal eating patterns are disrupted because the household lacks money and other resources for food. Very low food security can be characterized in terms of the conditions that households in this category typically report in the annual food security survey.

  • 98 percent reported having worried that their food would run out before they got money to buy more.
  • 97 percent reported that the food they bought just did not last, and they did not have money to get more.
  • 96 percent reported that they could not afford to eat balanced meals.
  • 97 percent reported that an adult had cut the size of meals or skipped meals because there was not enough money for food.
  • 90 percent reported that this had occurred in 3 or more months.
  • 94 percent of respondents reported that they had eaten less than they felt they should because there was not enough money for food.
  • 69 percent of respondents reported that they had been hungry but did not eat because they could not afford enough food.
  • 47 percent of respondents reported having lost weight because they did not have enough money for food.
  • 32 percent reported that an adult did not eat for a whole day because there was not enough money for food.
  • 25 percent reported that this had occurred in 3 or more months.

All households without children that were classified as having very low food security reported at least six of these conditions, and 70 percent reported seven or more. Food-insecure conditions in households with children followed a similar pattern.

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