Written By: Gloria Tsang, RD
Title: Founding Registered Dietitian
Alumni: University of British Columbia
Last Updated on:
On August 21, 2008, the FDA approved irradiation on iceberg lettuce and spinach. Food irradiation has always been a controversial subject. So, is it safe?
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Food irradiation involves exposing foods to ionizing radiation to destroy harmful bacteria and other organisms. This process does not significantly raise the temperature of the food or contribute to any noticeable loss of nutrients. Food irradiation cannot prevent food borne bacteria from coming in contact with food after the irradiation process has taken place.
In the United States, there is a 50- year history of scientific research and testing on food irradiation. In 1955 the U.S. army medical department began to assess the safety of irradiated foods. FDA approval for irradiation of specific foods soon followed, including:
To date, unlike the United States, Canada does not permit food irradiation on meat or fresh produce.
Myth 1: The product will become radioactive.
Myth Busted: Not true – the product will contain no radioactive elements.
Myth 2: The nutrient loss will be significant (especially Vitamins B and C)
Myth Busted: Studies reviewed by the American Dietetic Association have shown that nutrient loss was “small and often substantially less than other methods of preservation.” In fact, any nutrients lost are approximately equivalent to levels that are lost when cooking the food.
Those who avoid purchasing irradiated food do so as a personal choice. However, as stated by the Center for Science in the Public Interest, scientists feel that the use of food irradiation is not a “silver bullet” for food safety. Instead, there should be very strict practices from the farm to the table so that everyone is following proper food safety guidelines. Even if a food has been irradiated, it should still be washed. Remember to always read food labels to check and see if food has been irradiated. All foods sold at the retail level that are treated with irradiation are required to include the radura symbol, or display “treated by irradiation” or “treated with radiation” somewhere on the packaging.
Many government agencies in the United States endorse irradiation, including:
Alumni: University of British Columbia – Gloria Tsang is the author of 6 books and the founder of HealthCastle.com, the largest online nutrition network run by registered dietitians. Her work has appeared in major national publications, and she is a regularly featured nutrition expert for media outlets across the country. The Huffington Post named her one of its Top 20 Nutrition Experts on Twitter. Gloria’s articles have appeared on various media such as Reuters, NBC & ABC affiliates, The Chicago Sun-Times, Reader’s Digest Canada, iVillage and USA Today.