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http://www.cfsan.fda.gov/~rdb/opa-gras.html). 

During the period of 2000 through 2005, FDA responded to three GRAS notices for the use of carbon monoxide (CO) in modified atmosphere packaging (MAP) systems for meat products (GRNs 83, 143, and 167) and one notice for the use of “tasteless smoke,” (smoke filtered to remove the taste components), in tuna (GRN 15).   FDA responded by stating that the Agency does not question the basis for the GRAS determinations.  

FDA routinely consults with USDA’s Food Safety and Inspection Service (FSIS) to address our related, but separate, roles in the regulation of ingredients in meat.   Consistent with the process established in a Memorandum of Understanding for the review of ingredients used in the production of meat and poultry products, FDA consulted with FSIS on the three GRAS notices for use of CO in MAP systems for meat products.   While FDA has authority under the FD&C Act to determine the safety of ingredients used in food, FSIS has separate authority for determining whether the intended use of an ingredient in meat is suitable under the Federal Meat Inspection Act (FMIA).   FSIS also has responsibility for the labeling of meat products.   FSIS has informed FDA that the use of CO in MAP systems, under the conditions specified in the GRAS notices, complies with the FMIA. 

GRAS Notice for Tasteless Smoke

In a revised notice to FDA dated March 11, 1999, Hawaii International, Inc. submitted information that it had determined, based on scientific procedures, that the intended use of tasteless smoke to protect the taste, aroma, and color of seafood at levels sufficient to accomplish this purpose is GRAS (GRN 15).   The Agency limited its evaluation of Hawaii International’s notice to tuna.  

In our March 10, 2000, response stating that the Agency has “no questions” regarding the GRAS status of tasteless smoke, FDA clearly stated that Hawaii International, or any other party who markets tuna that has been preserved with tasteless smoke, is responsible for ensuring that such tuna is neither misbranded under sections 403(a), 403(i)(2) or 403(k) of the FD&C Act, nor adulterated under sections 402(b)(3) or 402(b)(4).

FDA stated that Hawaii International’s use of tasteless smoke constitutes use as a preservative, therefore, the ingredient statement on labels of tuna treated with the substance must, among other things, declare that the tuna is treated with tasteless smoke, and that it is used as a preservative.   In addition, the treated tuna may not be represented as “smoked,” nor identified as “fresh.” 

FDA’s response letter further stated that if the application of tasteless smoke causes the color of tuna flesh to be enhanced, potentially causing consumers to be misled about the true nature or value of the tuna, the product may be adulterated. 

FDA is aware of the concerns that the use of tasteless smoke or CO, one of its components, on tuna may prevent detection of potentially dangerous histamine formation in tuna.   FDA considered these concerns in responding to the GRAS notice and concluded that they were not scientifically sound.   Tasteless smoke and CO are effective in preventing the color change that routinely accompanies the freezing and thawing of tuna; however, color change is not a reliable means of screening out decomposed from non-decomposed fish, or of screening out histamine-containing from non-histamine-containing fish.   Color change routinely occurs as a result of the freezing and thawing process, unassociated with the kinds of abuse conditions that produce either histamine or decomposition.

The most effective means of detecting decomposed fish is by odor.   This is a highly effective tool for eliminating fish that are unfit for food because of decomposition.   This is the method used by FDA examiners and regulatory examiners around the world.   However, it has only limited utility in screening fish, such as tuna, for histamine content.   The type of abuse conditions that lead to fish decomposition (e.g., being held at low temperature for extended periods of time) often do not lead to histamine formation in fish, which is associated with high temperature abuse.   There is no scientific evidence that tasteless smoke or CO affects either the formation of histamine or the ability to detect histamine formation through sensory analysis.

Given the lack of a reliable relationship between odors of decomposition and levels of histamine, it is understandable that consumers on occasion eat fish that tastes fresh, but still become ill from high levels of histamine.   This has been a recognized public health problem for many years.   FDA has invested considerable research time and dollars to provide the seafood industry with the best possible guidance on how to prevent the hazard.   The seafood industry is required to address these public health issues by instituting Hazard Analysis Critical Control Point (HACCP) principles that help prevent abuse conditions that can lead to histamine formation. 

Illnesses can occur as a result of lapses in the implementation of these mandatory controls.   FDA takes these lapses seriously and uses its regulatory authorities to address them.   Testing of imported tuna, which is highly targeted to suspect lots, reveals elevated histamine levels in both untreated products and products treated with tasteless smoke and CO.   Nonetheless, if processors are using tasteless smoke or CO treatment to make decomposed fish look better, they are in violation of the adulteration provisions of the FD&C Act.   Enhancing the appearance of decomposed fish, however, does not inhibit FDA from uncovering such adulteration by sensory (odor) examination of lots at the border. 

GRAS Notice for Carbon Monoxide

In a notice to FDA (GRN 83) dated August 29, 2001, Pactiv Corporation stated its determination, through scientific procedures, that CO is GRAS for use as a component of a gas mixture in a MAP system.   The level of CO in Pactiv’s MAP system is 0.4 percent.   The other components of the MAP system are carbon dioxide (30 percent) and nitrogen (69.6 percent).   The MAP system is used for packaging fresh cuts of case-ready muscle meat and ground case-ready meat to maintain wholesomeness, provide flexibility in distribution, and reduce shrinkage. 

In its response dated February 21, 2002, FDA stated that based on the information provided by Pactiv, as well as other available information, the Agency had no questions regarding Pactiv’s conclusion that CO is GRAS under the intended conditions of use.  

FDA responded to two other GRAS notices for the use of CO in MAP systems for meat, stating that it had no questions regarding the sponsors’ GRAS determinations.   These notifications, which incorporated the information in the Pactiv notification by reference, were from Precept Foods, LLC (FDA response of July 29, 2004) and Tyson Foods, Inc. (FDA response of September 29, 2005).   In its review of each of these GRAS notices, the Agency carefully considered the information provided by the notifier, as well as all other available relevant information in reaching the decision not to challenge the notifiers’ determinations that their uses were GRAS.  

We are aware that concerns have been raised about the possible misuse of CO in seafood and about the use of CO-containing MAP systems for meat.   Agency regulations provide for a mechanism whereby parties seeking reconsideration of FDA decisions can make available to FDA data and information in support of their request.   Indeed, FDA has received citizen petitions which challenge FDA’s acceptance of the GRAS status of CO-containing MAP systems and of tasteless smoke.   We continue to receive information relevant to the citizen petitions and to GRNs 15, 83, 143, and 167, and are currently reviewing that information. 

CONCLUSION

Ensuring that FDA-regulated products are safe and secure is a vital part of FDA’s mission – to protect and promote public health.   Changes in consumer preferences, industry practices, and the rising volume of imports have posed challenges that required us to adapt our current food protection strategies.   The Food Protection Plan provides an updated approach to ensure that the U.S. food supply remains one of the safest in the world.   The Plan will help prevent harm before it can occur, will provide enhanced intervention measures, and improve our ability to respond to food safety threats. 

FDA remains committed to working closely with all of its partners to implement the Plan’s measures to protect the nation’s food supply.   We look forward to working with the Members of this Committee and the entire Congress to obtain passage of the requested legislative authorities identified in the Food Protection Plan and the Import Safety Action Plan.   Thank you for the opportunity to discuss FDA’s activities to enhance food safety.   I would be happy to answer any questions.

Last revised: August 29,2008