Labeling of Genetically Modified Foods

Labeling of Genetically Modified Foods

Order Code RS20507
Updated January 18, 2001
CRS Report for Congress
Received through the CRS Web
Labeling of Genetically Modified Foods
Donna U. Vogt
Domestic Social Policy Division
Summary
Congressional interest in the labeling of genetically modified foods (GM foods) has
been rising. Congress took no action on the two bills introduced into the 106th Congress
to mandate labeling of all genetically modified crops (GM crops) and foods, but will
likely debate other proposals in the 107th Congress. The Food and Drug Administration
(FDA) issued its current GM food labeling policy in May 1992. At that time, the agency
determined that it would regulate GM foods no differently than foods created by
conventional means because FDA considered them substantially equivalent to traditional
foods and decided that no special label would be needed. In the intervening period,
extensive public debate surrounding the genetic modification of foods has led some
consumers to call for labeling of such products. On January 18, 2001, FDA published
a draft guidance for industry on voluntary efforts to label GM foods. A label would
permit consumers to choose to avoid purchasing or consuming them. At the same time,
the agency proposed a rule that would make mandatory the current voluntary
consultation process whereby the industry would have to formally notify the agency 120
days before releasing a food product onto the market and would have to supply certain
safety test data to FDA. The federal government’s role in regulating these foods is
explained in CRS Report RL30198, Food Biotechnology in the United States: Science,
Regulation, and Issues. Many oppose labeling because to make such labels “truthful and
not misleading” all commodities would need to be segregated and tested, and the label
would not have room to impart information that could not be distributed in other ways.
This report focuses specifically on views surrounding the labeling of GM foods. It will
be updated periodically as new legislative proposals are introduced.
Introduction
Questions about the safety of bioengineered foods or genetically modified foods (GM
foods) have led a variety of observers (consumers, Members of Congress, food companies,
and international environmental negotiators) to support the labeling of GM foods. These
foods were developed using recombinant DNA and related techniques to alter the genetic
makeup of living organisms that are destined for human consumption. These techniques
allow scientists to identify and isolate one organism’s genes for useful traits and insert
them into another plant or animal. Although some of the modifications made by
bioengineering could be accomplished through traditional breeding methods, these newer
Congressional Research Service ˜ The Library of Congress

CRS-2
techniques are more precise and predictable, can use genes from other species, and
developers can create seeds having the desired traits faster than traditional methods.
Currently, GM food crops planted and marketed by U.S. farmers include beets, corn,
canola, cotton, rice, tomatoes, potatoes, soybeans and others. Each of these food
products has been modified with added herbicide-tolerance and/or insect-resistance traits.
Because of their unique nature, GM foods cross traditional regulatory regimes and involve
several agencies with food safety mandates, including the FDA, the Department of
Agriculture (USDA), and the Environmental Protection Agency (EPA), although only the
FDA is in charge of regulating food labels.
Labeling of GM foods is being debated in Congress and in public forums. Two bills
in the 106th Congress would have required mandatory labeling for all foods containing at
least 0.1% ingredients of genetically modified organisms (GMOs).1 In late 1999, FDA
held three public meetings to solicit views on the most appropriate way to inform the
public about GM foods. The views expressed at the meetings about labeling GM foods
were described as polarized between those who wanted labeling and those who did not.2
Bills are expected to be introduced in the 107th Congress that would mandate labeling.
Bioengineered foods shipped overseas will soon need documentation identifying them
as such. On January 29, 2000, delegates from 140 governments finalized the Cartagena
Protocol, known as the Biosafety Protocol.3 It requires exporters of bioengineered
commodities used for food, feed, or for processing to label shipments with a declaration
that the product “may contain” GMOs and that the products are not intended for release
into the environment. The Protocol does not require exporters to segregate bioengineered
products from traditional products. Some say this documentation is not “labeling” but a
shipping documentation. A State Department spokesman stated that the Protocol was “a
step toward depolarizing the debate about biotechnology.”4

Supporting and opposing views on the wider issues concerning the value and
acceptance of GM foods are discussed in CRS Report RL30198, Food Biotechnology in
1 One bill spelled out a system for each stage of food production whereby all persons with custody
over the food (including the seed company, farmer, and food manufacturer) would have to label
foods they know contain GMOs. If the food does not contain GMOs, they would have to issue a
guaranty that the food does not contain GMOs. If the custodian of the food gave a false guaranty,
there would be civil penalties up to $100,000 for each violation.
2 Statement by Joseph A. Levitt, Director, Center for Food Safety and Applied Nutrition, Food and
Drug Administration, Department of Health and Human Services before the Senate Health,
Education, Labor, and Pensions Committee, September 26, 2000.
3 On June 4, 1993, President Clinton signed the Convention on Biological Diversity, an
international agreement negotiated at the 1992 Earth Summit in Rio de Janeiro under the auspices
of the United Nations. This diversity agreement, ratified so far by 174 countries but not by the
United States, calls for protecting a variety of plants and animals found in the wild. A second
meeting in Indonesia in November 1995, at the Conference of the Parties to the Convention on
Biological Diversity (COP-2), countries agreed to fund negotiations for a “biosafety protocol.”
4 Pollack, Andrew. “130 Nations Agree on Safety Rules for Biotec Food.” New York Times,
January 30, 2000. p. A1 and A6. Also see CRS Report RL30594, Biosafety Protocol for
Genetically Modified Organisms: Overview, by Alejandro E. Segarra and Susan R. Fletcher. July
5, 2000.

CRS-3
the United States: Science, Regulation, and Issues. This paper briefly describes FDA’s
food labeling policies and its policy rationale regarding the labeling of GM foods. It also
discusses gives the views of supporters and opponents of labeling.
Current FDA Labeling Policies
FDA is responsible for establishing standards for the labeling of all foods except for
meat, poultry, and some egg products. The Federal Food, Drug, and Cosmetic Act
(FFDCA) gives FDA broad authority to regulate foods by prohibiting the entry into
interstate commerce of adulterated or misbranded foods. It is the legal responsibility of
food manufacturers to produce foods that are not adulterated, unsafe, filthy, or produced
under unsanitary conditions. The Act also requires that “food additives” not be marketed
unless they have FDA’s approval or are considered generally-recognized-as-safe (GRAS).5
FFDCA prohibits (in §403 Misbranded Food) statements in labels or labeling that are
“false or misleading in any particular,” and requires disclosure of “material” information
on the label which gives the statement of identity or common/usual name of the food; the
quantity of contents; the name and place of business of manufacturer, packer, or
distributor; the ingredient information including any additives; and nutrition information.
FDA does not require, however, prior approval for food labels nor does the FFDCA
authorize FDA to require label warnings on food products, although the presence of a
potential allergen must be included. FDA also gives informal advice to food manufacturers
on labeling, if asked, and issues threats of enforcement actions against products whose
labels fail to comply with regulatory requirements.
Current FDA Labeling Policy for GM Foods
FDA determined in May 1992 that the scientific and regulatory issues posed by
bioengineered food are not substantively different from those raised by non-bioengineered
foods. Thus, FDA generally regulates GM foods no differently than foods created by
conventional means. Nevertheless, FDA determined that there could be circumstances
with GM foods that would require special review.6 These are:
! the gene transfer produces unexpected genetic effects;
! the levels of toxicants in the food are significantly higher than present in
other edible varieties of the same species that have not been modified;
! nutrients in the bioengineered food differ from those in traditional
varieties;
! the sources of the newly introduced genetic material come from a food
plant associated with allergies found in humans;
! the food from the new variety differs significantly in composition from
food of non-modified varieties;
5 Affirmation petitions for “generally-recognized-as-safe” (GRAS) status must be filed to gain
FDA’s formal agreement with a sponsor’s independent determination that a substance is GRAS.
A manufacturer may file a food additive petition even if FDA considers a substance GRAS.
6 U.S. Food and Drug Administration. Statement of Policy: Foods Derived From New Plant
Varieties. Federal Register, v. 57, no. 104, May 29, 1992. p. 22984-23005.

CRS-4
! the food contains marker genes that theoretically could reduce the
therapeutic effects of clinically useful antibiotics;
! the modified plants are developed to make substances like
pharmaceuticals or polymers, as well as food; or
! the food is to be used for animal feed and has changes in nutrients or
toxicants from the non-modified version.
An example of this special review process focused on the Flavr Savr tomato. In a
effort to keep tomatoes fresher and longer on the vine, the Calgene Corporation
genetically modified a strain of tomato to reduce activity of a particular enzyme
(polygalacturonase) that affects softening of outer tissue during ripening. Because
Calgene used an antibiotic marker as part of the modification process, a small amount of
a non-tomato protein was produced in the Flavr Savr tomato. FDA viewed that protein
as a food additive since it would not be found in an unmodified tomato and therefore,
changed the tomato’s composition. As a result, Calgene petitioned FDA and gained food
additive approval for the protein in May 1994. Once approved, all labels listed the protein
as an ingredient. In other cases, the composition of the GM product was deemed different
enough from its unmodified counterpart to necessitate a different label. For example, FDA
required the renaming of a soybean oil whose fatty acid composition had been altered by
engineering. The new name, “high oleic acid “ describes differences in the oil but not its
production method.
On January 18, 2001, FDA published in the Federal Register a “Draft Guidance for
Industry: Voluntary Labeling Indicating Whether Foods Have or Have Not Been
Developed Using Bioengineering” and is seeking comments. In this document, FDA
reaffirmed that it would not require special labeling of all bioengineered foods because the
use of bioengineering, or its absence, does not itself cause a material difference in the food.
However, the agency did suggest that because of the strongly divergent views on labeling,
manufacturers may consider providing more information about bioengineered food. The
information given, however, must be shown to be truthful and not misleading. To avoid
false or misleading statements about the absence of bioengineered ingredients (because
there are no established threshold levels of bioengineered constituents or ingredients in
foods), or to avoid implying that one food is superior to others, FDA suggests not using
statements such as “GM free” or “biotech free.” The agency does suggest the word
“biotechnology” is preferred by some consumers over “genetic engineering” or “genetic
modification.” It also claims that if validated testing is available, it can used to verify
whether the label is true. Or manufacturers could keep records to document the reasons
why a food’s label is truthful. On the same day, FDA published a proposed rule that
would make mandatory the current voluntary consultation process whereby the industry
would have to formally notify the agency 120 days before releasing a food product onto
the market and would have to supply safety test data to FDA.
Views on Labeling of Genetically Modified Foods
Most consumers are very sensitive to the safety of the food they and their families eat
and want to be confident that the food products they consume are wholesome and will
cause them no harm. Most U.S. consumers trust FDA to ensure the safety of all foods
whatever method was used to produce them. However, some concerned consumers,
supported worldwide by various environmental groups including Greenpeace, question
whether GM foods have been tested properly to ensure their safety from risks such as

CRS-5
unknown allergens or toxins or for potential impact on the environment and biodiversity.
They believe that government agencies should carefully review and approve the data from
safety tests conducted by developers of GM foods. They also believe that foods produced
through this technology could radically change the food supply of this country. These
consumers and others have demanded the “right-to-know” which foods have been
bioengineered. They want access to information on a label that would allow them to
identify these products.7 Supporters of labeling these foods claim that such labeling would
allow them to have the knowledge to choose to avoid their purchase or consumption.8
Other supporters compare this labeling with knowing how much fat is in a food product.
To them, a label is not automatically a danger or hazard claim. They just want to know
that the food they are eating was made through bioengineering.
Other consumers support mandatory labeling due to religious, ethical, or other strong
personal values. These consumers, who routinely purchase specialty foods produced and
labeled to abide by religious law or environmental concern, are accustomed to foods which
identify their production process, i.e., certified kosher, halal, or organic production, on
their label. These consumers want the GM production process identified so they can
distinguish these products from those produced without the use of this technology.
Labeling would allow these consumers the opportunity to choose to avoid certain foods.
Most seed producers, farmers, and food manufacturers oppose government mandated
labeling requirements. They maintain that since companies producing seeds or plants
already test products extensively for safety, and strive to maintain the reputation of their
brands, labeling is unnecessary. They also claim that their compliance with FDA’s 1992
GM labeling policy ensures that should the GM food contain any modification in nutrients,
toxins, or allergens from traditional foods, it would be labeled as such.
Many who oppose mandatory labeling also claim that such a policy would constitute
a significant restraint on trade if producers want to make a “GM-free” claim. As
suggested in the draft guidance described above, FDA does not recommend this type of
claim. To verify such a claim, commodities would have to be separated into two lots:
those produced from GM seed and those produced from conventional seed. To provide
accurate information and compliance, elaborate and costly record keeping systems of
segregating bioengineered foods would be needed at all stages of production (including
7 In 1996, in a ruling which applies only to three states, Vermont, Connecticut, and New York, the
U.S. Court of Appeals for the Second Circuit held that food labeling cannot be compelled just
because consumers want the “right-to-know” information. In overturning a Vermont law that
required labeling of dairy products from cows treated with recombinant bovine somatotropin
(BST), the court found that such regulation to satisfy the public’s “right to know” is a
constitutional violation of commercial free speech. The court wrote, “Were the consumer interest
alone sufficient, there is no end to the information that states could require manufacturers to
disclose about their production methods .... Absent, however, some indication that this information
bears on a ... human health or safety concern, the manufacturers cannot be compelled to disclose
it. Instead, those consumers should exercise the power of their purses by buying products from
manufacturers who voluntarily reveal it.” International Dairy Foods Association, et al. v.
Amestoy, 92 F. 3d 67 (2nd Cir. 1996) and in Henry I. Miller, “Genetic Engineering,” Science, v.
284, no. 5419, May 28, 1999. p. 1471-1472.
8 U.S. Department of Agriculture’s final rule for the labeling of organic foods will provide
consumers with a food supply that does not contain GM foods.

CRS-6
seed development, planting, harvesting, distribution, processing, and packaging). Because
of the pervasive use of bioengineered foods in food production, such segregation and
traceability would also require extensive DNA testing at each step of the food production
process and third party verification (either by the government or the private sector) of the
final product. By imposing segregation and testing on the entire agricultural system, costs
of providing this information would increase. In addition, the increase in the unit costs
within the food system, might make small firms less viable and encourage industry
consolidation.9
In September 2000, StarLink corn containing a Cry9C protein, a protein approved
only for use in animal feed, turned up in taco shells. Without approval for human use, or
exemption from approval, the Cry9C protein is considered an adulterant. The current
regulatory system would still not necessarily have caught this adulterant in human food,
even if there had been a mandatory labeling program. In December 2000, FDA published
a sampling and testing guidance for the industry so that testing results could be used to
verify the labeling of corn with or without the Cry9C protein.
Other opponents of GM food labeling are concerned about the risk of “crowding out”
or confusing other important information on the product label. Because the presence of
too much information on a label makes it difficult to effectively transmit knowledge about
potential concerns, they believe that adding what they deem as extraneous information on
the label could have negative effects. Opponents of labeling also have hypothesized that
consumers who know little about the issue might assume that any information included on
a label constituted an implied hazard warning. As a result, if GM products are so labeled,
these consumers might avoid them based on a judgement of implied risk.
Many industry groups support the current voluntary labeling policy towards GM
foods which allows manufacturers to label voluntarily features that appeal to consumers,
as long as they are truthful and not misleading, and could satisfy consumer desires for label
information. However, these groups also claim that a label is limited as to the level of
detail it can contain. Since different consumers care about different things and all
information cannot be given on a label, some groups have suggested that information could
be provided through a variety of sources. Some food industry groups are particularly
interested in having FDA create guidelines and quantitative thresholds for “GM free”
claims so this label can be verified, can be considered truthful, and not somehow imply that
GM foods may be unsafe. With such controversy surrounding consumer acceptance of
these GM foods and their labeling, some industry groups are questioning whether they
want to use GM products in their retail foods.10
9 “Biotech Crops Hold Potential to Increase Food Prices, says Fed.” SCI Policy Report, January
3, 2000.
10 Food industry manufacturers always consider whether any new food has an obvious consumer
benefit, makes the food function better, or would make a difference in sales.