Food

Lead in Food, Foodwares, and Dietary Supplements

The FDA monitors and regulates levels of lead in certain foods, foodwares, dietary supplements, and cosmetics, because of its potential to cause serious health problems. Originating in the earth's crust, lead in the soil is naturally occurring.  Though most intentional uses of lead are now banned in the United States, previously lead was used in a variety of products and processes.  For example, lead was added to household paints, used in soldering plumbing and cans, and added to gasoline and pesticides.  Lead is still often used in products made in other countries.

Lead occurs in foods because of its presence in the environment. Lead in the soil can settle on or be absorbed by plants grown for fruits or vegetables or plants used as ingredients in food, including dietary supplements. Lead that gets into or on plants cannot be completely removed by washing or other food processing steps. Lead in plants or water may also be ingested and absorbed by the animals we eat, which is then passed on to us. It is also possible for lead to enter the food supply inadvertently through manufacturing processes. For example, plumbing that contains lead can contaminate water used in food production. Some pottery and other food contact surfaces containing lead can pass or leach lead into food or drinks when food is prepared, served, or stored in them.

Lead, like other heavy metals, does not biodegrade or disappear from the environment over time. Although lead levels in the food supply decreased dramatically between the 1970s-1990s, low levels of lead continue to be detected in some foods due to the continued presence of lead in the environment. Because it is not possible to remove or completely prevent lead from entering the food supply, our goal at the FDA is to limit consumer exposure to lead in foods to the greatest extent practical through regulation, monitoring and testing.

Lead is poisonous to humans and can affect people of any age or health status. Lead is especially harmful to vulnerable populations, including infants, young children, pregnant women and their fetuses, and others with chronic health conditions. High levels of lead exposure can seriously harm children's health and development, specifically the brain and nervous system. Neurological effects from high levels of lead exposure during early childhood include learning disabilities, behavior difficulties, and lowered IQ. Because lead can accumulate in the body, even low-level chronic exposure can be hazardous over time.

Lead exposure is measured by testing for the level of lead in a person's blood. There is no identified safe blood lead level. However, the Centers for Disease Control and Prevention (CDC) recommends that doctors begin monitoring children who have a blood lead level measured as 5 micrograms per deciliter (µg/dL). At this level it is recommended parents, doctors, public health officials, and communities take steps to reduce the child's future exposure to lead.

The FDA's Center for Food Safety and Applied Nutrition (CFSAN) monitors lead levels to inform FDA guidance and enforce FDA rules. Testing may be targeted to a specific food group, such as food commonly eaten by infants and toddlers, or to a specific food or food additive. Testing may also be conducted in response to reports of elevated lead levels in certain foods, including dietary supplements, such as the FDA's 2008 Survey on Lead in Women's and Children's Vitamins.

Interim Reference Level

The FDA assesses whether the amount of lead in a food product is high enough to raise a person’s blood lead level to a point of concern. To do this, the agency establishes a maximum daily intake for lead, called the Interim Reference Level (IRL). In determining the IRL, the FDA takes into account the amount of a particular food a person would need to consume daily, as well as other factors, that would result in blood lead levels of of 5µg per deciliter, the level at which the CDC recommends clinical monitoring of lead exposure in children. The FDA has established the current IRL at 3 µg per day for children and 12.5 µg per day for adults. These levels allow for differences across populations and are set nearly ten-times less than the actual amount of intake from food required to reach the CDC’s blood reference level. The adult level is particularly important for women of childbearing age, to protect against possible fetal exposure in women who are unaware that they are pregnant, and against infant exposure during nursing. The FDA will continue to research and evaluate the health effects and dietary exposure to lead and will update the IRL as appropriate.

Total Diet Study

A long-standing way that the FDA has monitored lead and other toxic elements in foods is through the Total Diet Study (TDS). Several times a year, FDA staff buy, prepare, and analyze about 280 kinds of foods and beverages that represent the foods U.S. consumers eat. These data are analyzed for hundreds of contaminants and nutrients to estimate on average how much the entire U.S. population, some subpopulations, and each person consumes of these elements each year. Since it began in 1961 to measure radioactive contamination, it has been extended to include pesticide residues, industrial and other toxic chemicals, and nutrient elements in food. The FDA uses the TDS results to help guide areas of focus for our food-safety and nutrition programs.

Toxic Elements in Food and Foodware Compliance Program

The FDA also monitors foods that can be a significant dietary source of certain toxic elements under the Toxic Elements in Food and Foodware, and Radionuclides in Food Compliance Program. For lead, the FDA places particular emphasis on foods that may be significant sources of lead in the diets of children.

To implement the program, FDA staff collect samples of selected foods and analyzes them for specific elements based on a set collection schedule for both seafood and non-seafood. If laboratory results are found to exceed the normal concentrations in these foods, they are brought to the attention of CFSAN. CFSAN evaluates these situations on a case-by-case basis and may recommend additional action, as appropriate.

International Scientific Activities

FDA experts participate in an international standard-setting body, Codex Alimentarius Commission (Codex). The purpose of Codex is to protect the health of consumers and promote fair trade practices by adopting scientifically based standards, guidelines, and codes of practice across all areas of food safety and quality. Its work includes reviewing the scientific data concerning lead and other contaminant levels in foods. These international discussions can lead to recommendations for standards individual countries may adopt.

Through the FDA's regulatory authority under the Federal Food, Drug, and Cosmetic Act we limit levels of lead, as well as other contaminants, in bottled water by establishing allowable levels. To limit the amount of lead that may leach into foods from tableware, the FDA sets allowable levels used in glazed ceramic pottery (for use in serving, storing and preparing foods) and silver flatware and tableware and established labeling requirements for ornamental and decorative ceramicware containing lead. These ceramicwares must contain a specific label identifying the danger of using it with food. To further reduce lead exposure in small children, the FDA has issued recommended guidelines to industry on specific foods and drinks more likely to be consumed by small children, including candy and juice.

In 2017, the FDA created the Toxic Elements Working Group, in part, to reevaluate the methods for determining when the FDA should take action with respect to measured levels of lead in particular foods, including those consumed by infants and toddlers. This comprehensive effort is informed by current research as well as input from food manufacturers and public health advocates.

The FDA has also taken actions to identify foods or food contact surfaces that may pose an increased risk for lead exposure. The FDA has issued several import alerts preventing certain imported products from entering the U.S. based on their history of high lead levels. These import alerts include an import alert for dried fruits, an import alert for toxic elements in juice and juice concentrate, an import alert for spices and spice products, and an import alert for dietary supplements that may have lead, arsenic, mercury, and/or cadmium. To help increase the likelihood that ceramic tableware imported from China meets it U.S. safety standards, the FDA has a memorandum of understanding with the Certification and Accreditation Administration of the People's Republic of China. The FDA also issued guidance to industry in response to mislabeled traditional pottery as "Lead Free" imported from Mexico.

The FDA has the authority to take enforcement action on a case-by-case basis where foods, including dietary supplements and spices, are found through routine or targeted testing to have levels of lead that may pose health concerns.

 

Page Last Updated: 11/08/2018
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