New early-stage research suggests that some children’s fast fashion clothing may contain unsafe levels of lead, raising new concerns about hidden toxic exposure in everyday garments. The findings were presented at the spring meeting of the American Chemical Society.
The study, conducted by undergraduate researchers at Marian University, focused on brightly colored shirts purchased from several major retailers. Every item tested exceeded the U.S. federal safety limit for lead in children’s products, which is set at 100 parts per million.
Why Lead May End Up in Fabric
Lead has long been detected in metal clothing components such as zippers, snaps and buttons, occasionally leading to product recalls. However, the new research suggests that the fabric itself may also be contaminated, including clothing marketed specifically for young children.
According to project leader Kamila Deavers, some manufacturers may use lead(II) acetate as a low-cost chemical to help dyes bind to fibers and maintain bright colors. Researchers suggest this practice could be more common in fast fashion, where low prices and rapid production often take priority over long-term safety considerations.
The researchers found that bright shades — especially red and yellow — tended to contain higher lead levels than more muted colors in the tested garments. Although the sample size was relatively small, none of the clothing items fell below the legal threshold, highlighting the need for broader and more systematic testing across the industry.
Health Risks for Young Children
Lead exposure is considered unsafe at any level, particularly for children under the age of six. The U.S. Environmental Protection Agency and the Centers for Disease Control and Prevention have linked lead exposure to damage affecting the brain and nervous system, learning difficulties and behavioral problems.
Young children face greater risk because they frequently mouth, suck or chew on objects and clothing. Study co-author Cristina Avello noted that these common behaviors may provide a direct pathway for lead from contaminated fabrics to enter a child’s body.
Even relatively low but repeated exposure may accumulate over time and potentially raise blood lead levels enough to require medical monitoring. Health experts continue to emphasize that there is no known safe blood lead concentration for children.
Simulating Chewing and Everyday Exposure
To estimate how much lead children might absorb from contaminated clothing, the researchers recreated stomach-like conditions in the laboratory. They then measured how much lead could become bioavailable if a child sucked or chewed on the fabric.
Using those measurements, the team modeled common behaviors such as chewing on collars or holding sleeves in the mouth. Their analysis suggested that, in some scenarios, daily lead intake could exceed the U.S. Food and Drug Administration’s recommended limits for children.
Lead author Kamila Deavers emphasized that the calculations were conservative, meaning real-world exposure could potentially be even higher for some children. The team plans to expand the research to include more garments, fabrics and color varieties.
Questions About Washing and Environmental Spread
The researchers are also investigating whether washing contaminated clothes could spread lead to other garments or leave residue inside washing machines. Another concern is how detergents may interact with lead(II) acetate during repeated wash cycles.
Scientists warn that laundering contaminated clothing could potentially release lead into wastewater systems, contributing to broader environmental pollution. If washing machines accumulate lead residue over time, this may become an additional exposure route inside households.
Future experiments will explore whether higher lead concentrations in fabric consistently result in greater absorption in simulated biological fluids, and how quickly lead may leach out as clothing ages or deteriorates.
Pressure for Safer Manufacturing Methods
The findings add to growing pressure on fashion companies to adopt safer dye-fixation methods. Alternatives to lead-based compounds include natural mordants derived from tannin-rich plants such as oak bark or pomegranate peel, as well as alum, which is generally considered less harmful.
However, switching to safer production methods would likely require additional investment and manufacturing changes, something many fast fashion companies have been slow to implement. Researchers note that without stronger regulations or consumer pressure, companies may have limited motivation to overhaul existing supply chains.
Advocates argue that clearer labeling, regular independent testing and stricter enforcement of current standards could help reduce risks for children. Policymakers are also being urged to review current regulations and close loopholes that allow contaminated products to reach stores.
What Parents Can Do
Although the research remains in its early stages, experts advise parents to be cautious with very bright, inexpensive clothing sold for young children. Some pediatricians recommend choosing trusted brands, washing new garments before use and discouraging children from chewing on clothing.
Consumers can also monitor product recall notices and ask retailers about their testing policies regarding heavy metals. The Marian University research team says greater public awareness will be essential for driving change in a global fashion industry that often lacks transparency.
The project, funded by Marian University and the Sigma Zeta honor society, reflects broader efforts to identify hidden everyday sources of toxic exposure. Researchers hope their findings will contribute to stronger regulations and help families make more informed purchasing decisions.
