The objects that surround us inspire confidence by their daily use. Toys, decorated glasses, lipsticks or baby cookies make up a familiar landscape, rarely associated with the danger. However, behind this apparent safety, an invisible reality persists. Lead in everyday products continues to circulate at low noise, sometimes escaping from standards or controls, and asking questions of public health that science alone is no longer enough to contain.
Lead is also present in new products, made in countries with more flexible regulations. The American organization Center for Environmental Health confirmed in 2017 that some glass bottles sold in the United States displayed lead contents above 4000 ppm in the painting of their measurements, well beyond the recommended threshold for children. Globally, these residues can come from the supply chain, raw material or manufacturing processes.
In the case of ancient objects, contamination is often explained by the absence of standards at the time of their conception. But some recent articles still escape controls, such as the cups of the Green Spruts brand. The risk is therefore not limited to obsolete or forgotten objects in an attic.
Lead in food products is not always a health risk
The case of food is more complex. Lead can be found there through the floors, irrigation water, or even transformation equipment. This is why even organic or artisanal products can contain them. In 2019, the Canadian Food Inspection Agency revealed that 67% of the 985 food samples analyzed contained lead, but in proportions deemed without danger. For its part, the Healthy Babies Bright Futures study shows that 94% of the 168 baby foods tested contained lead, often associated with other heavy metals such as cadmium or arsenic.
These data seem alarming, but they deserve a rigorous reading. Everything is based on the really absorbed quantity. For the same food, the level of danger depends on the concentration of metal, the frequency of consumption, but also on the age of the exposed person. Health Canada stresses that current lead rates in marketed foods are generally too low to cause harmful health effects.
In children, lead absorption remains a major source of concern. Indeed, even a moderate but continuous exposure can harm brain development. From 10 micrograms per decilitre, cognitive effects can already appear. Rather than targeting total elimination, which seems unrealistic, it is better to reduce the exposure accumulated over time.
Towards a coherent regulation between exposure and real toxicity
Today, a discrepancy persists between scientific detection of lead and the perception of real risk. Certain tests such as those carried out by Tamara Rubin make it possible to identify tiny concentrations in an object or a food, without indicating if the metal can be absorbed by ingestion or skin contact. According to SNOPES, the use of the XRF spectrometer is a reliable method to detect lead, but it remains a first step. It is the analysis of the migration of the metal to the body which makes it possible to assess the danger. However, the regulations are still struggling to integrate this nuance. Many products escape any supervision, including those intended for children.
Experts therefore call for harmonization of standards based on the cumulative effects of heavy metals. The study conducted by ABT Associates for Healthy Babies Bright Futures believes that lead and arsenic present in food could represent up to 20% of IQ losses noted in American children before the age of two. A proportion that militates for an integrated risk approach, taking into account the cocktail effect of several contaminants present at low doses.
Pending real reforms, researchers highlight several gestures that are easy to implement. For example, it is recommended to diversify food and avoid rice in infants. In addition, it is better to learn about objects likely to contain lead. These simple but crucial actions make it possible to limit exposure to a toxin which continues, discreetly, to harm health.
