Eco-friendly bamboo dishes, often marketed as natural and safe alternatives to plastic, may actually release harmful chemicals into food, according to a recent study. The research, led by scientists at the University of Chemistry and Technology, Prague, found that a significant portion of tested tableware contained the industrial chemical melamine, which migrated into food simulants at levels exceeding legal limits. This discovery raises concerns about the safety of these so-called 'eco-friendly' products.
The study analyzed 33 bio-based dishes, including bowls, cups, and dining sets, purchased from markets in the Czech Republic, the United Kingdom, and China. Using advanced analytical techniques, the researchers found that melamine was present in 32% of the tested products, almost exclusively in those containing bamboo. The migration tests revealed that six of the bamboo-based products were non-compliant with European Union regulations, releasing melamine above the specific migration limit.
The study also documented that melamine leached into common beverages, including hot lemon tea and orange juice, highlighting a direct route of consumer exposure. This finding is particularly concerning given that the 'natural' label can be dangerously misleading. Many of these products are essentially plastic dishes made from melamine-formaldehyde resin containing bamboo filler, which can accelerate the polymer's degradation and increase the migration of harmful substances like melamine, especially into hot or acidic foods and drinks.
Despite the EU's ban on the use of bamboo as an additive in plastic food contact materials since 2021, these items are still available for purchase. The research highlights the false advertising common with these products, which are often labeled as '100% bamboo' or 'biodegradable' despite being composed of a plastic resin. The study also identified other contaminants, such as residues of pesticides in several bio-based dishes, particularly those made from cereals, and disinfectants in bamboo-based items.
The researchers conclude that significant safety concerns persist for bio-based tableware and call for increased vigilance and market surveillance to protect consumers from hazardous and illegally marketed products. This study serves as a critical warning for consumers who choose bio-based tableware believing it is a safer, more sustainable option.
