The review article mentions that the chemicals associated with plastics have been studied before, but not plastic particles. Toxicological study of the effects of plastics has also not been particularly aimed at younger age groups, even though their immunological defence mechanisms are not developed yet and the growth and developmental phases make them very vulnerable.

The plastic breaks down into microplastics, which are usually less than 5 mm in size, and into nanoplastics that are less than 0.001 mm in size. Micro- and nanoplastics are so small that they can travel into lungs and the placenta, carrying also chemicals that are harmful to health. The review article examined the absorption of plastics through respiration, placenta, digestive tract, breastfeeding and skin. Especially the use of infant formula, feeding bottles and plastic packaging were examined, as well as how plastics can be absorbed from them by foetuses during pregnancy, or by a newborn or a child. Also the regulations and restriction in terms of the use of plastics in these age groups were examined. 37 research publications were found regarding this subject, which is very little. 

There is no information on how microplastics are absorbed by children – caution and recommendations are necessary

Right now there is no research data on how much children absorb microplastics and there is not much research on the subject. However, some studies estimate that children already absorb microplastics in the foetal period, which researchers find alarming. There are also no studies on how micro- and nanoplastics are absorbed at school, or for example when children are playing on the floor, during which microplastics are absorbed from dust, or from diaper materials. The difficulty of studying particularly small particles with modern technology is one of the reasons for the lack of research on this subject.

Researchers are very concerned about the microplastics found in placentas. “In the near future, we need to urgently study the effects that the exposure to nano- and microplastics has on the development of foetuses and children, as well as the journey of plastics from feeding bottles and packaging inside the body, and the their effects on children”, says a member of the research team, Professor Arja Rautio from the University of Oulu. “It is also important to increase parents’ and authorities’ awareness of plastics, as well as reducing the use of plastics, since we don’t know their long-term effects on children yet.”

The exposure to environmental chemicals, such as plastics, during pregnancy, as a newborn and as a child is an important research subject for the multidisciplinary, international research team, and a subject that requires social communication, attention and global actions. According the researchers, the use of chemicals that are harmful to development should be restricted or banned so that exposure can be avoided. 

Conclusions and guidelines for decision-makers, companies and families

Parents

  • Make sure that children’s food has as little contact with plastic as possible.
  • Wet clean regularly, as dust may carry microplastics.
  • Choose personal hygiene products that contain less plastic. 
  • Are you renovating? Choose building materials that do not contain PVC or other plastics.

Decision-makers, authorities and industry

  • The UN’s list of children’s rights includes the right to the highest possible level of health, and one of the principles of sustainable development is the goal to reduce the amount of chemicals that are harmful to health in the environment.
  • Because there is so little information on the risks that nano- and microplastics pose to children, we need to comply with the principles of caution and support the monitoring and research on the subject.
  • Both the national and local operators have the power to reduce the exposure to plastics.
  • The regulations about different plastics such as toys and feeding bottles or plastic waste management vary locally and internationally. 
  • Industry and companies that manufacture plastic products aimed at children and women should responsibly study how much the products produce nano- and microplastics and make sure that the emission is minimal.

The review article was published in the high ranking Environmental Health Perspectives journal on January 26th, 2022.

The research article: Sripada, K., Wierzbicka, A. Abass, K., Grimalt, J., Erbe, A., Röllin, H. Weihe, P., Jiménez Díaz, G., Singh, R., Visnes, T., Rautio, A., Odland, J. Ø., Wagner, M. (2022). A children’s health perspective on nano- and microplastics. Environmental Health Perspectives. Link to the article https://doi.org/10.1289/EHP9086

Original news story: University of Oulu