-

 

Epilepsy and PFAS: Understanding Exposures and Outcomes for Developing Children and Young Adults

Abstract

Per- and polyfluoroalkyl substances (PFAS) represent one of the most persistent and pervasive groups of anthropogenic chemicals in the modern world. Their resistance to degradation, coupled with widespread industrial use, has resulted in their accumulation in soil, water, and biological systems across the globe. Recent evidence indicates that PFAS exposure may have profound implications for neurodevelopment, contributing to the onset and progression of neurological disorders such as epilepsy.
This paper explores the intricate relationship between PFAS exposure and epilepsy in children and young adults, highlighting the neurobiological pathways, exposure dynamics, and emerging health risks in African contexts. It also outlines policy and governance interventions that can mitigate PFAS-related neurological risks and safeguard youth development across the continent.

1. Introduction

Epilepsy, a chronic neurological disorder characterized by recurrent seizures, affects approximately 50 million people worldwide, with over 80% of cases occurring in low- and middle-income countries (LMICs). In sub-Saharan Africa, epilepsy prevalence is estimated at between 7 and 14 per 1,000 population, significantly higher than in high-income regions.

Historically, epilepsy has been associated with infectious, genetic, or traumatic causes. However, mounting scientific evidence now implicates environmental neurotoxicants—including PFAS—as contributing factors. PFAS exposure begins before birth and continues throughout childhood and adolescence, periods marked by intense brain growth and synaptic formation.

In Africa, environmental exposure to PFAS is exacerbated by industrial waste mismanagement, e-waste burning, unregulated imports, and contaminated water systems. Children in such environments are uniquely vulnerable, and PFAS neurotoxicity may exacerbate the already high burden of neurological and developmental disorders, including epilepsy.

2. PFAS Exposure Pathways in African Contexts

PFAS contamination has increasingly become a silent but pervasive threat in Africa, largely due to industrial globalization and weak environmental regulation. Exposure occurs through multiple interconnected pathways:

a. Contaminated Water and Food

In Kenya, Ghana, and South Africa, PFAS compounds such as PFOS and PFOA have been detected in groundwater, fish, and agricultural produce near industrial zones and waste sites. These chemicals are not removed by conventional water treatment, posing chronic exposure risks through drinking water and diet.

b. Informal E-Waste Recycling

E-waste dismantling hubs, notably in Agbogbloshie (Ghana), Dandora (Kenya), and Johannesburg (South Africa), involve open burning of electronic materials coated with PFAS-based flame retardants and surfactants. This releases toxic aerosols and dust particles that settle into soil and waterways, directly exposing children who live, play, or scavenge in these environments.

c. Maternal Transfer and Early-Life Exposure

PFAS compounds cross the placental barrier and are secreted in breast milk, resulting in fetal and neonatal exposure. Infants thus begin life with a toxic body burden, potentially altering neural development before the onset of postnatal environmental exposures.

d. Household and Consumer Products

Commonly used items such as food packaging, textiles, cosmetics, and cleaning agents contribute to domestic exposure. PFAS-coated school uniforms and waterproof materials add an often-overlooked dimension to chronic, low-level ingestion and dermal absorption among children.

3. Biological Mechanisms Linking PFAS Exposure to Epilepsy

The neurological effects of PFAS stem from their ability to disrupt cellular signaling, oxidative balance, and hormonal pathways crucial for normal brain function.

a. Neuroinflammation and Oxidative Stress

PFAS trigger microglial activation and the release of inflammatory mediators such as IL-6 and TNF-α. This neuroinflammation promotes neuronal hyperexcitability—a hallmark of epileptic pathology. Chronic oxidative stress further damages mitochondrial function, impairing energy metabolism in neurons.

b. Endocrine and Thyroid Disruption

PFAS molecules interfere with thyroid hormone homeostasis, particularly thyroxine (T4), which regulates brain maturation and myelination. In children, thyroid hormone dysregulation can result in delayed neurocognitive development and a lowered seizure threshold.

c. Neurotransmitter Imbalance

Experimental data demonstrate that PFAS exposure alters GABAergic and glutamatergic transmission—two systems fundamental to controlling electrical activity in the brain. The inhibition of GABA or enhancement of glutamate release may induce uncontrolled neuronal firing, contributing to epileptogenesis.

d. Epigenetic and Genetic Pathway Alterations

PFAS are associated with changes in DNA methylation and histone modification of genes regulating neuronal excitability. These epigenetic alterations may persist across generations, suggesting that today’s exposures could have lasting effects on future populations.

4. Epidemiological and Experimental Evidence

Although direct causative links between PFAS and epilepsy are still under investigation, a growing body of toxicological and epidemiological evidence supports their role in neurological dysfunction:

  • Animal studies indicate that early-life PFOS exposure leads to seizure-like discharges, hyperactivity, and cognitive deficits in rodents.

  • Human biomonitoring studies show correlations between high PFAS serum levels and attention deficit, reduced IQ, and impaired working memory, all of which are associated with neurological instability.

  • Prenatal exposure studies in Scandinavia, China, and the United States have identified abnormal EEG patterns in infants exposed to PFAS in utero.

  • African studies, though limited, show concerning PFAS levels in the serum of children living near waste recycling zones and industrial hotspots, underscoring an urgent need for regional neurotoxicological research.

5. Developmental and Socioeconomic Implications

The developmental trajectory of a child exposed to PFAS-related neurotoxicity is complex and often lifelong:

  • Learning and Behavioral Impairments: Epileptic children may face learning difficulties, attention deficits, and reduced school performance, worsening educational inequality.

  • Psychosocial Burden: Stigma and discrimination against children with epilepsy in many African societies compound emotional and social stress.

  • Economic Costs: Chronic epilepsy management increases household healthcare expenditures, diverting resources from nutrition and education.

  • Intergenerational Effects: Epigenetic changes suggest possible transmission of susceptibility to neurological disorders, perpetuating a cycle of environmental and developmental disadvantage.

6. Policy and Governance Recommendations

a. Strengthen Environmental Regulation

African governments must integrate PFAS within existing frameworks for persistent organic pollutants (POPs) under the Stockholm Convention, enforcing stricter limits on industrial discharge and consumer imports containing PFAS.

b. Establish National PFAS Monitoring and Research Systems

Countries should create national PFAS surveillance laboratories to track contamination levels in water, soil, and human tissue. Data-driven assessments will inform evidence-based neurological health policies.

c. Integrate Environmental Neurotoxicity into Public Health Programs

Epilepsy prevention strategies should include environmental risk screening, particularly for pregnant women and children in high-exposure communities.

d. Promote Public Awareness and Safer Alternatives

Education campaigns targeting schools, parents, and local industries can reduce domestic PFAS use. Governments should incentivize adoption of non-fluorinated alternatives in manufacturing and packaging.

e. Foster International Collaboration and Funding

African countries should collaborate through regional mechanisms such as the African Union’s Health Strategy and UNEP’s Global Chemicals Outlook, ensuring funding for remediation, capacity building, and community protection initiatives.

7. Conclusion

Epilepsy and PFAS exposure together represent a public health intersection of chemical pollution and neurological vulnerability. For African children and young adults, this convergence threatens not only health but also educational achievement, economic productivity, and long-term development.

A multisectoral response—combining environmental regulation, child health surveillance, and public awareness—is essential to address this hidden epidemic. Investing in PFAS-free environments and early neurological intervention will not only reduce epilepsy prevalence but also secure a healthier, more resilient generation across Africa.

References

  1. Grandjean, P., & Clapp, R. (2015). Perfluorinated Alkyl Substances: Emerging Insights Into Health Risks. New Solutions, 25(2).

  2. Sunderland, E. M., et al. (2019). A review of the pathways of human exposure to poly- and perfluoroalkyl substances. Environmental Health Perspectives, 127(1).

  3. Liu, Z., et al. (2021). PFAS and the developing brain: A review of neurotoxicity and implications. Neurotoxicology, 87.

  4. Björnsdotter, M. K., et al. (2023). Prenatal exposure to PFAS and neurodevelopmental outcomes in children. Environmental Research, 225.

  5. Adegoke, A. A., et al. (2024). Environmental contamination by PFAS and implications for child health in sub-Saharan Africa. African Journal of Environmental Health, 12(3).

  6. UNEP (2023). Global Chemicals Outlook III: Towards a PFAS-Free Future.

Comments

Post a Comment

Popular posts from this blog

-
  Impacts of Pit Latrine Waste on Early Puberty in Africa Introduction Across sub-Saharan Africa, pit latrines serve as the primary sanitation infrastructure for over 50% of urban populations and an even higher proportion in rural areas, providing a low-cost solution to the challenge of open defecation. These simple, often unlined pits collect human waste but pose significant risks to environmental and public health due to potential groundwater contamination. Emerging evidence suggests that chemical pollutants from pit latrines, particularly endocrine-disrupting chemicals (EDCs), may contribute to early puberty in children, especially girls, with far-reaching health, social, and educational consequences. Early puberty, defined as pubertal development before age 8 in girls or 9 in boys, is associated with increased risks of mental health disorders, reproductive health issues, and socioeconomic challenges, particularly in resource-constrained settings. In Africa, where sanitation inf...
Read more
-
  Health insurance affordability and the quality of life among low Socioeconomic Status (SES) individuals in Low- and Middle-Income Countries (LMICs)   Preamble: Whereas the right to health is a fundamental human right, it remains inaccessible to many, especially those of low socioeconomic status (SES) in low- and middle-income countries (LMICs); and whereas the affordability of health insurance is a critical factor that can enhance or impede access to necessary healthcare services; we recognize that the ability to obtain health insurance plays a pivotal role in determining the quality of life for individuals and families within these communities. Acknowledging that the lack of affordable health insurance options leads to a disproportionate burden of disease and financial hardship on low SES populations; and understanding that the provision of affordable health insurance is not only a matter of social justice but also an investment in the social and economic development ...
Read more
-
Child Health:  Dealing with Aflatoxins in Children’s Food Aflatoxins, produced primarily by Aspergillus flavus and A. parasiticus , are highly toxic and carcinogenic mycotoxins that contaminate key food crops in tropical and subtropical regions. In low- and middle-income countries (LMICs), especially across sub-Saharan Africa, chronic exposure to aflatoxins in staple foods poses grave health risks for children, including growth impairment, immunosuppression, developmental deficits, and increased vulnerability to infectious diseases. This paper explores the sources of aflatoxin contamination in children's food, its public health impacts, and proposes multisectoral policies and interventions to protect child health and nutrition, with a focus on evidence from Africa. 1. Introduction Aflatoxin contamination is one of the most pressing yet under-addressed food safety challenges affecting children in LMICs. Staple foods such as maize, sorghum, groundnuts, and dairy products are pro...
Read more