Can BPA (plastics) exposure be an environmental factor in autism? 

Yes, there is growing evidence suggesting that BPA exposure & autism may be linked. BPA (bisphenol A) is a chemical commonly found in plastics and resins, used in products such as food containers, water bottles, and thermal paper. Research indicates that autism exposure to BPA, particularly during pregnancy or early childhood, may contribute to neurodevelopmental differences. 

BPA is known to disrupt endocrine function, as it can mimic oestrogen and interfere with hormone systems. These hormonal disruptions during critical periods of brain development may influence how neurons grow and connect, potentially contributing to traits associated with autism, such as social difficulties and sensory sensitivities. 

How BPA Exposure Might Influence Autism 

Here are two ways BPA exposure might contribute to autism: 

Disruption of hormonal systems 

BPA acts as an endocrine disruptor, which can interfere with the normal functioning of hormones involved in brain development. This can alter the formation of brain circuits that control social behaviours and communication. 

Effects on neurodevelopment and synaptic plasticity 

Exposure to BPA may impact brain cells’ ability to form connections and communicate. This disruption during key developmental windows could contribute to the neurodevelopmental differences observed in autism. 

The potential link between BPA exposure & autism underscores the importance of reducing exposure to plastics, particularly for pregnant individuals and young children. Visit providers like Autism Detect for personal consultations and further guidance on screening and support. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Environmental Factors. 

Lucia Alvarez, MSc

Author

Lucia Alvarez is a clinical psychologist with a Master’s in Clinical Psychology and extensive experience providing evidence-based therapy and psychological assessment to children, adolescents, and adults. Skilled in CBT, DBT, and other therapeutic interventions, she has worked in hospital, community, and residential care settings. Her expertise includes grief counseling, anxiety management, and resilience-building, with a strong focus on creating safe, supportive environments to improve mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy. 

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.