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Effects of Microplastics on Mental Health
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This review examines the emerging evidence linking microplastic exposure to mental health outcomes, discussing proposed mechanisms including neuroinflammation, gut-brain axis disruption, and endocrine interference from plastic-associated chemicals. The authors call for dedicated human cohort studies to establish whether environmental microplastic levels contribute to psychiatric or cognitive conditions.
The impact of microplastics on mental health is an emerging area of research, and the medical literature points to potential neurobehavioral effects. Studies have shown that exposure to microplastics can lead to changes in behavior, neurotoxicity, and cognitive impairments in animal models. Although these findings from animal studies suggest a possible link between microplastic exposure and mental health outcomes, it is important to note that research in this area is still limited and more studies are needed to understand the mechanisms and consequences for human health.
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Micro- and nanoplastics and potential perturbation of the microbiota-gut-brain axis.
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This review summarizes existing research on microplastics and nanoplastics and their possible effects on the gut, its microbes, and the brain. Animal studies found changes in gut bacteria, gut barrier function, inflammation, and behavior, but human evidence remains limited and cannot yet show these particles cause brain disease.
Ingested microplastics and the gut–brain axis: A systematic review of mechanistic pathways and neurobiological impacts in human and preclinical models
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This review summarizes existing research on tiny plastic particles and the gut-brain connection in rodent and human cell studies. Swallowed or inhaled plastics built up in the digestive tract, altered gut bacteria, and were linked to inflammation and behavior changes in animals. In rodent studies, treatments like fecal transplants and certain probiotics were linked to reduced brain-related harm from plastic exposure.
Microplastics and mental health: The role of ultra-processed foods
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This paper proposes that microplastics in ultra-processed foods may partly explain why these foods are linked to worse mental health outcomes. With over 50% of calories in the U.S. coming from ultra-processed sources, and recent findings showing alarming microplastic levels in human brains, the authors suggest that food processing and packaging introduce microplastics that could affect brain function.
Health risk analysis of micro-and nanoplastic exposure via the microbiota-gut-brain axis
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This review examines how micro- and nanoplastics that accumulate in the gastrointestinal tract may disrupt the microbiota-gut-brain axis through neural, immune, and endocrine pathways. The study suggests that these particles can interfere with normal gut microbiota function after entering the body through diet, inhalation, and skin contact, potentially inducing or worsening health effects.
Microplastic Neurotoxicity in the Prefrontal Cortex: A Review of Mechanisms and Neuropsychiatric Associations
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Researchers synthesize current evidence on how microplastics accumulate in the brain and impair prefrontal cortex function through structural neural network damage, neurotransmitter disruption, and neuroinflammation, proposing mechanistic links to cognitive deficits, emotional dysregulation, and neuropsychiatric conditions.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.