Better Brain Fitness (a Brainjo Production) Are Microplastics Causing Dementia?
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Nov 4, 2025 Recent studies show alarming levels of microplastics in the brain, especially among dementia patients. The hosts explore how these plastics enter the body and their potential harmful effects. They discuss methods for reducing exposure, such as avoiding plastic food containers and using water filters. The podcast also highlights dietary strategies to help clear microplastics from the system, emphasizing whole foods over processed options. With practical lifestyle changes, listeners are encouraged to take precautionary steps for better brain health.
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Microplastics Found In Human Brains
- A 2024 study found about a teaspoon of micro- and nanoplastics in typical brains, higher than liver or kidney levels.
- Brains of people with dementia had roughly five times more plastic, but causation is unresolved.
Three Mechanisms For Harm
- Microplastics may harm via foreign-body immune responses, concentrating other toxins, or leaching chemical additives like BPA.
- These three mechanisms explain most theoretical biological effects.
Human Evidence Is Limited
- Most evidence of harm comes from animal and cell studies showing oxidative stress, inflammation, and cognitive effects.
- Human data are sparse, so extrapolation remains uncertain.
