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Microplastic “Seasoning”: A Study on Microplastic Contamination of Sea Salts in Bangladesh and the Risks Associated with its Consumption
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Microplastic contamination in commercially available table salts of Pakistan
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Researchers tested table salt sold in Pakistan, from sea, rock, and lake sources, and found tiny plastic bits (microplastics) in all of them, averaging 30-35 pieces per kilogram, mostly black plastic fibers. The good news: because Pakistanis tend to eat less salt overall compared to countries like Bangladesh, their actual microplastic exposure from salt is lower, but the findings still confirm that plastic contamination has worked its way into a kitchen staple nearly everyone uses daily.
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Analysis of commercial crystal and iodized salts from India and Sri Lanka found 7.9–17.2 microplastic particles per kilogram, predominantly polypropylene and polyethylene fibers under 1 mm, with Indian salt classified at a higher chemical hazard level; daily consumption at WHO-recommended amounts would expose individuals to 14–31 microplastic particles per year. Salt represents a direct, daily dietary exposure route for microplastics, underscoring the need to protect salt production water sources and improve manufacturing processes.
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Researchers analyzed microplastic contamination in raw and commercial salt samples from Palk Bay, India, identifying 205 MP particles per kilogram predominantly as fibers and polymers including polyethylene and PET, with raw salts showing higher contamination than processed commercial salts.
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Researchers quantified microplastics and mesoplastics across surface water, beach sediments, and crude sea salt from the Cox's Bazar coast of Bangladesh, finding up to 630 microplastic items/kg in crude salt and widespread contamination across all environmental matrices. The presence of substantial microplastics in crude sea salt is particularly significant because salt is a dietary staple consumed globally, providing a direct route for plastic particle ingestion by human populations.
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