After tea luggage and chewing gum, it seems the subsequent worrying supply of microplastics is one thing much more omnipresent: salt. And it will get worse — in response to analysis, the fancier, premium salts like Himalayan salt and artisanal sea salt aren’t as pure as their messaging appears to recommend. In actuality, these salts have been proven to be much more contaminated than standard refined salts.
“The reality is that microplastics are current in over 90% of business salt manufacturers globally, with larger concentrations often present in terrestrial salts (like Himalayan pink salt) than marine salts,” explains Arif Gasilov, companion at Gasilov Group, a sustainability and ESG consultancy. “I feel that creates some necessary questions concerning if there even is such a factor as a ‘protected’ salt.”
Specialty Salts Are the Most Contaminated on the Market
The microplastics load of desk salts has been examined by a spread of latest research aiming to raised perceive our publicity. Whereas outcomes fluctuate relying on the samples, one factor has proved to be true throughout the board: Artisan salts are often the worst culprits on the subject of contamination.
A 2022 research in Environmental Science and Air pollution Analysis discovered that of seven examined samples, coarse Himalayan pink salt had the best microplastics load1.
Sea Salt Displays Excessive Microplastics Masses
By and huge, unrefined sea salt has confirmed notably problematic on the subject of microplastics contamination. A 2018 research of 39 manufacturers from 21 international locations printed in Environmental Science & Expertise discovered an “abundance” of microplastics in unrefined sea salts, notably these sourced from Asia2. Sea salt generally was discovered to have as much as 1,674 microplastic particles per kilogram, as in comparison with lake salt, whose 462 per kilogram most pales compared.
As regarding as these outcomes are, they actually make sense. Since microplastics are actually ubiquitous in our oceans3, it ought to come as no shock that plastic particles are turning up within the salt harvested from them, particularly unrefined manufacturers.
“Unrefined sea salt comes immediately from ocean water, which is loaded with microplastics now,” explains Dr. Paul Savage. “The ocean is a sink for plastic air pollution.”
Seeing as Asia is a “hotspot for plastic air pollution,” in response to the OECD4, it’s solely logical that salt from these areas must be extra closely contaminated. However Mediterranean sea salts, together with Italian, additionally confirmed notably excessive ranges, with one 2022 research discovering 1,653 particles/kg in contamination the authors attributed “solely because of the presence of microplastics in seawater5.”
Himalayan Salt Is Contaminated Throughout Manufacturing
The presence of microplastics in Himalayan salt is much extra shocking, seeing as this salt is mined, not harvested from the ocean. For Dr. Jennifer Brandon, Environmental Scientist and Sustainability Advisor at Wild Beacon Consulting, that is possible due to not environmental contamination, however slightly, how the salt is excavated and handled.
“Though rock salt has low atmospheric publicity charges within the caves, it appears to have a excessive publicity and contamination charge throughout mining and processing,” she says. Alex LeBeau, PhD, MPH, CIH, Toxicologist, Licensed Industrial Hygienist, and proprietor of Publicity Consulting, agrees. She cites the remedy, crushing, and packaging course of as “a serious international contributing issue” to contamination.
“Based mostly on the method, there might be a number of factors alongside the manufacturing line the place microplastics could also be launched, together with the gross sales packaging itself by which the salt is offered.”
How one can Scale back Plastic Publicity
Whereas it’s by no means enjoyable to discover a new supply of microplastics, take coronary heart: Salt might be not going to be the most important supply of plastic in your eating regimen. The typical human salt consumption is about two to 3 grams of salt per day, making salt a comparatively small contributor to general microplastic publicity. Greater sources embrace ingesting water, seafood, meals packaging and plastic utensils, and even the air we breathe.
For the reason that long-term well being results of microplastic ingestion are nonetheless being studied, there’s quite a bit we don’t know. The research are far and wide — some present that microplastics are linked to an elevated danger of heart problems, whereas different scientists recommend that earlier analysis about microplastic accumulation in our our bodies might have been overinflated. Others nonetheless have discovered {that a} bacterium in kimchi might be the reply to decreasing microplastic absorption in our our bodies. Because the analysis continues, all we are able to do is keep knowledgeable and do our greatest to take precautions by minimizing publicity the place doable.
Select Cleaner Salts
Salt is a small piece of the publicity puzzle, however you’ll be able to nonetheless be intentional if you wish to decrease microplastic ingestion. To be protected, select lake salt when doable. Analysis has proven that salts sourced from lakes and wells confirmed the bottom concentrations of microplastic particles — about 36 per kilogram, on common.
You can even take note of sourcing, avoiding sea salt from high-pollution areas just like the Mediterranean or Asian Pacific. To go the additional mile, search for salts packaged in cardboard slightly than plastic containers.
Gasilov recommends selecting salts made utilizing managed evaporation strategies, like solar-evaporated salts, in addition to manufacturers that publish third-party lab take a look at outcomes showcasing their lack of contamination. These are good guidelines of thumb for many merchandise you devour. “On the finish of the day, shoppers can scale back publicity by being conscious and pushing for stronger accountability,” he says.
Take into account Extra Refined Salts
Whereas unrefined salts have been marketed because the cleaner different for many years, this may now not be the case, in response to Savage. “The advertising and marketing narrative round these merchandise (‘pure, pure, unrefined’) doesn’t account for the truth that ‘pure’ now contains microplastics,” he says.
“The irony is that much less processing generally means much less filtration,” he provides. “Refined white desk salt goes by means of extra aggressive purification steps, which may really take away some microplastics within the course of. So the premium product that sounds cleaner may very well carry extra contamination as a result of it’s been touched much less by industrial processing.”
“I purchase cheaper, iodized desk salt, in a cardboard cylinder,” says Brandon. “It has much less environmental publicity and the container itself will not be one other level supply of plastic. Search for containers which can be glass or cardboard, and don’t be afraid to spend much less cash for one thing that will even be much less microplastic.”
In the end, salt is only a tiny fraction of your potential microplastic publicity. Fairly than specializing in this information, take into account your general plastic footprint.
“Right here’s the truth: you’re consuming a bank card’s value of plastic each month already, principally from meals and water,” says Savage. “Salt is a supply, however it’s not the highest one.”
“What I inform individuals is that this: don’t obsess over salt as your main microplastic supply. Deal with greater exposures first. Use a high quality water filter at house. Select seafood correctly (smaller fish like sardines and anchovies accumulate lower than bigger predatory fish). Keep away from heating meals in plastic. Scale back bottled water use. These strikes will scale back your microplastic burden way over switching salt manufacturers.”
Whereas particular person decisions assist, that is finally a systemic air pollution drawback. Do your finest to assist insurance policies that scale back plastic manufacturing and ocean air pollution and decrease your publicity the place doable with out letting the stress overtake your life.
Sources:
- https://pmc.ncbi.nlm.nih.gov/articles/PMC9813175/
- https://pubs.acs.org/doi/10.1021/acs.est.8b04180
- https://www.nature.com/articles/s41586-025-08818-1
- https://www.oecd.org/en/publications/regional-plastics-outlook-for-southeast-and-east-asia_5a8ff43c-en/full-report/a-regional-plastics-outlook-rationale-and-key-findings_22050aff.html
- https://pubmed.ncbi.nlm.nih.gov/36279784/
