There's Sugar in Your Salt

What you'll learn

Why sodium is essential — and why "essential" doesn't mean "unlimited"

What actually happens to salt between the sea and your shaker

Why there may be sugar, and an anti-caking agent, in iodized table salt

How salts from four regions differ, and which differences are real

What the evidence does and doesn't say about mineral salt and bone health

The one salt swap tested in a large cardiovascular-outcome trial

Where the sodium in your diet is actually coming from — and the jobs it's doing there

Read the ingredient panel on a common canister of iodized table salt.

Salt. Calcium silicate. Dextrose. Potassium iodide.

Dextrose is sugar. It's there for a reason — and the reason is more interesting than the fact. The most basic ingredient in your kitchen, the one nobody thinks of as a manufactured product, arrives with a four-item ingredient list that includes sugar. That's not a scandal; it's a common consequence of refining salt for purity, fortifying it with iodine, and engineering it to stay free-flowing. This article is about what that refining removes, what gets added back, and why none of it is where your sodium problem actually lives.

How SmartBar applies the deficiency framework

SmartBar assesses products using three things we can verify: ingredient composition, level of processing, and nutritional data. Deficiency means something the body needs and isn't getting. Toxicity means a burden the body must process and clear — not a poison.

Sodium is one of the most actively debated topics in nutrition science, and we'll flag the places where evidence is thin. We cite our sources so you can check our work.

This article is not a recommendation to eat more salt, and it does not endorse any brand. If you have high blood pressure, heart failure, kidney disease, a pregnancy-related complication affecting blood pressure or fluid balance, or another condition requiring sodium management, follow guidance from your clinician.

First: sodium is essential — but essential isn't unlimited

Before any argument about which salt, settle whether.

Sodium is the body's principal extracellular electrolyte. It supports nerve signaling, muscle contraction, fluid balance, acid-base regulation, and nutrient absorption in the gut.[1] Blood sodium is defended within a narrow range, and abnormal levels usually reflect disturbed water balance rather than the effect of one salty meal.[2]

You cannot live without sodium chloride. But essential does not mean unlimited, and deficiency from ordinary eating is uncommon. The practical questions are how much sodium you consume, and where it comes from.

What happens to salt on the way to your shaker

Conventional table salt usually begins as brine — water pumped underground to dissolve a salt deposit — which is processed through mechanical or vacuum evaporation, washed, and dried. Most of the naturally accompanying minerals and other material are removed. The output is over 99% pure sodium chloride.[3]

It is not ultra-processed under NOVA; it's a processed culinary ingredient, the same category as oil, butter, and sugar.[4] It is, however, refined to very high sodium-chloride purity. To keep that refined, often-fortified product uniform and free-flowing, manufacturers commonly add other ingredients — for two separate reasons.

The first is caking. Sodium chloride crystals absorb humidity and fuse into a solid block. (This isn't caused by removing minerals — some unrefined salts, high in magnesium, stay permanently damp.) The fix: an anti-caking agent, such as calcium silicate, sodium aluminosilicate, silicon dioxide, or sodium ferrocyanide, which manages surface moisture or alters crystal growth.[3]

The second is fortification. Iodized salt carries added potassium iodide, and under unfavorable storage that iodide can convert into forms that reduce the available iodine. The fix: dextrose — a trace of sugar acting as a stabilizer to protect the iodide (sometimes sodium bicarbonate too).[3]

The result is not evidence of a conspiracy: salt is refined for uniformity, fortified for public health, and given small amounts of stabilizing or anti-caking ingredients so it remains usable and chemically stable.

What iodized table salt gets right

Fairness requires this, and the wellness conversation almost always skips it.

Salt iodization is among the most successful public health interventions in history. Iodine deficiency causes goiter and, in pregnancy, preventable cognitive impairment in the child. Adding potassium iodide to table salt largely ended endemic iodine deficiency wherever it was adopted. Most specialty and unrefined salts are not reliable sources of iodine unless specifically iodized — so if you've switched entirely to unrefined salt and don't regularly eat seafood, dairy, eggs, or appropriately selected seaweed, you may have quietly removed your main iodine source. Worth knowing, especially before and during pregnancy, when iodine requirements rise. Both too little and too much iodine can be harmful, so the answer isn't indiscriminate supplementation or large amounts of seaweed (whose iodine content varies enormously) — it's a reliable, appropriate source, discussed with a clinician where pregnancy or thyroid disease is involved.[15]

That iodine tradeoff belongs in any honest comparison.

Four regions, four methods

Salt is a geographic product — what's in it and what was done to it depend on where it came from. Here's what's verifiable about four of the salts you'll actually see on a shelf — pink Himalayan, Celtic grey, Baja, and Icelandic flake — described by region rather than brand, because SmartBar doesn't endorse products.

	Pink Himalayan (Punjab rock salt)	Celtic grey (Brittany sel gris)	Baja California (see note below)	Icelandic flake
Source	Mined from an ancient seabed deposit	Atlantic seawater in clay marshes	Pacific lagoon brine, or Gulf of California — depends on the product	Arctic seawater
Production method	Mined, crushed, graded; minimal processing	Hand-raked with wooden tools; sun and wind only	Solar evaporation in coastal ponds	Evaporated with geothermal heat; hand-harvested flakes
Additives	Typically none — verify the label	Typically none — verify the label	Typically none — verify the label	Typically none — verify the label
Color from	Iron oxide	Clay (high magnesium; stays damp)	Varies by product	—

The meaningful differences here are production method, texture, moisture, and additives — not major nutritional differences. Celtic grey salt remains damp partly because of magnesium chloride; Icelandic flake uses geothermal process heat rather than fossil fuel. Refined table salt is the one most commonly sold as a multi-ingredient formulation. None of these facts makes one salt a major source of minerals.[5][6][7][22]

One honest caveat about that third column, because a tidy table can imply a certainty we don't have. "Baja sea salt" covers two different things. The large, thoroughly documented operation sits on the Pacific side of the peninsula, at Laguna Ojo de Liebre near Guerrero Negro, where seawater is concentrated across roughly 33,000 hectares of solar ponds over many months — visible from orbit and described by public agencies.[23] Salt marketed as coming from the Sea of Cortez, on the Gulf side, is a separate product, and here is what we found: we could not locate independent documentation of how it is harvested or processed. The available descriptions come from the producers. That doesn't make them false — it makes them unverified, and we'd rather tell you which is which than let the two share a column and borrow each other's credibility.

The two in your kitchen right now

Neither "sea salt" nor "kosher salt" is a region, and both are widely misunderstood.

"Sea salt" is not a guarantee of mineral content or minimal processing. Federal rules don't prescribe one production method or mineral profile for the term, so one sea salt may be hand-harvested while another is washed and refined to resemble table salt, with the same anti-caking agents.[8] It's the front-of-package claim of the salt aisle — a word that sounds like a process, sold as a property.

"Kosher salt" describes a coarse crystal traditionally useful for koshering meat, not an unrefined salt. It's generally highly purified and uniodized. Its legitimate advantage is culinary: the crystals are easy to handle. And because brands differ in crystal density, equal teaspoons may contain different weights — and therefore different amounts of sodium, the same volume-versus-weight problem that runs through this whole subject.

So are the minerals actually doing anything?

Here's where SmartBar parts company with a lot of what's written about salt. The trace minerals in unrefined salt are real. At the amounts anyone eats, they are nutritionally minor.

Per gram, unrefined salt provides on the order of a few milligrams of potassium and about a milligram of magnesium. A single banana has roughly 422 mg of potassium; a handful of pumpkin seeds delivers more magnesium than you'd get from a quantity of salt that would land you in a hospital. A 2020 laboratory analysis confirmed it rigorously: researchers ran elemental analysis on 31 pink salts sold in Australia against a white table-salt control. The pink salts did contain more minerals — but a person would need to eat more than 30 grams a day, roughly six teaspoons, for those minerals to make any meaningful contribution to nutrient intake.[5] Since the WHO recommends less than 5 grams of salt per day,[21] the sodium load would become excessive long before the trace minerals became useful. And one sample exceeded the national limit for lead — a reminder that "more minerals" is not the same as "more of only the minerals you want." Geography produces a chemical signature, not a health guarantee.

Sodium content, meanwhile, is broadly similar when salts are compared by weight — pink, grey, or white. Any claim that a specialty salt is "lower sodium" is almost always an artifact of volume: a coarser or wetter salt fits less into the same teaspoon. Gram for gram, it's a wash — a serving-size effect, the same mechanism that lets a manufacturer shrink a portion until an inconvenient number reads zero. We're not going to use a trick on you that we spent an entire article teaching you to catch.

Blue Zones, bone, and the dose problem

Claims that mineral salt supports longevity or bone health start with a partial truth: bone depends on more than calcium. Bone is not a calcium deposit — it's a living collagen-mineral structure, and magnesium, phosphorus, vitamin K, zinc, copper, and other nutrients participate in its formation and maintenance.[9][10][11] "Calcium alone isn't enough" is true, mainstream physiology.

The problem is dose. Salt supplies these minerals only in trace quantities; reaching a meaningful amount would require an unsafe sodium intake — and the sodium would harm long before the magnesium helped. Published accounts of "Blue Zone" longevity emphasize overall diets, movement, social connection, and other conditions — not controlled evidence that a particular salt caused longer life. The minerals your bones need come principally from food, in quantities culinary salt cannot provide.

So what is the case for unrefined salt?

The defensible case for unrefined salt is not nutritional superiority but processing: when the label confirms it, it may be a single-ingredient culinary salt without dextrose or anti-caking agents. That is a real distinction on exactly the axis SmartBar scores. It is also a modest one. "Unrefined" describes what wasn't removed or added; it doesn't guarantee that every naturally occurring trace element is desirable.

And now the part that matters most

None of the above is where your sodium is coming from.

More than 70% of the sodium Americans consume comes from packaged, processed, and restaurant food. In one detailed US study, about 5.6% was added during home cooking and 4.9% at the table — roughly 10.5% combined, with a further 14% inherent to the foods themselves.[12][13] The FDA says it plainly: "use of the salt shaker is not the main cause of too much sodium in your diet."[12]

[INFOGRAPHIC: sodium-sources bar chart — 70.9% added outside the home, 14.2% naturally inherent, 5.6% home cooking, 4.9% table. File: sodium-sources-infographic.svg]

Many top contributors don't taste as salty as their sodium content suggests. Bread and rolls — where salt controls fermentation and strengthens gluten — at 80–230 mg a slice. Deli meat, 750 mg or more per serving. Pizza, sandwiches, soups, cheese, savory snacks. Even plain raw chicken, often injected with sodium solution to add moisture and weight.[14]

Because in industrial food, sodium is rarely seasoning. It's doing other jobs:

Preservation — it lowers water activity, starving microbes of the free water they need.
Texture and weight — it binds water into processed meat, improving moisture retention and finished-product weight, and it emulsifies processed cheese.
Chemistry — it regulates yeast and strengthens dough on a production line.
Cost and distribution — preservation and water retention extend shelf life and improve manufacturing consistency.
Flavor modulation — the one worth stopping on.

Salt can suppress some — but not all — bitter-receptor responses, potentially softening off-notes from other ingredients.[16][17] It also appears in recurring hyper-palatable combinations such as fat with sodium and carbohydrate with sodium.[18] In many packaged foods, sodium is therefore part of the formulation, not merely surface seasoning.

The recurring pattern is familiar: once foods are fractionated or reformulated, sodium, sweeteners, starches, and flavorings often help rebuild texture, stability, and appeal.

The salt on your table announces itself: you taste it and you stop. The sodium in a sandwich barely announces itself at all — distributed through the bread, meat, cheese, and sauce, doing jobs well beyond surface seasoning. Which means you could switch to the most carefully harvested salt on earth and leave the great majority of your sodium intake unchanged. Buy the salt you like for flavor, texture, and processing preference — not for mineral or detox claims it can't deliver.

The one salt swap tested in a large clinical trial

Here's the twist the wellness aisle won't tell you, because it points at the opposite of an ancient mineral crystal. Reduced-sodium salt substitutes replace part of the sodium chloride with potassium chloride, hitting both sides of the ratio at once: less sodium in, more potassium in.

In the Salt Substitute and Stroke Study — an open-label trial of 20,995 older adults at elevated cardiovascular risk across 600 rural Chinese villages — a salt of 75% sodium chloride and 25% potassium chloride, used in place of regular salt, produced a 14% reduction in stroke, a 13% reduction in major cardiovascular events, and a 12% reduction in death over about five years, with no significant excess of serious hyperkalemia in the trial population — though people at known high risk were excluded.[19] Systematic reviews generally find modest blood-pressure reductions and probable cardiovascular benefit, though much of the strongest outcome evidence traces to that single trial, in a setting where most salt was added during home cooking rather than built into packaged food — so it may translate less directly to countries like the US.[20]

This is the one salt intervention in the article shown to change major clinical outcomes — not because it was ancient or minimally processed, but because its sodium-potassium composition was deliberately altered. It is not suitable for everyone: people with kidney disease, impaired potassium excretion, or medications that raise potassium require clinical guidance. Here, composition beat origin.

Key Takeaways

Sodium is essential — but the body defends blood sodium tightly, so shortage from ordinary eating is rare.

Table salt is a refined culinary ingredient often carrying an anti-caking agent plus, if iodized, potassium iodide and dextrose to stabilize the iodine.

Iodization is a real public-health achievement — switching entirely to unrefined salt can remove your main iodine source.

Trace minerals in unrefined salt are real but nutritionally minor at culinary amounts; the meaningful difference is processing, and the minerals your bones need come from food, not salt.

The one salt intervention tested in a large cardiovascular-outcome trial is engineered, not ancient: potassium-enriched salt substitutes reduced stroke and death — but aren't safe for people with kidney or potassium concerns.

Roughly 70–75% of dietary sodium comes from processed and restaurant food — not the shaker.

How to think about salt in thirty seconds

Read your salt's ingredient list. One ingredient means no additives — though it doesn't, by itself, tell you how heavily the salt was refined.
Choose unrefined for what it is, not what it claims. A minimally refined, single-ingredient culinary salt is the whole case. It's enough.
Keep an iodine source — seafood, seaweed, dairy, eggs, or keep iodized salt in the cupboard. Especially in pregnancy.
Move the conversation from your table to your cart. Compare sodium between similar products on the same basis — preferably per 100g or 100ml where available — then weigh how much you'll realistically eat. That's where the 70% is.
Favor naturally potassium-rich foods — vegetables, fruit, beans, potatoes, fish, and yogurt — while following clinical guidance if kidney function or potassium balance is a concern. Cooking more often gives you greater control over how much sodium goes into the meal.

What SmartBar does with this

SmartBar does not score salt by color, origin, or words such as "sea salt" and "mineral salt." Sodium is evaluated by measured quantity; processing and ingredients such as dextrose or anti-caking agents are assessed separately. The model also considers whether sodium appears in a simply seasoned food or within a more heavily engineered formulation — a label number alone can't supply that context, which is why processing and nutrient composition are evaluated together. A canister of table salt is a small, honest demonstration of the whole framework: a natural material, refined to near-purity, fortified and stabilized with additives, sold as though it were still just salt — with a sugar in the ingredient list of some brands that almost nobody has ever read.

Scan a product. Read the deductions. Decide for yourself.

This article is educational and is not medical advice. It does not endorse any brand or product. Sodium intake is genuinely clinical for people with hypertension, heart failure, kidney disease, pregnancy-related complications affecting blood pressure or fluid balance, or other conditions requiring sodium management — if that's you, work with a qualified clinician rather than adjusting your intake based on anything you read online, including here.

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References

Strazzullo, P. & Leclercq, C. (2014). "Sodium." Advances in Nutrition, 5(2):188–190. DOI: 10.3945/an.113.005215. PMCID: PMC3951800. (Sodium as the principal extracellular cation; roles in extracellular-fluid volume regulation, membrane excitability and nerve/muscle function, and intestinal absorption.)
Sterns, R.H. (2015). "Disorders of Plasma Sodium — Causes, Consequences, and Correction." New England Journal of Medicine, 372(1):55–65. DOI: 10.1056/NEJMra1404489. PMID: 25551526. (Hyponatremia as a disorder of water balance relative to sodium; normal range, clinical consequences, and correction.)
U.S. FDA, Code of Federal Regulations Title 21: §100.155 (salt and iodized salt; iodide added as cuprous iodide or potassium iodide per §§184.1265, 184.1634) and §172.490 (sodium ferrocyanide / yellow prussiate of soda as anti-caking agent). On dextrose as an iodide stabilizer: U.S. Department of Agriculture, Agricultural Marketing Service (2024), Full Scope Technical Report: Potassium Iodide — Handling (dextrose and sodium thiosulfate added to inhibit oxidation and iodine loss). On the refining sequence and purity range: "Table Salt," in Encyclopedia of Food and Health (Elsevier), via ScienceDirect Topics — refined table salt is produced by brine purification and evaporation to a sodium-chloride content generally exceeding 99% (dry basis, exclusive of additives).
NOVA food classification — salt (mined or from seawater) as a Group 2 processed culinary ingredient; iodized salt remains Group 2. Monteiro, C.A., et al. (2019). "Ultra-processed foods: what they are and how to identify them." Public Health Nutrition, 22(5):936–941.
Fayet-Moore, F., Wibisono, C., Carr, P., et al. (2020). "An Analysis of the Mineral Composition of Pink Salt Available in Australia." Foods, 9(10):1490. DOI: 10.3390/foods9101490. PMID: 33086585. (n=31 pink salts; >30 g/day needed for meaningful mineral contribution; one sample exceeded the lead limit.)
Guérande / Brittany (Celtic) grey salt. Legal protection: Commission Implementing Regulation (EU) No 238/2012 of 19 March 2012, entering "Sel de Guérande / Fleur de sel de Guérande" in the register of protected designations of origin and protected geographical indications (PGI), OJ L 80; product class 2.6, Salt; France. https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32012R0238. Production characteristics recognised in the PGI specification — traditional and manual harvesting, unwashed and unrefined product, absence of additives — per APROSELA, the body officially recognised by France's INAO as the defence and management organisation (ODG) for the designation. Sel gris is raked from clay-lined ponds (œillets) by paludiers using wooden tools, with evaporation driven by sun and wind; fleur de sel is skimmed from the water's surface. Higher magnesium-chloride content accounts for the persistent moisture.
Icelandic geothermal flake-salt production. Seawater from Iceland's Westfjords, evaporated using geothermal heat and hand-harvested as pyramid flakes without anti-caking agents. Sourcing caution, stated rather than hidden: the widely repeated specifics — a 93°C (206°F) geyser-water process temperature and the framing as a revival of an 18th-century Danish-established method — originate in the producer's own materials (Saltverk, "Story") and are reproduced substantially verbatim across press coverage including Forbes (2021, 2023) and New Hope Network (2026). They are producer claims repeated, not independently measured or historically documented in a source we could locate, and the temperature figure has therefore been removed from the comparison table above. Closest to an independent process account: Hakai Magazine (2022), "Coastal Job: Artisanal Salt Maker," describing geothermal water circulated through pipes and radiators to boil seawater in open pans, followed by raking, draining, and drying — though the account is given by a company employee. Geographic note: the operation is at Reykjanes in the Westfjords (Ísafjörður), which is distinct from the better-known Reykjanes Peninsula in southwest Iceland; some coverage conflates the two.
U.S. FDA, Code of Federal Regulations Title 21 §100.155, establishing labeling provisions for "salt" and "iodized salt." FDA does not establish a separate standard of identity prescribing a particular mineral composition or production method for products labeled "sea salt"; general federal prohibitions against false or misleading labeling still apply. See also FDA, Guidance for Industry: Colored Sea Salt.
Stock, S.R. (2015). "The Mineral–Collagen Interface in Bone." Calcified Tissue International, 97(3):262–280. DOI: 10.1007/s00223-015-9984-6. PMID: 25824581. PMCID: PMC4727835. (Bone as a biological composite: type-I collagen matrix reinforced by carbonated-hydroxyapatite mineral.)
Antoniac, I.V., Antoniac, A., Vasile, E., Tecu, C., Fosca, M., Yankova, V.G., Rau, J.V. (2021). "In vitro characterization of novel nanostructured collagen-hydroxyapatite composite scaffolds doped with magnesium with improved biodegradation rate for hard tissue regeneration." Bioactive Materials, 6(10):3383–3395. DOI: 10.1016/j.bioactmat.2021.02.030. PMID: 33817417. PMCID: PMC8005775. (Bone modeled as a type-I collagen matrix reinforced by calcium-phosphate mineral, with magnesium incorporated into the experimental mineral phase.)
Muñoz-Garach, A., García-Fontana, B., Muñoz-Torres, M. (2020). "Nutrients and Dietary Patterns Related to Osteoporosis." Nutrients, 12(7):1986. DOI: 10.3390/nu12071986. PMID: 32635394. (Roles of calcium, phosphorus, magnesium, vitamin K, zinc and other nutrients in bone, distinguishing biological importance from proven supplementation benefit.) See also Bleizgys, A. (2024), "Zinc, Magnesium and Vitamin K Supplementation in Vitamin D Deficiency: Pathophysiological Background and Implications for Clinical Practice," Nutrients, 16(6):834, DOI: 10.3390/nu16060834, PMID: 38542745.
U.S. FDA. Sodium in Your Diet (Food Facts). — Statement that the salt shaker is not the main cause of dietary sodium; the majority arrives already in packaged and restaurant food.
Harnack, L.J., Cogswell, M.E., Shikany, J.M., et al. (2017). "Sources of Sodium in US Adults From 3 Geographic Regions." Circulation, 135:1775–1783. DOI: 10.1161/CIRCULATIONAHA.116.024446. (70.9% added outside the home; 14.2% inherent; 5.6% home cooking; 4.9% at the table.)
Centers for Disease Control and Prevention. Get the Facts: Sources of Sodium in Your Diet. — Top food-category contributors; bread ~80–230 mg/slice; deli/cured meat ~750 mg/serving.
Hatch-McChesney, A. & Lieberman, H.R. (2022). "Iodine and Iodine Deficiency: A Comprehensive Review of a Re-emerging Issue." Nutrients, 14(17):3474. (Iodine physiology, pregnancy requirements, U-shaped risk of deficiency and excess.)
Kumar, P. & Behrens, M. (2024). "Influence of Sodium Chloride on Human Bitter Taste Receptor Responses." Journal of Agricultural and Food Chemistry, 72(18):10531–10536. DOI: 10.1021/acs.jafc.3c08775. PMID: 38663860. PMCID: PMC11082923. (NaCl affected only particular bitter-receptor–compound pairs — TAS2R16 showed reduced signaling — while others were unchanged; the effect is selective, not universal.)
Li, X., Shi, B., Chen, R., Li, H., Zhang, L., Zhao, L. (2025). "Sodium Reduction Through Sensory Interactions With NaCl: Strategies and Underlying Mechanisms." Food Science & Nutrition, 13(7):e70548. DOI: 10.1002/fsn3.70548. PMID: 40625626. PMCID: PMC12231224.
Fazzino, T.L., Rohde, K., Sullivan, D.K. (2019). "Hyper-Palatable Foods: Development of a Quantitative Definition and Application to the US Food System Database." Obesity, 27(11):1761–1768. PMID: 31689013.
Neal, B., Wu, Y., Feng, X., et al. (2021). "Effect of Salt Substitution on Cardiovascular Events and Death" (SSaSS). New England Journal of Medicine, 385:1067–1077. DOI: 10.1056/NEJMoa2105675. PMID: 34459569. (n=20,995; 75% NaCl / 25% KCl; 14% lower stroke, 13% lower major CV events, 12% lower death; no significant increase in serious adverse events attributed to hyperkalemia; people reporting serious kidney disease or use of potassium-raising medications were excluded, and potassium was not routinely measured in every participant.)
Systematic reviews of low-sodium salt substitutes: Cochrane (Brand, A., et al., 2022, PMID: 35944931) — probable BP reduction, caution in impaired kidney function; Yin, X., et al. (2022), Heart (PMID: 35945000) — lower total and CV mortality. Most outcome evidence derives from SSaSS, where discretionary salt was the main sodium source.
World Health Organization. Sodium reduction (fact sheet, WHO.int). WHO recommends less than 2,000 mg/day sodium — equivalent to less than 5 g/day salt — for adults.
Punjab rock salt ("pink Himalayan"). Geological origin: UNESCO World Heritage Centre, Tentative List entry, "The Salt Range and Khewra Salt Mine" (Pakistan), https://whc.unesco.org/en/tentativelists/6118/ — the Salt Range formed roughly 800 million years ago through evaporation of a shallow sea followed by under-thrusting of the Indian Plate, and contains the thickest rock-salt seams in the world within the Precambrian Salt Range Formation. Extraction: the Khewra mine in Jhelum District, Punjab, is operated by the Pakistan Mineral Development Corporation, a Pakistani state enterprise (pmdc.gov.pk). Product characterisation of pink salt as sold, including the mineral analysis referenced in this article, is from Fayet-Moore et al. (2020) at Reference 5. (Note: the widely repeated "room and pillar, 50% extraction" detail is not included here — the sources for it that we could locate are salt retailers and travel sites, not the operator or a geological survey, and the article makes no claim requiring it.)
Baja California salt production. Pacific side (documented): NASA Earth Observatory (2022), "A Salty Sanctuary in Baja California Sur," https://www.earthobservatory.nasa.gov/images/149735/a-salty-sanctuary-in-baja-california-sur — Laguna Ojo de Liebre on Mexico's Pacific coast, seawater evaporated and crystallized in ponds covering approximately 33,000 hectares, imaged by Landsat 8 OLI. See also Western Hemisphere Shorebird Reserve Network, site profile "Complejo Lagunar Ojo de Liebre – Guerrero Negro." Operator: Exportadora de Sal, S.A. de C.V. (ESSA), majority-held by the Mexican state with a Mitsubishi minority stake. Disclosed rather than omitted, though not bearing on how the salt is made: the works lie within the Vizcaíno Biosphere Reserve beside a gray whale calving lagoon and carry a documented history of environmental dispute, including bittern discharge investigated in connection with a green sea turtle die-off in 1997. Gulf side ("Sea of Cortez"): no independent documentation of harvesting or processing method located. Descriptions available to us originate with producers and are therefore not cited here as verified — the gap is stated in the body rather than papered over.

Sourcing note: this article cites FDA and USDA regulations and technical reports by section or title, peer-reviewed studies and reviews with DOI/PMID where available, and WHO and CDC public-health guidance. References favor primary sources and named systematic reviews; where a claim rests on commercial or promotional material, that is stated in the reference rather than obscured. Cross-link targets resolve once the site structure is live. Reading time is measured, not asserted: body words excluding the reference list and the metadata header, counted at 225 words per minute and rounded to the nearest minute.