Celtic Salt vs. Himalayan Salt: Gray Sea Salt and Pink Rock Salt Compared

One is damp and gray, the other dry and pink, and that’s most of the story: the real differences between Celtic salt and Himalayan salt are moisture, crystal and color. Nutrition isn’t one of them, since both are overwhelmingly sodium chloride. They do come from opposite ends of the salt world. “Celtic salt” usually means Celtic Sea Salt, a brand founded in 1976,¹ whose Light Grey Celtic is a moist gray sea salt of the kind French producers call sel gris; Himalayan salt is rock salt, mined in Pakistan and tinted pink by traces of iron oxide. As for the gray, the official specification for Guérande gray salt traces its color to fine particles of clay.²

Side by side

The weight and sodium rows come from two brands’ own labels, not independent measurements, and they only describe those two products.

Where each one comes from

Celtic Sea Salt says it was founded by Dr. Jacques Delangre, who coined the word “Celtic” to honor hand-harvesting methods the company traces back to the Celts and Mayans.¹ That’s the brand’s story. Its FAQ names Spanish locations for two of its other products, but on the pages we read, it doesn’t give a harvest site for Light Grey Celtic.³ If origin matters to you, check the package.

The best-documented gray salt comes from Guérande, where an official French specification spells out the process. Gray salt forms on the clay bottom of the final pans, and the harvester, the paludier, gathers it by hand from the brine. It drains for several hours before storage, isn’t washed, and can’t contain additives. Its color comes from insoluble matter, which the specification describes as fine particles of clay.² So the gray is clay. It’s not a sign of extra magnesium or other dissolved minerals.

Himalayan salt is rock salt. Science-Based Medicine’s Harriet Hall describes the beds as deposited from ancient oceans about 250 million years ago.⁵ The commercial product comes from Pakistan, where the Pakistan Mineral Development Corporation runs the Khewra mine and holds the geographical indication “Khewra Pink Rock Salt.”⁴ Not every “pink salt” comes from there, though. In a 2020 study of 31 pink salts sold in Australia, one sample came from Peru.⁹ Morton only says its pink salt is sourced from the Himalayan Mountains.⁶

Moisture, color and crystals

This is where the two really part ways. Guérande gray salt can hold up to 12% moisture,² and Celtic Sea Salt credits its own salt’s dampness to brine, the “mother liquor,” left in the crystals.³ Himalayan salt is mined from underground rock salt deposits, and we found no published moisture figure for it.

Grain size depends on the product. Morton, for example, sells Himalayan salt both fine and coarse. Gray salt’s damp crystals can be hard to grind. The brand suggests drying them gently over low heat first and skipping metal grinders.³ Neither one is a flaky salt. For flakes, see Maldon sea salt.

You’ll often read that a dry salt like Himalayan draws juices out of a steak faster than damp gray salt does. We found no test of that, so it’s untested.

Is either one healthier?

Not in any way that shows up at normal amounts.

Sodium chloride first. The Codex Alimentarius standard requires food-grade salt to be at least 97% sodium chloride on a dry basis, whether it comes from the sea, rock deposits or natural brine.¹⁰ The American Heart Association says table salt, kosher salt and most sea salts are about 40% sodium.¹¹

What the labels show. Light Grey Celtic’s label gives 480 mg of sodium in 1.5 g, and Morton’s coarse Himalayan gives 570 mg in 1.5 g.⁷⁶ By our math, that’s about 32% and 38% sodium. The Celtic figure is below the usual 40%, and its label doesn’t say why. Moisture could be part of it, since the brand says brine stays in its salt,³ but we found no analysis that confirms it.

Minerals. The best data on pink salt is a 2020 analysis of 31 pink salts bought in Australia. Pink salt carried more calcium, iron, magnesium, manganese and potassium than the white table-salt control. But a 5 g teaspoon made no clinically significant contribution to nutrient intake, apart from sodium. You’d need more than 30 g a day, about 6 teaspoons, before the minerals mattered, and the authors concluded the sodium would cancel out any benefit.⁹ Celtic Sea Salt says its salt contains more than 70 trace minerals and elements.¹ We found no independent analysis of it. Himalayan salt is often advertised with “84 minerals,” a figure we couldn’t trace to any lab analysis. Hall traces it to marketing copy.⁵ The AHA notes sea salt may carry trace minerals like magnesium, potassium and calcium, and that total sodium is what matters for heart health.¹¹

Iodine. Neither one is a source. The NIH Office of Dietary Supplements lists sea salt and Himalayan salt among specialty salts that usually aren’t iodized.⁸ Celtic Sea Salt adds no iodine and reports a natural trace of about 0.2 ppm.³ If you cook only with these salts and count on salt for iodine, see iodized vs. non-iodized salt.

Sodium limits. The FDA’s Daily Value for sodium is less than 2,300 mg a day.¹² Going by the label figures above, a teaspoon of Light Grey Celtic carries about 1,920 mg and a teaspoon of Morton coarse Himalayan about 2,280 mg, by our math.

Contaminants

• Lead. In the 2020 Australian study, one pink salt, the only sample from Peru, had 2.59 mg/kg of lead against the 2 mg/kg limit the authors applied. Cadmium, arsenic and mercury stayed within limits across all 31 samples.⁹ Celtic Sea Salt reports its own typical lead content as about 0.68 micrograms per serving and says it tests each lot.³ That’s the company’s number, and we found no independent test.
• Microplastics. In a 2018 study of 39 salt brands from 21 countries and regions, contamination was highest in sea salt, then lake salt, then rock salt, according to a Greenpeace press release on the study.¹³ The release doesn’t break out gray or pink salt, so it shows a difference between salt types, not between these two products.

In the kitchen

America’s Test Kitchen found that sea salts vary in color but only slightly in flavor, and that they taste no different from table salt once mixed into food. ATK recommends sea salts as finishing salts, scattered on food just before serving.¹⁴ So the choice comes down to what sits on top of your food.

• Celtic salt gives you damp, chunky crystals that hold their shape on steak, roast vegetables, tomatoes and salads. Some people find it tastes brinier eaten whole, but that’s personal taste. We found no measurement of it.
• Himalayan salt, coarse, gives a hard, dry crunch and a pink color that shows up on pale foods like eggs, fish and dressed greens.
• Inside the dish, in soups, pasta water and doughs, the crystals dissolve and the difference disappears.

For Himalayan technique, see cooking with Himalayan salt.

Can one stand in for the other?

Yes, almost always. Just measure with care, because a teaspoon of one isn’t exactly a teaspoon of the other in sodium. The figures below reuse the conversions on our Celtic salt substitute page.

How these were worked out. Both swaps rest on the two brands’ own labels, so they apply to those products, not every gray or pink salt. Morton’s chart treats a teaspoon of its Himalayan salt as equal to a teaspoon of table salt, but a cup of table salt as equal to a cup plus 2 tablespoons of its coarse Himalayan salt. Morton says the chart only applies between Morton products.¹⁵ For a bigger batch, like a brine or a salt crust, weigh the salt.

What no swap reproduces. Pink salt won’t give you gray salt’s dampness, and gray salt won’t give you the pink. If a recipe depends on either, use the salt it was written for.

What isn’t known

• We found no independent lab analysis of Celtic Sea Salt’s minerals, sodium or lead. Its figures here are the brand’s own.
• The brand’s pages we read don’t say where Light Grey Celtic is harvested.
• We found no published moisture figure for Himalayan salt.
• No taste test compares gray and pink salt directly. ATK’s tests pit sea salts against table salt.¹⁴
• We found no dated, sourced price comparison.

Related

• Celtic sea salt and Himalayan salt, the full profiles
• Celtic salt substitutes
• Celtic sea salt vs. table salt
• Himalayan salt vs. table salt, Himalayan salt vs. sea salt and kosher salt vs. Himalayan salt
• Fleur de sel and fleur de sel vs. Himalayan salt
• The best salt for cooking