Regular table salt contains almost no magnesium. It is roughly 99% sodium chloride, with only trace amounts of other minerals remaining after industrial refining. Unrefined salts like Himalayan pink salt and sea salt do contain measurable magnesium, but the amounts are too small to make a meaningful difference in your diet.
Why Table Salt Has Almost No Magnesium
Salt starts out with magnesium in it. Seawater and underground salt deposits naturally contain magnesium alongside sodium, calcium, potassium, and dozens of other minerals. But the refining process strips nearly all of them out on purpose.
During industrial processing, manufacturers add chemicals like lime or sodium hydroxide to the brine. These cause magnesium to clump together and settle out as a solid, which is then filtered away. One study on brine processing found this step removes over 98% of the magnesium. Calcium gets pulled out in a separate stage using carbonate compounds. The goal is a pure, shelf-stable product that pours easily and dissolves cleanly. Magnesium and calcium are hygroscopic, meaning they attract moisture from the air, which would cause the salt to cake and clump. Removing them is a practical choice, not a nutritional one.
Lab analysis of standard iodized white table salt found it contains about 84 mg of magnesium per kilogram. That works out to roughly 0.0084%. At a typical intake of around 5 grams of salt per day, you’d get less than half a milligram of magnesium from table salt. For context, adults need 310 to 420 mg of magnesium daily.
Magnesium in Himalayan Pink Salt and Sea Salt
Unrefined salts retain more of their original mineral profile, and magnesium is one of the minerals present in higher amounts. A 2020 analysis of 31 samples of pink salt sold in Australia found an average magnesium content of about 2,655 mg per kilogram, roughly 30 times more than refined table salt. But the range was enormous: some samples contained as little as 147 mg/kg while others reached nearly 12,000 mg/kg. The color, source region, and degree of processing all influence the final mineral content.
Sea salt falls somewhere in between. It typically retains more trace minerals than table salt because it undergoes less aggressive refining, but the exact composition depends on where the seawater was harvested and how the salt was dried. Grey Celtic sea salt, for instance, tends to have slightly higher magnesium levels than finely ground white sea salt.
Even at the high end, though, the numbers don’t add up to a useful dietary source. If you used a pink salt with the average magnesium concentration from that study, 5 grams of it would give you about 13 mg of magnesium. That’s roughly 3 to 4% of your daily requirement. You would need to eat an unreasonable (and unhealthy) amount of salt to get a significant portion of your magnesium from it.
How This Compares to Real Magnesium Sources
To put these numbers in perspective, a single ounce of pumpkin seeds delivers about 156 mg of magnesium. A half cup of cooked spinach provides around 78 mg. A standard magnesium supplement tablet contains 200 to 400 mg. Even a square of dark chocolate has more magnesium than a full day’s worth of pink salt.
The magnesium naturally present in salt is in inorganic form, primarily magnesium chloride. Oral bioavailability of magnesium generally ranges from 35 to 70%, and your gut actually absorbs a higher percentage when your overall magnesium intake is low. So the tiny amount in salt would be absorbed reasonably well. The problem is purely one of quantity: there just isn’t enough magnesium in any type of salt to move the needle on your intake.
What the “84 Minerals” Marketing Means
Himalayan pink salt is often marketed as containing 84 trace minerals. This is technically true in the sense that spectroscopic analysis can detect dozens of elements in the salt, including magnesium, potassium, calcium, iron (which gives it the pink color), and many others. But “detectable” and “nutritionally relevant” are very different things. Most of these minerals are present in parts per million or even parts per billion.
The iron that gives pink salt its color, for example, is present at concentrations far too low to affect your iron status. The same applies to its magnesium content. Choosing pink salt or sea salt over table salt is a perfectly reasonable preference for flavor or texture, but it’s not a meaningful strategy for increasing your mineral intake. If you’re concerned about magnesium, food sources like nuts, seeds, legumes, leafy greens, and whole grains are where the real numbers are.