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Sea Salt vs. Table Salt: Which Is Healthier?

By Terita Heath-Wlaz

Time for a dash of salt on that sheet pan of roasted veggies. What do you reach for? Pink Himalayan crystal salt? Hawaiian red salt? Black lava salt? Or, good old Morton's table salt?

Colorful, exotic sea salts are marketed as minimally-processed, healthful alternatives to refined table salt. Photo credit: Shutterstock

Colorful, exotic sea salts are marketed as minimally-processed, healthful alternatives to refined table salt. But since your individual diet and health influences what you need from salt, it's worth examining the claims and true differences among salts before you choose.

Processing in Sea Salt vs. Table Salt

It's true that sea salt undergoes less processing than table salt; it's produced simply by evaporating water from oceans or salinated lakes. Trace minerals like potassium, calcium and magnesium remain in sea salt, altering its texture, flavor and nutritional content in subtle ways.

Table salt, on the other hand, is mined from salt deposits underground. Manufacturers strip the salt of minerals to yield a uniformly white color, grind it to a fine consistency and add an anti-caking agent like calcium silicate. Finally, most table salts contain added iodine to combat iodine deficiency and goiter.

Many consumers gravitate toward sea salt because of its “close-to-nature" status–and its easy to understand why! We know minimal processing benefits our health when it comes to grains, meats and vegetables, so shouldn't the same be true for salt?

There's more to consider.

Trace Minerals

The promise of trace minerals in sea salt is alluring, but experts with the American Heart Association note that most minerals in sea salt occur plentifully in other foods. If you eat a varied diet rich in fruits, vegetables, whole grains and legumes, you likely already consume plenty of potassium, magnesium, calcium and other nutrients.

Sodium Content

By weight, the amount of sodium in sea salt and table salt is roughly equal. That means if you're trying to keep your sodium intake below the recommended limit of 2,300 milligrams per day, use either type of salt in moderation.

Worthy of note: most sodium we ingest doesn't come from the salt we add to food, but from packaged and processed food. The most effective change you can make to reduce sodium intake is to eat fewer processed foods and less restaurant fare.

Iodine

Dietary iodine added to table salt—but not sea salt—protects the health of your thyroid, which in turn helps regulate your metabolism, heart rate, nervous system and many more functions.

Certain foods supply iodine naturally, including seaweed, fish, yogurt and eggs. If you eat these foods regularly (especially seaweed!), you may be getting the recommended 150 micrograms of iodine your body needs in a day.

If your diet is low in iodine, however (which is common), choosing iodized table salt might act as a good insurance policy for thyroid health.

So, What Should I Choose?

The salt you choose depends on your tastes, nutritional status and diet. If you are neither pregnant nor breastfeeding and you regularly eat iodine-rich foods, you might choose sea salts for their beautiful array of colors, textures and flavors. A little jar of special salt makes a charming gift and if you enjoy eating foods close to their natural state, sea salt can complement your cooking.

But sea salt, unlike table salt, does not supply iodine and its trace minerals probably have little effect on your health. Most importantly, remember that sea salt contains as much sodium as table salt, so whatever you choose, use just a sprinkle!

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