Dead Sea Salt

Source

Israel / Jordan

Sodium Chloride

~12–18%

Magnesium Chloride

~30–35%

Potassium Chloride

~20–25%

Edible?

Sea salinity

~34% (10× ocean)

What Makes It Different

Most "salts" you've encountered are dominated by sodium chloride. Dead Sea salt is the exception. The Dead Sea — actually a hypersaline lake straddling Israel, Jordan, and the West Bank — has a salinity around 34%, roughly ten times that of ocean water. Crucially, the dissolved minerals are dominated by magnesium and potassium chlorides, with sodium chloride a minority component.

That composition makes Dead Sea salt fundamentally different from any culinary salt: it tastes intensely bitter (from the magnesium), and consuming it in food quantities can cause significant gastrointestinal problems and electrolyte imbalance.

Composition (Approximate)

Component	% by mass	Compare to ocean salt
Magnesium chloride (MgCl₂)	30–35%	~5%
Potassium chloride (KCl)	20–25%	~2%
Sodium chloride (NaCl)	12–18%	~85%
Calcium chloride (CaCl₂)	~3%	<1%
Bromide salts	~1%	trace
Sulfates (SO₄²⁻)	~0.5%	~7%

Composition varies by harvesting location and depth. Notably, sulfate is much lower than in ocean salts, while bromide is much higher — both are direct fingerprints of Dead Sea origin and are sometimes used in laboratory authentication.

Why It's Not for Eating

Do not use Dead Sea salt as a cooking or table salt. The high magnesium chloride content acts as a strong osmotic laxative — even small culinary quantities can cause cramping and diarrhea. The bitter taste is also unworkable in food. Dead Sea salt sold for spa or bath use is not labeled or processed for human consumption.

Legitimate Uses

Bath salts and soaks

The original and most common use. Dissolved in warm bathwater, Dead Sea salt is used for general muscle soak comfort and as adjunct treatment for some skin conditions. Typical dosing is 1–2 cups per standard bath.

Psoriasis and atopic dermatitis

This one has clinical support. "Balneotherapy" with Dead Sea salt — bathing in solutions of Dead Sea minerals, often combined with sun exposure — has been studied repeatedly for psoriasis and atopic dermatitis, with multiple trials showing meaningful symptom reduction compared to plain-water bathing. The mechanism is thought to combine osmotic effects on inflamed skin with magnesium absorption and barrier-function improvement.

Cosmetic exfoliants

Coarser Dead Sea salt is used in commercial scrubs and at-home exfoliating products, usually combined with carrier oils.

Industrial / mineral extraction

Industrial harvesters extract bromine and potash from the Dead Sea at large scale; salt is a byproduct of these operations.

What Dead Sea Salt Won't Do

Detoxify the body. "Drawing out toxins" through the skin during a salt bath is a marketing claim, not a physiological process — your kidneys and liver handle detoxification.
Provide significant transdermal magnesium. Magnesium absorption through intact skin is small and unlikely to meaningfully affect serum magnesium in healthy adults. The skin-condition benefit appears to be local, not systemic.
Cure systemic disease. Bath therapy can help symptoms of certain skin conditions; it doesn't cure them.

Sourcing & Authenticity

The Dead Sea is shrinking. Industrial water diversion has dropped the lake's level by more than 30 meters since the 1960s, and authentic Dead Sea salt comes only from a narrow band of producers in Israel and Jordan. "Dead Sea salt" sold at very low prices is often standard sea salt with added magnesium and potassium chloride. For therapeutic use (e.g., dermatologist-recommended psoriasis baths), look for product certified by Israeli or Jordanian Dead Sea producers, and check that the magnesium content matches the values above.

Safety Notes for Bath Use

Avoid getting concentrated solution in the eyes — it stings significantly.
Don't use on broken skin without checking with a clinician — high osmotic strength can sting open wounds.
People with cardiovascular conditions sensitive to hot baths should follow normal precautions; the salt itself doesn't change those.
Rinse off after a long soak to avoid skin dryness; follow with moisturizer.

Bottom Line

Dead Sea salt is a non-edible specialty product with a narrow, well-supported use case (bathing, especially for psoriasis and atopic dermatitis) and a much wider field of overstated marketing claims. Buy it for skin care if a clinician suggests it; ignore the "detox" and "transdermal mineral" marketing; never season food with it.