Table Salt vs Sea Salt vs Himalayan Salt vs Iodized Salt: What Differs and What Does Not
Table, sea, Himalayan and iodized salt compared: sodium is about the same by weight, iodine is the main documented difference, and trace minerals are small.
Content last updated . This page has not been medically reviewed.
Who should take extra care
- People with high blood pressure, heart or kidney conditions, and anyone told to limit sodium: any salt adds sodium, so ask a clinician what applies to you.
- People with thyroid disease: very high iodine intake can reduce thyroid function, so ask a clinician before changing iodine sources or taking iodine supplements. [3] See Thyroid problems and fatigue.
- Pregnant or breastfeeding women: iodine needs are higher (see table); ask a clinician or pharmacist. See Iodine in pregnancy.
- Babies and young children: the NHS says babies should not have much salt because their kidneys are not fully developed. [4]
What each salt is
| Type | How it is described in the sources | Sodium | Iodine |
|---|---|---|---|
| Table salt | Cheap, common, dissolves quickly; iodine is added to help protect against deficiency [1] | Mostly sodium chloride | Added [1] |
| Iodized salt | Table salt with iodine added; the main food source of iodine [3] | Mostly sodium chloride | About 78 micrograms in 1/4 teaspoon (US) [3] |
| Sea salt | Made by evaporating seawater; minimally processed, with trace minerals such as potassium, iron, calcium and magnesium, not in amounts that replace whole foods [1] | Same by weight as table salt; can differ by volume [1] | Not described as added in the sources we read |
| Himalayan pink salt | Mined mainly from the Khewra Salt Mine in Pakistan; pink color from trace minerals [1] | Mostly sodium chloride [1] | Not described as added in the sources we read |
In the UK survey, sodium plus chloride ranged from about 91% to 104% of weight across seven salts (measurement error of about 5% is expected). [2]
Official intake references
Salt and sodium are not the same: the NHS says 6 g of salt contains 2.4 g of sodium. [5]| Source and year | Population | Value |
|---|---|---|
| NHS (UK), 2020 | Adults | No more than 6 g salt (2.4 g sodium) a day [5] |
| WHO, 2026 | Adults | Less than 2,000 mg sodium (under 5 g salt) a day [6] |
| NHS (UK), 2020 | Adults | Iodine 140 micrograms a day [7] |
| US RDA via MedlinePlus, 2025 | Teens and adults 14+; pregnancy | Iodine 150 micrograms; 220 micrograms in pregnancy [3] |
WHO says all salt consumed should be iodized. [6] Researchers note that cutting population sodium intake may affect iodine intake and should be coordinated with salt iodization programs. [8] See Iodized salt and public health.
What research found about health claims
| Question | What the source found | Strength |
|---|---|---|
| Does Himalayan salt lower blood pressure compared with table salt? | In a crossover study of 17 women with high blood pressure, there were no significant differences in blood pressure or urinary sodium. [9] | Insufficient (very small study) |
| Do "mineral" salts supply meaningful minerals? | Sea salt's trace minerals are not in large enough amounts to replace those in whole foods. [1] | Marketing claim not supported by sources read |
| Do Himalayan "sole water" tonics improve sleep or energy? | Harvard Health says there is no research to prove these claimed benefits. [1] | No good evidence found |
| Do unrefined salts carry contaminants? | A lab study of 10 specialty salts found mineral content varied by type and origin, and lead exceeded the maximum level in all samples. [10] Another study found 0 to 1,674 microplastic particles per kg in sea salts (excluding one higher outlier). [11] | Preliminary (laboratory measurements, not health outcomes) |
Salt is not a good source of minerals according to the UK survey authors; a balanced diet supplies them. [2] Related: Himalayan, sea and other mineral salts: claims checked.
The practical picture
About three quarters of the salt people eat comes from packaged and everyday foods, not the shaker. [4] Harvard Health notes alternative salts can add crunch or flavor but, like table salt, consist largely of sodium chloride. [1] If you cut salt, ask how to keep iodine intake adequate. For potassium-based substitutes, which are not right for everyone, see Salt substitutes.Frequently asked questions
Is sea salt lower in sodium than table salt?
By weight, no: sea salt and table salt contain the same amount of sodium. By volume they can differ because crystal size differs. [1]
Is Himalayan salt healthier?
Harvard Health says alternative salts consist largely of sodium chloride like table salt. [1] In one small crossover study in women with hypertension, blood pressure did not differ. [9]
Do I need iodized salt?
MedlinePlus describes iodized salt as the main food source of iodine. [3] The NHS lists dairy, eggs and sea fish as other sources. [7] Whether you need it depends on your diet and health; ask a clinician.
Can too much iodine be a problem?
Yes. The NHS says high doses of iodine for long periods could change how the thyroid works. [7]
What about sodium chloride supplements?
The UK Department of Health and Social Care, as stated by the NHS, says sodium chloride should not be used in supplements. [5]
References
- Harvard Health Publishing. The salts of the earth. Undated web article. Read 2026-10-23.
- Action on Salt (UK campaign group, Queen Mary University of London). Gourmet Salt Survey. Survey dated 17 November 2011. Read 2026-10-23.
- MedlinePlus (US National Library of Medicine). Iodine in diet. Review date 1/21/2025. Read 2026-10-23.
- NHS (UK). Salt in your diet. Page last reviewed 17 April 2023. Read 2026-10-23.
- NHS (UK). Vitamins and minerals: Others (includes magnesium, sodium chloride and iodine-free minerals). Page last reviewed 3 August 2020. Read 2026-10-23.
- World Health Organization. Sodium reduction (fact sheet). Dated 11 May 2026. Read 2026-10-23.
- NHS (UK). Vitamins and minerals: Iodine. Page last reviewed 3 August 2020. Read 2026-10-23.
- Pearce EN, Andersson M, Zimmermann MB. Global iodine nutrition: where do we stand in 2013? Thyroid 2013;23(5):523-528. PubMed 23472655. Abstract read 2026-10-23.
- Comparison between the effects of Himalayan salt and common salt intake on urinary sodium and blood pressure in hypertensive individuals. Arq Bras Cardiol 2022;118(5):875-882. PubMed 35137791. Abstract read 2026-10-23.
- Di Salvo E, et al. Gourmet table salts: the mineral composition showdown. Toxics 2023;11(8):705. PubMed 37624210. Abstract read 2026-10-23.
- Kim JS, et al. Global pattern of microplastics (MPs) in commercial food-grade salts: sea salt as an indicator of seawater MP pollution. Environ Sci Technol 2018;52(21):12819-12828. PubMed 30285421. Abstract read 2026-10-23.