Dr Bhupendra Verma, Interventional Cardiologist, Ujala Cygnus Group of Hospitals shares differences among them as:
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Refinement level
Rock salt is less refined compared to table salt (and iodized salt), which undergoes a more thorough refining process.
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Appearance and texture
Rock salt is coarser and may have a grayish color, while table and iodized salt is fine-grained and white.
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Trace minerals
Rock salt may contain trace minerals and impurities, while table and iodized salt is more purified.
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Iodine content
Iodized salt is fortified with iodine, which is not present in rock salt or regular table salt.
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Health considerations
Iodized salt helps prevent iodine deficiency, while excessive sodium intake from any source, including rock salt and table salt, can have negative health effects.