Sendha Namak vs Table Salt: What Research Says

Clinical summary

Sendha namak (rock salt) and iodised table salt are both ~97–99% sodium chloride, so they raise blood pressure identically at equal weight. Rock salt's trace minerals are nutritionally negligible, while unfortified rock salt as a household default risks inadequate iodine intake — a real concern in pregnancy, childhood and thyroid disease. Reducing total salt matters; switching salt type does not.

Frequently asked questions

Is sendha namak better than table salt for blood pressure?

No. Both are about 97–99% sodium chloride and deliver roughly the same sodium per gram, so rock salt does not lower blood pressure. Only reducing total salt intake does.

Does rock salt contain useful minerals?

Only traces. Minerals make up under about 2% of rock salt, so at a healthy 5 g/day intake you get a nutritionally insignificant amount — far less than from dal, curd or green vegetables.

Is rock salt iodised?

Usually not, unless the label specifically says iodised. Replacing all iodised salt with plain rock salt can lead to inadequate iodine intake, which matters most in pregnancy, childhood and thyroid disease.

How much salt should an Indian adult eat per day?

Under 5 g of salt (about 2,000 mg sodium) daily for healthy adults — roughly one level teaspoon, including salt hidden in pickles, papad, namkeen and sauces. People with hypertension or kidney disease should follow their clinician's lower limit.

Why is sendha namak used during fasting?

It is a traditional and religious practice — sendha namak is considered unprocessed and permitted during vrat. That is a cultural reason, not a health advantage.