Q.Iodised salt is essential to prevent :

Iodised salt supplies iodine for thyroxine synthesis; iodine deficiency causes the thyroid to enlarge (goitre), so iodised salt prevents it.

The thyroid gland uses iodine as a key raw material to synthesise the hormone thyroxine (T4), which regulates the body's basal metabolic rate.

When dietary iodine is insufficient, thyroxine production falls. The pituitary gland senses low thyroxine and secretes more TSH (thyroid-stimulating hormone) to compensate, which makes thyroid cells multiply and the gland swell — this enlargement of the thyroid is called goitre.

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