Question 2
Why is the use of iodised salt advisable?

Iodine is essential for the thyroid gland to produce thyroxin hormone. This hormone regulates fat, protein and carbohydrate metabolism in our body. If the quantity of iodine in food is less than required, then the neck will swell up due to the enlargement of thyroid gland. This deficiency disease is known as goitre. Therefore iodised salt is advised.