(b) Why is the use of iodised salt advisable?

• We consume iodised salt in our diet, it contains iodine which is necessary for producing thyroxine in the thyroid gland.
• Thyroxine controls the metabolism of carbohydrates, fats and proteins and hence helps in the proper growth of the body.
• The decreased intake of iodine causes a condition called goitre that leads to the swelling of the thyroid gland which is visible as a swollen neck.