One day Rohan's uncle visited his place. Rohan prepared dinner for him. When he was about to put rock salt on the salad, his uncle interrupted him and asked to put iodised salt instead of rock salt. He also advised him to prefer iodised salt instead of rock salt. Why our think Rohan's uncle advised him to have iodised salt instead of rock salt?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Types of Salt**: Rohan was about to use rock salt, which primarily consists of sodium chloride (NaCl). On the other hand, iodized salt is regular salt that has been fortified with iodine.

2. **Importance of Iodine**: Iodine is an essential nutrient that our body needs to function properly. It plays a crucial role in the production of thyroid hormones, which are vital for regulating metabolism and growth.

3. **Health Implications of Iodine Deficiency**: If a person does not get enough iodine, it can lead to health issues, the most notable being goitre. Goitre is an enlargement of the thyroid gland, which can occur due to insufficient iodine in the diet.

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