ISSA Nutritionist Practice Exam 2026 - Complete Preparation Guide

Table salt is often fortified with iodine to help prevent iodine deficiency, a condition that can lead to serious health issues such as goiter (an enlargement of the thyroid gland) and hypothyroidism. Iodine is an essential nutrient that is crucial for the synthesis of thyroid hormones, which regulate metabolism, growth, and development in the body. In many parts of the world, iodine levels in the soil are low, leading to inadequate dietary intake of this vital mineral.

The fortification of table salt with iodine has been an effective public health measure to ensure adequate iodine consumption and to reduce the prevalence of iodine deficiency disorders. This practice began in the early 20th century and has contributed significantly to the overall health of populations in many countries.

While potassium, calcium, and magnesium are important minerals, they are not commonly added to table salt in the same way iodine is. Potassium, for instance, is a mineral often found in foods like bananas and leafy greens, while calcium is typically fortified in dairy products and some plant-based alternatives. Magnesium, though essential for numerous bodily functions, is not typically added to table salt either. Thus, the choice to fortify table salt with iodine specifically addresses the public health issue of iodine deficiency directly.