Current challenges in meeting global iodine requirements

Area of Science:

• Nutrition Science
• Endocrinology
• Public Health

Background:

• Iodine deficiency disorders (IDDs) impact 2 billion people worldwide.
• IDDs result from inadequate thyroid hormone production, leading to goiter and endemic cretinism.
• Thyroid hormone is crucial for fetal and childhood brain development.

Purpose of the Study:

• To highlight the global impact of iodine deficiency.
• To discuss dietary sources and the effectiveness of various prevention strategies.
• To address challenges posed by reduced salt intake recommendations.

Main Methods:

• Review of global iodine deficiency prevalence and consequences.
• Analysis of dietary iodine sources.
• Evaluation of public health strategies for iodine deficiency prevention.

Main Results:

• Iodized salt is a primary dietary source; many foods are poor sources due to soil deficiency.
• Universal Salt Iodization (USI) is the most effective strategy for mandatory fortification.
• Iodine supplementation is less efficient and sustainable than USI.

Conclusions:

• Universal Salt Iodization is the recommended public health strategy for preventing iodine deficiency disorders.
• Decreasing salt intake presents new challenges for iodine sufficiency.
• Ensuring adequate iodine intake is critical for global health, especially for pregnant women and children.