Iodine deficiency levels rising in United States population

Recent research published in the Journal of Nutrition indicates that iodine levels in the United States are declining, marking a regression in public health nutrition. Data from 2017 and 2018 shows that 24 percent of women and 30 percent of men aged 14 and older were not receiving adequate amounts of the nutrient, which is approximately double the deficiency rates recorded in 2001 and 2002.

Iodine is a critical component of thyroid hormones, which are essential for brain development in fetuses and young children, as well as lifelong health. While iodized salt successfully reduced the prevalence of goiters in the mid-20th century, the current trend toward specialty salts like Himalayan or sea salt may be contributing to this nutritional gap.

Of particular concern is the impact on pregnant women, nearly half of whom are not consuming sufficient iodine. Elizabeth Pearce, an endocrinologist at the Boston University Chobanian & Avedisian School of Medicine, noted that even mild iodine deficiency during pregnancy can be associated with lower IQ in children.