A comprehensive analysis of decade-long US dietary surveillance data reveals a troubling disconnect between food availability and nutritional adequacy. Researchers examining 26,282 American adults found that conventional diets leave the vast majority below recommended intake levels for five immune-critical micronutrients: vitamins D, E, C, and A, plus zinc.
The findings, published in Nutrients (2020) by Dr. Colby A. Reider and colleagues, demonstrate that supplementation, while beneficial, fails to fully bridge this gap. Vitamin D exemplifies the challenge: 95% of adults consuming diet alone fall below the Estimated Average Requirement, a threshold designed to meet the needs of half the healthy population. Even with supplementation, 65% remain inadequate.
These deficiencies carry real physiological consequences, particularly for immune and barrier function. The research underscores the need for both individual dietary awareness and population-level nutritional strategies.
Read the full article on GMJ Newsroom.
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