Nutritional Deficiencies and Their Correlation with Immune Function in Adults: An Evidence-Based Analysis

Abstract

This study investigates the correlation between nutritional deficiencies and immune function in adults through a comprehensive analysis of clinical, biochemical, and epidemiological data. Nutrition plays a pivotal role in maintaining immune competence, with deficiencies in micronutrients such as vitamin D, zinc, iron, selenium, and vitamin C being strongly linked to impaired immune responses. This research integrates data from cross-sectional and longitudinal studies to identify patterns of nutrient inadequacy and their direct association with susceptibility to infections, inflammatory disorders, and autoimmune diseases. Findings reveal that nutrient-rich diets substantially improve both innate and adaptive immune responses, reducing morbidity and promoting overall well-being. The study highlights the necessity of integrating nutritional surveillance into public health strategies for immune resilience enhancement.