Understanding the link between specific nutrient deficiencies and neuropsychiatric symptoms can improve diagnostic accuracy and treatment outcomes. First, B12 and folate deficiency impairs serotonin and dopamine synthesis, a reversible cause of depression that is frequently missed in clinical evaluation. Second, zinc and magnesium depletion reduces both dopamine and GABA function, lowering mood resilience and increasing anxiety risk—common findings in patients with treatment-resistant symptoms. Third, iron deficiency impairs cognitive development, attention, and mood regulation across all ages, with particular impact on children and menstruating women.
For clinicians: if psychiatric or cognitive symptoms persist despite appropriate pharmacotherapy, consider micronutrient screening. For patients: persistent mood or memory complaints warrant nutritional assessment alongside standard psychiatric evaluation. Targeted micronutrient repletion may provide the missing piece in otherwise incomplete treatment plans.
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