Assess zinc status using serum zinc levels and clinical indicators. Deficient: serum zinc below 70 mcg/dL (below 10.7 micromol/L). Normal: 70-120 mcg/dL. Clinical features: acrodermatitis enteropathica (perioral/perianal rash), delayed wound healing, hypogeusia/anosmia, growth retardation, immune dysfunction, hypogonadism. Serum zinc poorly reflects body zinc stores due to acute phase reaction.
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