
Why Standard Blood Tests Miss Cellular Vitamin Deficiencies
Standard serum blood tests often fail to detect subclinical nutrient deficiencies because essential vitamins and minerals reside primarily inside cells rather than in liquid blood serum.
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Standard serum blood tests often fail to detect subclinical nutrient deficiencies because essential vitamins and minerals reside primarily inside cells rather than in liquid blood serum.

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Central to immunity, healing and hormone synthesis — and in direct competition with copper for absorption, which is why sustained high doses create a new deficiency.