Blood Testing

Iron is a notable exception among micronutrients in that it is meaningfully tracked through serum ferritin. Standard blood panels measure plasma concentration, which reflects only a tiny fraction of total body micronutrient stores. Blood analysis is presented as unreliable for assessing nutritional status. A "normal" result on a lab report indicates the value is within a population reference range, not that the level is sufficient for optimal function. Blood tests measure circulating nutrients and may miss nutrients stored in tissues. The body sacrifices nutrient stores in tissues and organs to maintain blood concentrations within a normal reference range. The body keeps blood chemistry tightly controlled to support vital functions. Blood-based diagnosis can lead to treatment that worsens nutritional imbalances.