Transferrin is an iron-transport protein, commonly measured as transferrin saturation or total iron-binding capacity. There is no strong, direct evidence linking transferrin levels to allergies. However, iron status can modulate immune function: iron deficiency may impair T-cell responses and increase susceptibility to infections, while some observational studies suggest a link between low iron and higher risk of atopic dermatitis or allergic rhinitis. Conversely, iron overload can promote oxidative stress and inflammation. The evidence is mostly mechanistic or observational (human-moderate), not from randomized trials. If your transferrin is abnormal, focus on a full iron panel (ferritin, serum iron, TIBC, CRP) and consult a physician. For allergies, specific IgE testing or skin prick tests are needed. Consumer DNA or lab tests for transferrin alone are insufficient to assess allergy risk. Do not self-diagnose allergies based on transferrin values.
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