Is Transferrin useful for Haut?

Transferrin is an iron-transport protein primarily used to assess iron status (e.g., deficiency or overload). There is no direct, evidence-based use for skin health in consumer tests. While iron metabolism can affect the skin (e.g., pallor in anemia, hyperpigmentation in hemochromatosis), transferrin itself is not an established biomarker for skin aging, collagen quality, or acne. Claims that a transferrin test is 'useful for skin' are not scientifically supported and are likely marketing-driven. For improving skin health, clinically validated markers such as vitamin D, zinc, omega-3 fatty acids, or inflammatory markers are more relevant – and should be discussed with a physician. A standalone transferrin value without context (e.g., ferritin, hemoglobin) is not meaningful for skin diagnostics.