In what stage of iron deficiency does the value of soluble serum transferrin receptors measure as high as in the blood?

Question

Quizplus · Accepted Answer

Transferrin receptors are generated on the surface of the red blood cells when iron is needed.As iron deficiency develops, so many of the STRs develop that some start breaking off and become soluble in the blood.When high numbers of the STRs are measured, this is usually during Stage II of iron deficiency.During Stage I, STR levels may still measure in the normal range.In Stages III and IV, STR levels are very high.

In What Stage of Iron Deficiency Does the Value of Soluble