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Cause of normal iron but low hemoglobin and hematocrit?

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61
What would be some causes of someone having normal or high normal serum iron and percent saturation with lowish ferritin and low hemoglobin and hematocrit? If B6 is normal what else can cause this? Is this related to methylation somewhere? Can low glycine itself cause this type of an issue? Has anyone else ever had this type of a pattern?

serum iron 138 (reference range is (27-159)
iron saturation 42% (15-55)
TIBC 313 (250-450)
UIBC 179 (131-425)
ferririn 49 (15-150)

hemoglobin 11.7 (11.1-15.9)
hematocrit 36.9 (34-46.6)
mcv 91 (79-97)
mch 29 (26.6-33)
mchc 31.7 (31.5-35.7)
rdw 13.8 (12.3-15.4)
RBC 4.04 (3.77-5.28)
wbc 7.2 (3.4-10.8)
 
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