Iron Studies Timing With Iron Supplement Use
A 24-hour pause from taking iron-containing supplements before blood collection is recommended for the “Iron and Total Iron-Binding Capacity, Serum” test panel. [1]
Practical Stop Interval for Oral Iron
- Stop taking iron-containing supplements for 24 hours before specimen collection for serum iron and related iron-binding index measurements. [1]
Test-Specific Considerations
- The 24-hour hold recommendation is provided for the serum iron and TIBC/percent saturation–type testing panel. [1]
- Ferritin reflects iron stores, and the available source for timing specifically addresses “Iron and Total Iron-Binding Capacity, Serum.” [1]
Administration Timing
- Specimen collection is generally preferred before noon for the iron studies test described in the Mayo Clinic Laboratories catalog. [1]
When Holding Iron May Not Be Appropriate
- Medication changes should be coordinated with the ordering clinician when holding iron is not clinically safe. [2]
Common Pitfall: Inconsistent Preparation
- Drawing blood without a defined interval after stopping iron-containing supplements can introduce variability in serum iron–related measurements. [1]
Documentation for Baseline Establishment
- Recording the last dose time and the timing of specimen collection relative to the last dose supports comparability across repeated testing. [1]