Helvy
See an example of the results included with this test.
All nine are inside the lab range. Five have no agreed tighter range.
Ranges shown for female, age 34.
How much iron your body has in storage, the reserve it draws on between meals and through a heavy period.
Source: Vaucher 2012 CMAJ randomised trial, with the WHO 2020 ferritin guideline
Below the range we look for. Inside the lab range.
Next:Nothing needs doing today unless you have symptoms, in which case it is worth discussing with your GP. Your retest in twelve weeks shows whether it moves.
Your ferritin and your transferrin saturation both sit low, and they point the same way. Either one on its own moves with inflammation or with the time of day. The two together are the steadier read.
Source: BSG 2021 iron deficiency guideline, with the WHO 2020 ferritin guideline
What proportion of your iron carriers are actually loaded. It is the best single read of whether iron is reaching the places that need it.
Source: EASL 2022 haemochromatosis guideline, with the RCP iron guidance
Below the range we look for. Inside the lab range.
Next:Nothing needs doing today unless you have symptoms, in which case it is worth discussing with your GP. Your retest in twelve weeks shows whether it moves.
The fraction of your B12 that is bound to the carrier your cells can actually take up. Roughly a fifth of the total, and the part that matters.
Source: NICE NG239 (2024) and NICE MIB40
Below the range we look for. Inside the lab range.
Next:Nothing needs doing today unless you have symptoms, in which case it is worth discussing with your GP. Your retest in twelve weeks shows whether it moves.
Lab range 9 to 30 umol/LNo agreed tighter range
There is no agreed research range for serum iron beyond the laboratory's. It varies by about a third across a single day and rises after food or an iron tablet, so it is read through transferrin saturation rather than on its own.
Inside the lab reference range.
Lab range 2 to 3.6 g/LNo agreed tighter range
There is no agreed research range for transferrin beyond the laboratory's. It rises when iron is scarce and on the combined pill, and falls with inflammation and liver disease.
Inside the lab reference range.
Lab range 45 to 82 umol/LNo agreed tighter range
There is no agreed research range for total iron binding capacity beyond the laboratory's. It is calculated from transferrin rather than measured, and two conversion conventions in UK use differ by about a tenth.
Inside the lab reference range.
Lab range 50 to 250 nmol/LConvention 75 to 125 nmol/L, not a guidelineEndocrine Society 2011, alongside SACN 2016 and ROS 2018
UK guidance sets sufficiency at 50 nmol/L, and that figure is the well-evidenced one. The 75 to 125 band is a convention from a different jurisdiction, so it is stated in prose next to the UK figure and never drawn as a band. ng/mL times 2.5 gives nmol/L.
Inside the lab reference range.
Lab range 8.8 to 60.8 nmol/LWe look for over 13.4 nmol/LWHO serum and red cell folate thresholds
Where we look for it.
Lab range 0.7 to 1 mmol/LNo agreed tighter range
There is no agreed research range for serum magnesium beyond the laboratory's. Under one percent of the body's magnesium is in the blood and the kidneys defend that level, so a result in the middle of the laboratory's range does not tell you what your intake has been.
Inside the lab reference range.
Next:For the markers above: nothing needs doing today. Your retest in twelve weeks shows whether they move.
This is your lab result and general information about each marker. It is not a diagnosis and it is not medical advice. One blood test is a snapshot of one day. If a result worries you, or you have symptoms, speak to your GP.
Reference ranges in this example come from static demonstration data and published UK reference intervals. Your own laboratory’s ranges may differ. This sample cannot interpret a result from another test.
How we choose the ranges we showCheck the test, the collection process and the one-off price.
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