Timing of tests - Iron, B12 and Folate

[mb008]

Hi

I've bought this test from Medichecks. Does it matter what time of the day I do the blood test? And should it be a fasting test?

Thank-you

[SeasideSusie Remembering]

I do all my tests fasting and early morning, maybe not needed for all of them but it's easier to keep everything the same as far as I am concerned.

If you're supplementing any of them, leave off iron for 5-7 days, otherwise take supplements after test.

[mb008 in reply to SeasideSusie]

Thanks very much. Will do.

[crimple in reply to mb008]

If you are doing any Thyroid tests leave off B vitamins for 4-5 days because Biotin can affect result

[humanbean]

Iron tests of any kind (serum iron, ferritin etc) should always be done first thing in the morning having fasted over night. Just like SeasideSusie, I do all my tests that way, it makes life a lot easier. It is also a good idea to have left off any iron supplements for 7 days before testing (which is what STTM suggests).

I looked all over the place for confirmation that people should avoid iron supplements for a week before testing, and the only place I've found it is here :

americanhs.org/faq.htm

Q: How can I know if I have iron overload/hemochromatosis? What tests should be performed? I hear that there is a DNA genetic test kit for hemochromatosis, is that true?

A: A simple series of blood tests which can be performed by any doctor or lab can indicate iron levels. They must be proper iron measures: Total Iron Binding Capacity (TIBC) together with Serum Iron. Divide TIBC into Serum Iron to get the percentage of transferrin saturation also known as % of saturation.. It is important that the serum ferritin is also performed at the same time and it should be done, if possible, while fasting. Refrain from iron pills for a week prior to the tests.