Caffeine and tsh

[Portia1974]

Yesterday I was given a blood test form by my new GP including thyroid. (TSH only from what I can see 😩) . I was planning on going first thing this morning to the phlebotomy clinic. However I was on autopilot and made myself a coffee. Remembering the advice here to have water only prior to a test I did a quick Google to see what impact caffeine might have on a test result and found this:

ncbi.nlm.nih.gov/pubmed/610...

Thought it may be of interest here. (I won't be getting my blood test done today!)

[Aurealis]

Interesting and from 1980 yet we aren’t being advised to avoid it before a test yet, despite so much reliance on test results. Thanks for posting.

[SlowDragon Administrator]

Also remember to not take Levothyroxine in 24hours before test. Delay dose and take straight after

[Portia1974 in reply to SlowDragon]

Undiagnosed so not under any treatment but appreciate it anyway 💙