You're supposed to stop biotin a week before your tests right? They only test thyroid not vitamins (have fought for it but no I'll have to get those privately).
Took biotin last night (tue). Didn't take for a few days before yesterday. Tests are on Fri.
Do you think I need to push my tests back so I have a week in between?
I feel rubbish and think they need to up Levo. Don't want to effect it so they say wait another 6 weeks before tests.
You don't say how much you are taking!
At the start of the reports of interference from biotin, the issue was discussed regarding Multiple Sclerosis patients who were taking absolutely massive doses of biotin. Like "three daily doses of 100mg".
The maximum dose of biotin available from a UK chain is 5000 micrograms. That is, 5 milligrams. Just 5% of the dose being used for MS - and probably only taken once a day!
Most "B complex" and other multi-ingredient supplements will have far less.
Our actual established daily requirements are as low as 35 micrograms a day. We might get that much from our diets.
There has never been evidence of interference with tests from the sort of dose we get in our diet.
To begin with, the advice was that two days was plenty of time without biotin. This is very likely plenty for low dose biotin - somewhere near daily requirement level.
To be absolutely sure, it is often suggested laying off biotin for a week. It is a short, easy to remember, safe and probably universally acceptable time. But almost certainly excessively long for people who just get a little biotin in a multivitamin or B-complex.
I feel that while everyone should be aware of the issue, it is getting people excessively worried.
healthunlocked.com/thyroidu...
amazon.co.uk/dp/B00NTUD4HO/...
This is what I take so 100mcg and 200% of daily allowance. But as I just took it once in a few days and I can leave off it for 2 more days so you reckon it'll be ok and I'm worrying about it unnecessarily? 😊
I think you are likely to be fine.
When the issues first started being discussed, two days was often thought to be sufficient. It was later that this extended and extended to the current seven days. I suspect this is partly to provide a single, universally applicable statement/phrase rather than being strictly necessary for all.
Thank you for clarifying!
Tests after Biotin stopped
Biotin 130
Biotin use
How much will timing and biotin affect results?
Biotin & thyroid tests
