Would Biotin affect a vit D blood result

[jamjar67]

I need to book a Vit D test at the hospital and wondered if I should stop my B vits beforehand?

Tks

[helvella Administrator Thyroid UK]

I'd consider contacting the hospital lab and asking them.

Indeed, it might be worth looking for the pathology lab handbook online - that might say something already. You never know until you look!

[jamjar67 in reply to helvella]

I didn’t even know you could do that !

[Buddy195 Administrator]

When doing a home blood test (finger prick) I stay off Vit D for week. I’ve found that the K2 in my D3 supplement causes my blood to clot more easily & the blood draw is easier if I stop taking it for a few days.

I’m not sure if Biotin will have any effect on the Vit D test, so would follow Helvella’s advice & check directly or put your test off a few days.

[jamjar67 in reply to Buddy195]

Well I found the handbook but where to look!! 🤷‍♀️🥴 Think I’ll just stop my vits until after my test next week - it’s easier!

[helvella Administrator Thyroid UK in reply to jamjar67]

Have you downloaded a PDF? Just search it for "biotin".

Are you viewing it online? Search the site. (You can add site:thisismypathlab.nhs.uk - or whatever to a Google search.)

[jamjar67 in reply to helvella]

Thanks, I did try this but it was just too complicated for me.

[SeasideSusie Remembering]

jamjar67

It depends on the amount of biotin you are taking. Generally it's large amounts of biotin that affect blood tests. It also depends on whether biotin is used in the testing procedure.

This article on labtestsonline website mentions which tests can be affected and Vit D is included in the list.

labtestsonline.org/articles...

Click on the + sign where it says

What are some common tests that may be affected by biotin?

Most B Complex supplements contain what would be classed as a small dose of Biotin and if you're concerned then just leave off for a couple of days which is what Medichecks suggest for thyroid tests.

[jamjar67 in reply to SeasideSusie]

Thank you for that - I'm currently taking 1 x Igennus Super B vit a day (so that would be 150ug), my appt is on Tues so I just wont take any more until after the test. It says on the link you shared some people get rid of biotin in a few hours some its a few days, this will give me 5 clear days so I should be ok.👍