Supplements and endocrinologist appt

[Sodo]

Hi, I've booked to see a private endocrinologist about my hypothyroidism on Fri, and I'm just wondering if any of the supplements I'm taking could affect any thyroid blood test results? I take selenium, zinc, magnesium, b-complex and methylcobalamin, vit d. I'm on 200mcgs of thyroxine per day, but take my supplements late evening. I'm assuming they may want to do a fresh blood sample, but I'm not sure at the min.

[humanbean]

Yes, there is a possibility that your B-Complex could affect your results, if it contains biotin.

Most B-Complex supplements do. Don't take your B-Complex between now and the test. Two days without biotin is probably ample. You want to make sure you don't have lots of biotin in your blood stream.

For an explanation of why avoiding biotin is necessary :

healthunlocked.com/thyroidu......

Since writing the above post it now turns out that biotin affects far more than just Thyroid Function Tests :

endo.confex.com/endo/2016en...

ddtjournal.com/action/downl...

[Sodo in reply to humanbean]

That's really interesting, I never knew any of that! Good job I checked really. Thank you for your quick reply! 😊

[Clutter in reply to Sodo]

Sodo,

Remember to leave taking Levothyroxine until after your consultation in case a blood test is sprung on you.

[Sodo in reply to Clutter]

Thanks will do. It would be a costly mistake to skew any results with going private. My appt is mid morning, but I'll fast too just in case. Thanks 😊