Querying Biotin before a blood test.

[Ellie-Louise]

I know it’s best to stop taking Biotin supplements before having a blood test, but does that advice apply to toiletries too?

I use Biotin shampoo and conditioner.

[Clutter]

Ellie-Louise,

I've only seen reports that biotin supplements can skew blood results.

[Ellie-Louise in reply to Clutter]

Thanks Clutter 🙂

[helvella Administrator Thyroid UK]

Ordinary intake of biotin is not an issue - like we might have in our diet. It is higher doses that affect some blood tests. (Note: not all tests are affected.) What we get in specific vitamin B supplements. Most especially the very high doses of biotin used by some multiple sclerosis sufferers.

My guess (and it is no better than that), is that shampoo and conditioner is unlikely to have any significant effect, actually, I doubt if it would have any measurable effect.