Will having a cold impact blood test?

[Wired123]

A family member is booked in for an NHS blood test. Would having a slight cold impact results? If this appt is cancelled another one will not be available for 3 weeks.

[SeasideSusie Remembering]

Dk123

Presumably a thyroid test?

If so it's advised to delay test when one has an acute infection (as a cold would be) as this can affect results. The appointment in 3 weeks' time would appear to be more suitable as hopefully they will then be fully over the infection. If not, it would be sensible to delay further.

[Sweetpeaflower]

Just wanted to inform that even a slight cold might influence ferritin levels (iron storage) too. Just in case your family member is having this tested.

I hope your family member will feel better soon!

[SeasideSusie Remembering in reply to Sweetpeaflower]

Indeed, infection can raise ferritin level Wired123