Sample collection information and FAQs

When we process your order, we will send you an 'Order Complete' email including any special instructions about taking the test you have purchased. 

It's really important that you review these instructions before collecting your sample.

Once you've collected your sample, please package this into the return envelope provided, and send this back to us. Please see below for further guidance:

I don't know when my postal collection times are.
You can find this information on Royal Mail's website here.

Can temperature affect my sample?

Extreme temperatures can affect blood samples. If a sample is exposed to direct sunlight, drops below freezing, or exceeds 36°C, there’s a chance it may become unusable. Our laboratories will notify us if your sample has been compromised by the weather, and we’ll arrange a repeat test if needed.
Where should I store my sample before posting?
We suggest storing your sample in a cool, dark place until it's time to post it. By "dark," we mean somewhere out of direct sunlight to help keep it stable.

I have taken my sample on either a hot or freezing day; what happens next?

We would recommend waiting as close as you can to your local postal collection time.

What if my test has a specific sample time?

Still keep to the advice in your special instructions which will mention any specific sample times that you will find in your confirmation email.

If it is not possible to meet all of these requirements, don't worry, but you may wish to wait for warmer/cooler UK temperatures to avoid the possibility of retesting. All tests are valid for 120 days from purchasing to allow time for you to complete your test. 

What happens if my sample is spoiled?

If your sample is affected by extreme temperatures, don't worry. We will get in touch to arrange a repeat sample, if needed. 

There are some markers, such as haematocrit (Hct), that are more sensitive to temperature changes. Our clinicians are aware of this and will take it into consideration when reviewing your results.