How to take a DNA test: Step By Step Instructions
Taking your DNA sample is quick, simple, and completely painless. Follow the steps below carefully to ensure your results are accurate and processed without delay.
Watch: How to take an at home DNA test
What this shows:
- How to swab your cheek correctly
- How to fill out the consent form
- How to return samples to NorthGene™
Before You Start
Make sure you have everything ready:
- Sample collection kit
- Consent form
- Sample envelopes
- 2 swabs per person
- Pen
Important: Do not eat, drink, smoke, vape or chew gum for at least 30 minutes before taking your sample.
Prefer written instructions? Follow the steps below.

Complete the consent form
Fill in all required details clearly and ensure all participants sign where needed on the back of the form.
Common mistake: Missing signatures or incomplete details can delay results.
Note: For children under the age of 16, a person with parental responsibility must sign on their behalf and note the relationship to the child.

Label the Sample Envelopes
For each participant, wite their details clearly on a Sample Collection Envelope (in block capital) before collecting samples

Prepare the swab
Open one of the packets containing two swabs and take a out a single swab carefully, holding only the handle.
Note: Do not touch the tip of the swab.

Collect the sample
Rub and rotate the swab firmly against the inside of your cheek for 20–30 seconds, rotating as you go. This allows you to collect the cells containing the DNA, not just the saliva.

Place swabs into the envelope
Insert the swabs into the correctly labelled envelope and seal it securely.

Repeat for each participant
For each person being tested, repeat steps 3 to 5 (remember we need two swab samples for each person).

Return your samples
Place all sealed sample envelopes and completed consent forms into the return envelope and post them back to us.
Results will be issued via email within 1-2 working days of samples arriving at our laboratory for testing and analysis.
The legal DNA testing process
For legal DNA testing, samples must be collected by an approved professional to maintain a verified chain of custody.
How it works:
- We can arrange for a sample collector to visit:
- Your home
- Your workplace
- A solicitor’s office
- You can also attend an appointment at:
- Our laboratory in Deeside, North Wales
- An approved sample collector (such as a GP)
Before your appointment:
- Do not eat, drink, smoke, vape or chew gum for at least 30 minutes before taking your sample.
- Bring 2 passport-sized photographs for each person being tested, however, if this is not possible, a photo can be taken at the appointment.
Your samples and documents will then be securely sent to NorthGene™ by the sample collector.
Need help?
If you’re unsure about any step, our team is here to help:
📞 0191 233 1414
📧 northgene@biofortuna.com
