Sibling DNA Test
Sibling DNA Test

Sibling DNA Test

£149 + Free Shipping  Order Now

UP TO 45 LOCI ANALYSED
NEXT-DAY RESULTS AVAILABLE
100% ACCURATE
  • Just £149 for next day results
  • The UK’s fastest sibling DNA test
  • Award-winning UK laboratory: Queen’s Award for Enterprise in Innovation
  • Kit sent directly to your address in discreet, plain packaging
  • Over ONE MILLION genetic tests performed since 2004

All major debit and credit cards accepted, or…

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Four easy steps for your DNA sibling test

Buy your collection kit

Buy your collection kit

Collect your sample

Collect your cheek cell DNA samples

Post back to our UK laboratory

Post back to our laboratory

Receive your results by email

Receive your results by email

How do we do our sibling DNA testing?

From just £149, our Sibling DNA test can help you verify whether two or more individuals are full siblings or half siblings.

When two or more people have the same biological parents, they are classed as full siblings. Half siblings only share one biological parent – the mother or father.

For a sibling DNA test, cheek swabs are used to collect DNA samples from each sibling. For the most conclusive result, we also ask for the biological mother’s DNA sample, if available.

Once these samples arrive at the laboratory, our in-house geneticists analyse and compare the DNA samples to determine the genetic profile of the possible siblings and calculate a sibling DNA index or likelihood ratio.

  • A likelihood of greater than 10 supports that the tested individuals are either full or half siblings
  • A likelihood of less than 0.1 is not supportive, meaning the individuals are unlikely to be related
  • A likelihood which falls between 0.1 and 10 is considered inconclusive, which means a relationship cannot be determined based on the statistical probability obtained from the analysis

Order your Sibling DNA test online now and get the answers you need.

You can choose to receive next day* results (included in the cost of your test), or same day* results for an additional £70.

Please note that this test is for peace of mind only and is not admissible in court. If you require a DNA test for legal matters, you will need a legal DNA test.

*Working days from when your samples arrive at our laboratory, before 10am

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Sibling DNA Test

Over ONE MILLION genetic tests performed since 2004

How accurate is a sibling DNA test?

Our Sibling DNA test results are 100% accurate and reliable based on the samples we receive at our laboratory.

We are also accredited to the international quality standard ISO 17025 for our DNA testing.

Why choose AlphaBiolabs for your sibling DNA test?

Here are just a few reasons to choose AlphaBiolabs for your sibling DNA test:

  • Only cheek swabs required from each sibling and the biological mother, if possible
  • Next day results as standard, or upgrade to same day results for +£70
  • Up to 45 DNA markers analysed – double the industry standard
  • The only UK laboratory to perform all our DNA testing in-house – so your samples will never be sent abroad
  • Test kit sent directly to your preferred address in discreet, plain packaging
  • Over ONE MILLION genetic tests performed since 2004
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DNA

UK’s fastest sibling DNA test

How can I get a sibling DNA test?

We’ve done everything we can to make the sibling DNA testing process as simple as possible.

  1. Order your test online
  2. Follow the instructions enclosed in your test kit to collect your DNA samples and return them to our laboratory
  3. Receive your secure, confidential results via email
Sibling test
DNA testing kit

Enclosed in the home Sibling DNA test kit:

  • Peace of mind DNA test instruction sheet
  • A self-addressed envelope to send your DNA test samples back to us
  • Three DNA sample collection swab packages containing two swabs in each package.
  • Individual DNA test sample envelopes

If you want to test more than two siblings, you can add extra people to the package when ordering and more swabs will also be provided in the test kit (additional charges apply).

Your test kit will be sent directly to your preferred address in discreet, plain packaging, for full confidentiality.

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All testing performed at our award-winning UK laboratory

Frequently Asked Questions

For a sibling DNA test, cheek swabs are used to collect DNA samples from each sibling and the biological mother, if available. 

Once these samples arrive at the laboratory, our in-house geneticists analyse and compare the DNA samples to determine the genetic profile of the possible siblings and calculate a sibling DNA index or likelihood ratio.

  • A likelihood of greater than 10 supports that the tested individuals are either full or half siblings
  • A likelihood of less than 0.1 is not supportive, meaning the individuals are unlikely to be related
  • A likelihood which falls between 0.1 and 10 is considered inconclusive, which means a relationship cannot be determined based on the statistical probability obtained from the analysis

Our standard sibling test is already industry-leading, as it analyses 25 DNA markers (the industry standard only analyses 16-21 markers).

What makes AlphaBiolabs unique is that we can also analyse up to 45 DNA markers. This allows more genetic material to be analysed, which strengthens the result and provides additional reassurance.

This is ideal for customers who want the most powerful DNA test available.

Our Sibling DNA test results are 100% accurate and reliable based on the samples we receive at our laboratory.

We are also accredited to the international quality standard ISO 17025 for our DNA testing.

Yes, the Sibling DNA test can be used to determine whether individuals are half siblings.

Half siblings share one biological parent – the mother or father – and will normally share more DNA than people who are not related.

This makes it possible to use sibling DNA testing to determine whether individuals are:

  • more likely to share one common parent (i.e. they are half siblings, with one biological parent in common) or
  • are more likely to be unrelated

A sibling DNA test requires cheek cell DNA to be collected from each sibling using cheek swabs.

We also ask that the biological mother’s DNA sample be provided where possible, for the most conclusive result. However, we can still perform the test without the mother’s sample.

Your DNA test kit will contain enough cheek swabs to collect DNA samples from two siblings and the biological mother (if available), along with full instructions on how to collect your cheek cell DNA samples and return them to our laboratory.

You can also choose to add a third sibling to the test for an additional £49, and more cheek swabs will be provided in the test kit.

For the most conclusive result, we do ask that the biological mother also provides a cheek swab sample, if possible.

However, this is not essential, and we can still perform a sibling DNA test without the mother’s sample. 

Your test kit will contain enough cheek swabs to collect DNA from two siblings and the biological mother (if available).

Yes, you can choose to send a test kit to a second address, for an additional fee.

Simply choose this option when placing your order.

Once your DNA samples arrive at our laboratory, testing can begin.

You can choose to receive your results the next day* (included in the cost of your test), or the same day* for an additional £70.

Simply choose your preferred option when placing your order.

*Working days from when your samples arrive at the laboratory, before 10am

You can order an AlphaBiolabs Sibling DNA test for £149. The cost of the test includes all fees for laboratory testing and analysis. 

This includes DNA testing for two siblings, and Royal Mail First Class shipping for your test kit. 

You can choose to add a third sibling to the test for an additional £49.

We also provide additional shipping options for your test kit, including Next Working Day Courier (+£9.95).

You can order your Sibling DNA test here for just £149.

Your test kit will be shipped out to you immediately in discreet, plain packaging.

Need advice on whether this test is right for you? Call our friendly and knowledgeable Customer Services team on 0333 600 1300 or email info@alphabiolabs.com.

Our Sibling DNA testing kit includes full instructions on how to collect your cheek swab samples, DNA swab packages, swab envelopes, individual DNA test sample envelopes, and a self-addressed envelope to send your test samples back to us.

Your test kit will be sent out in discreet, plain packaging for full confidentiality.

Read reviews from real customers

Was referred from a friend to this company. Couldn’t fault the service and results were on time as stated. Thank you for your service!! I will be spreading the word about this amazing company

Sibling DNA Test customer
on DNA Testing Choice

I recently used Alphabiolabs to carry out a unique DNA sibling test with my brother who tragically passed away. The support, guidance and service I received was amazing. It was a very sensitive case and I felt the staff handled it very professionally. Thanks to a lady called Carolyn I would recommend Alphabiolabs to anyone. Thank you so much to you all for helping me achieve what I needed. Peace.

Sarah
on Trustpilot

Staff at alphabiolabs was really helpful throughout my sticky situation but they dealt with it in a confident and professional manner throughout keeping me and my family calm and collected. We got the results on time, worth every penny.

Sibling DNA Test customer
on DNA Testing Choice

Buy the fastest, most accurate Sibling DNA test here

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