Sibling DNA Testing from £199.00

£199 pom dna sibling test

Order a Sibling DNA test for £199.00 with next day results.

Today we can use DNA technology to establish whether or not a brother and a sister have the same father or the same father and mother.

AlphaBiolabs Sibling DNA testing has an accuracy rate of 100%. We ask for the inclusion of the mother’s DNA  samples in this testing procedure as this usually increases the accuracy rate. We use statistical analysis to evaluate the amount of DNA shared between the individuals tested to deduce a biological relationship. For example, full siblings usually have more DNA in common than half-siblings, while half siblings normally share more DNA than unrelated persons.

Our sibling DNA test requires the participation of two alleged siblings.

  • Sibling DNA Testing for your peace of mind
  • Just £199 for Next Day Results or £249 for Same Day Results
  • Winner of the Queen’s Award for Enterprise in Innovation 2016
  • 100% confidential service
  • Same working day results (The UK’s fastest DNA Sibling Test)
  • Sibling testing Kit sent to an address of your choice using discreet packaging
  • Our laboratory processes are UKAS accredited (Laboratory number 2773)*
  • All reports are emailed back and password protected for security
  • Trusted by ITV to provide DNA testing to The Jeremy Kyle Show
  • Guaranteed results or your money back
  • Price match: we will beat any UK-accredited laboratory test


We are fully accredited for DNA sibling testing using 24 markers, utilising the very latest DNA technology to ensure the reliability and accuracy of our genetic testing.

To ensure our quality AlphaBiolabs is a UKAS accredited testing laboratory No 2773. This means that an independent body checks our laboratory and results.

A guaranteed result or your money back

At AlphaBiolabs we understand that the reason you have ordered a DNA test is to get an answer. However, not all tests are conclusive, and therefore you may not get a decisive answer to your question.

It is the industry’s best kept secret that for most laboratories, sibling testing can be up to 40% inconclusive. This means that four people in every 10 do not get the result they have paid for.

At AlphaBiolabs award-winning DNA laboratory, we have been able to reduce the inconclusive rate down to 24%, meaning that one in four people do not get a definitive outcome.

This is still not acceptable at AlphaBiolabs and with this in mind we have launched our guaranteed result or your money back promise. For every customer utilising our service and not getting a conclusive result, we will refund the price of your test, guaranteed.

Why is this sibling DNA test different?

Unlike a paternity test which will always provide a conclusive result, sibling DNA testing is different. When a sibling test is conducted, the DNA laboratory will determine the genetic profiles of the alleged siblings.

Based on the genetic material shared by each sibling, a sibling DNA index or likelihood ratio is calculated to determine the most likely relationship.

A likelihood of greater than 10 supports that the tested individuals are related as siblings, either full or half; whereas a likelihood of less than 0.1 does not support this. 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.

The higher the value of the sibling DNA index, the greater the likelihood that the two individuals are true biological siblings. It is possible to analyse two individuals to determine that they are more likely to share only two common parents versus one common parent (i.e. They are full siblings sharing a mother and father) or that it is more likely that they have one parent in common versus them being unrelated (i.e. That they are half-siblings, with s single parent in common).

What is a Sibling?

  • Individuals are classed as full siblings when both biological parents are the same.
  • Half siblings are individuals who share only one biological parent, either the mother or the father.


Three Easy Steps to Home Sibling Testing

sibling testing steps

Our Sibling DNA Test costs From £199.00

AlphaBiolabs is a trusted name in the DNA, Drug and Alcohol testing community. We work on a daily basis with many law firms, county councils, businesses and members of the public. We have invested hundreds of thousands of pounds in our UK based laboratory to ensure that we have the equipment available to ensure that the sibling test is as accurate as possible

How to buy your DNA Sibling Test

You can buy your DNA Sibling test buy clicking the button below and buying securely online.

Buy your test securely online

Buy securely online – we use Sagepay direct to ensure that your payment details are 100% secure and we will never sell on your details to third party advertisers.

*Please note: Our sample collection service is not included in our scope of accreditation.