Establish the biological truth of your family relationships with a professional sibling DNA test. When traditional paternity testing is not possible, comparing the genetic markers of siblings provides a definitive statistical answer. At Brashan DNA Services, we deliver precise, laboratory-backed results to resolve uncertainty and provide the clarity you require.
How does a sibling DNA test work?
A sibling DNA test identifies the amount of shared genetic material between two individuals. Full siblings share approximately 50% of their DNA, while half-siblings share roughly 25%. Our laboratory analyzes 20 to 25 specific genetic markers to calculate the "sibling index." This index determines the statistical likelihood of the claimed relationship.

How accurate is the laboratory process?
Our UKAS-accredited laboratory follows rigorous ISO 17025 standards to ensure technical precision. While sibling testing is probabilistic rather than a simple "yes/no," our processes achieve over 99% accuracy in marker identification. We strongly advise including a known parent’s sample whenever possible, as this significantly increases the certainty of the final result.

Why choose a peace-of-mind test?
Our home sibling DNA test kits are designed for personal knowledge and private resolution. These tests utilize the same clinical technology as our legal DNA testing but allow for discreet self-collection. Use this service to erase doubt regarding inheritance, family history, or biological connections without the need for court-mandated appointments.
How to get started?
Follow these direct steps to receive your results:
- Order your kit via our secure online shop or call +447360536054.
- Collect the samples using the provided sterile buccal swabs. Rub the swab firmly against the inside of the cheek for 30 seconds.
- Complete the consent forms for all participating parties. Ensure all details are legible and accurate.
- Post the samples back to our laboratory using the guaranteed special delivery envelope included in your kit.
- Receive your results via a secure, password-protected email within 3 to 5 working days of sample receipt.

For immediate assistance or to discuss a sensitive case, contact our expert team at +447360536054. We prioritize discretion and accuracy in every test we process.