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Genetic Imputation
UNDERSTANDING DATA IMPUTATION
What is Genetic Imputation?
Most DNA tests don’t read every letter in your genome. Instead, they examine a small but informative sample — usually about 500,000 to 700,000 genetic markers out of the billions that make up your DNA.
That leaves many gaps in the data.
Genetic imputation is a scientific method used to fill in those gaps. It uses advanced computer models, large genetic reference databases, and patterns found in human populations to predict additional genetic variants that were not directly tested.
In simple terms, the computer looks at the DNA markers that were measured and uses known patterns of inheritance to infer the ones that are likely present nearby.
A Simple Way to Think About It
Imagine trying to read a word where a few letters are missing:
T E C _ N O L _ G Y
Even with two letters missing, you can easily recognize the word "technology."
Your DNA works in a similar way. Genetic markers are often inherited together in predictable patterns, so if we know part of the sequence, computers can accurately estimate the rest.
Why Imputation Is Useful
Because of genetic imputation, a DNA test that originally measured a few hundred thousand markers can be expanded to analyze tens of millions of genetic variants without needing full genome sequencing.
This gives researchers and clinicians a more detailed view of genetic pathways that may influence health.
How Accurate Is It?
When applied correctly and using high-quality reference data, genetic imputation is very accurate for common genetic variants, often reaching about 99% accuracy or higher.
Rare genetic variants are harder to predict, so those are interpreted more cautiously, or may require more testing to confirm its presence.
Why This Matters for Personalized Health
By expanding the number of genetic variants that can be analyzed, imputation helps provide a more complete picture of how your body may process nutrients, manage stress, regulate neurotransmitters, and respond to environmental factors.
It allows your genetic information to be interpreted with greater precision — helping guide more individualized health strategies.
If you are concerned about having a rare variant, you may find that whole genome testing (WGS) is worth the extra expense. Feel free to contact us if you have questions about what type of testing to use.