Helix uses a unique process called "Next Gen Sequencing" to decode a portion of your DNA called the Exome.
The Exome contains up to 30 million "base pairs" of your DNA. There are around 3 billion base pairs in your entire genome. The Exome focuses on the "protein coding regions" which are the areas of the genome which are known to have the most impact on how you develop.
Your saliva is processed to extract DNA from the cells it contains.