In order to sequence your DNA, Helix needs something from you that has your DNA. Saliva is an easy source of DNA and it is painless to collect, unlike blood. 

The best way for us to obtain sufficient quantities of DNA for our analysis is through a saliva sample. Saliva samples offer a convenient and non-invasive method for DNA sample collection as compared to hair and blood samples. Cheek swab samples of DNA (as you may have seen on television programs or in movies) do not consistently give sufficient DNA yields for the testing that we conduct.

Neither Helix nor Insitome accepts other forms DNA sample (e.g. hair or blood).

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