The saliva collection kit includes a buffer solution that is added to your saliva immediately after you finish providing your sample. This solution stabilizes the DNA and prevents bacterial contamination.
Buffered samples are stable at a wide range of temperatures (-20ºC to 50ºC or -4ºF to 122ºF) for up to 6 months. Unused kits also remain stable even if exposed to temperatures in this range during transit or storage.