How can I improve saliva generation for my DNA test?

Saliva flow can be stimulated with a few grains of table sugar, or any other saliva-stimulatory substance that does not interfere with DNA stability or subsequent amplification.

You can also try the following:

1. Gently rub back and forth under your chin;

2. Hold or rub your tongue to the roof of your mouth;

3. Smelling or imagining sour foods such as lemons.