Hi, Dreambirdie, I bought a potassium meter, which I calibrate daily with provided solutions. The company provides simple directions online for using the meter for saliva testing, and they have a chart I downloaded, giving the equivalencies between salivary readings and blood results. Since my potassium ran low before starting methylation, and since methylation can cause sudden potassium drops, I decided to keep a close eye on my levels. I think it's wonderful that you can do this instinctively. Unfortunately, that didn't help me, so I'm back to working this like a puzzle.