I keep all my annual labs, and IF the range comes in lower end, I'm aware. My potassium comes in lower end, so with the help of a friend who deals with CFS, we are up on getting more potassium going in. As long as we're in ranges, docs don't address anything. We have to be aware. She put me onto low sod V8, mix it with my MSM drink in the morning, use 1/2 distilled water, 1/2 V8 and the MSM which I use for joint pain.