> There is a reason why metabolic values have "normal" ranges.

The "reason" is that they assumed a normal distribution and wanted to include 95% of people. If you're outside the normal range, you are abnormal. Which doesn't necessarily mean unhealthy or that something needs to be changed, but could potentially mean that questions should be asked to understand why you are outside the range? Maybe it's totally fine, like you are an athlete or have a particular kind of diet.