Some years ago – let’s say, for sure, some decades ago – a “good physician” was considered the one who would request a few laboratory tests to some patient and they would come out all altered. – Yes – one would say – he got it right to the point, disease concerning. However, in the 21st century, when we have moved the focus of preventive care from prevention of diseases to health maintenance, we believe that the “good physician” may be considered the one that aims at keeping all the test results basically normal. Actually, more than that: optimal. In fact, keeping the eyes on optimal test results is a major goal for Age Management practitioners. For that, even if we still have the established reference ranges, we’ve got to have our own interpretation of the tests we are used to from a different, more detailed standpoint than in the general practice. Some normal results must be seen as subnormal, which are, indeed, still different from abnormal. Some results may also be considered critical – that is, those ones which demand some urgent and immediate action.