There are many different blood tests that all have different “reference ranges”. However, it is important to understand how those reference ranges are determined. For purposes of serum testosterone reference ranges, the “norms” are not age-adjusted, in other words, men ages 18-80 are thrown in to the same patient population, thus a wide spectrum from 250-1100 is now considered “normal”. However, it is our belief that a 20 year old should not have the same testosterone level as an average 70 year old and be considered in the range of “normal” or “low normal”. Multiple studies have demonstrated that testosterone levels should not be expected to drop significantly just due to aging. Thus, for those men with Low-T symptoms who have what some consider “borderline levels” treatment with testosterone is often clinically supported and recommended.