Why do testosterone lab results and reference ranges differ between testing companies?
Got blood work done at a different lab than usual and noticed the total T numbers and reference ranges looked completely different. How can I accurately compare them?
Different laboratories use distinct testing methods, assays, and reference populations to establish what is considered a normal testosterone range, which can cause noticeable variations in reported numbers. Additionally, factors like the time of day the blood was drawn and natural daily fluctuations can further impact your results. Because of these differences, it is best to stick with the same testing provider when tracking changes over time to ensure consistency. You should discuss your specific lab reports and any discrepancies with your prescriber or Heyday clinician to properly interpret your trends.
Read our full guide →Every body is different. A licensed provider can look at your own labs and symptoms.
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