Testosterone Blood Test Results Appear To Be Lab Dependent

[alperk]

My prior post had my testosterone blood test result increase from undetectable to 45. In reviewing the data I note that my Mass lab reported <0.5 ng/dL on 10/5/21 and my Florida lab reported 31 ng/dL the following week. Now I see that the undetectable values come from Mass where Florida is 30-45, significantly higher. I loved the undetectable results but what to believe ???

[Tall_Allen]

It is also highly variable over time, by time of day, and if the last Lupron shot is wearing off. Just stick to the same lab at the same time of day.

[alperk in reply to Tall_Allen]

Always good to get your perspective. Thanks

[dac500]

I always do blood tests at the same lab and at the same time of the day.

[London441]

Same lab and same time of day yes, but with the understanding that even then it can vary a fair amount.