Does time of blood test matter when on TRT

[tmaxey1]

So they typically want you to get T levels checked first thing in the morning.
If you are already on testosterone injections and HCG does the time of day even matter?

 

[Nelson Vergel]

It does not matter if you are on TRT. If you were not, fasting is best since breakfast can decrease T temporarily by 20% due to the insulin spike.

 

[Vince Carter]

It does not matter if you are on TRT. If you were not, fasting is best since breakfast can decrease T temporarily by 20% due to the insulin spike.

I haven't heard you say this before...did you mean prior to the next injection, in the trough? Or am I just dense tonite?

 

[Nelson Vergel]

If someone injects more than once per week, I really think it does not matter what day you get your blood drawn. But if you are anal about, I would say right before the next injection.

 

[tmaxey1]

It does not matter if you are on TRT. If you were not, fasting is best since breakfast can decrease T temporarily by 20% due to the insulin spike.

I’ve read that drinking a glucose beverage can reduce testosterone levels by up to 40% 60 minutes before a blood test. So would this insulin spike have the same effect for a person injecting testosterone or does this insulin only effect testicular testosterone production? Are spikes in insulin affecting injected blood test levels?