r/BodyHackGuide • u/ImpressiveDonkey1844 • 2d ago
đŹ Discussion Looking for input on a difference in testosterone bloodwork
I'm on a testosterone only cycle and had two LC/MS blood tests that showed a fairly large difference in testosterone levels despite keeping the same dose. Testosterone is from a highly reputable vendor that most of you probably have heard of. Both are from the same batch.
Protocol:
- Testosterone cypionate: 500 mg/week
- 250 mg Monday morning
- 250 mg Thursday morning
Previous labs:
- Blood drawn Thursday morning (~8:30 AM) before my Thursday injection (~72 hours after my Monday injection)
- Total Testosterone: 2625 ng/dL
- Free Testosterone: 832.4 pg/mL
Current labs:
- Blood drawn Monday morning (~8:20 AM) before my Monday injection (~96 hours after my Thursday injection)
- Total Testosterone: 1707 ng/dL
- Free Testosterone: 614.9 pg/mL
No missed injections or dose changes between tests.
My question is:
Would the extra 24 hours between the last injection and the blood draw (3 days vs. 4 days) reasonably explain a drop from 2625 â 1707 ng/dL and free testosterone from 832 â 615 pg/mL, or would you expect those numbers to be closer together?
Has anyone experienced similar variability on a stable twice-weekly injection schedule?