Guides
TRT and injection guides
Plain answers to the questions that come up when you inject: schedules, sites, vials and lab results.
Guide
TRT injection schedules: weekly vs twice weekly vs daily
How often you inject changes the peaks and dips, not the average: weekly, twice-weekly, every-other-day and daily testosterone injections compared, with numbers.
Guide
How long does a 10 mL vial of testosterone last?
A table for 200 and 250 mg/mL vials at common weekly doses, how to work it out for yours, and why you should plan for a little less.
Guide
Subcutaneous vs intramuscular testosterone injections
What changes between subQ and IM testosterone: needles, volume, sites, what the research shows about levels, and how to switch with your prescriber.
Guide
What to do when a lab test shows your vial is under or overdosed
How to keep the same mg dose when a vial tests stronger or weaker than its label, what to check first, and how to correct your records.