B12 shot tracker
Tirzing logs B12 in mcg, whether it comes in a vial of its own or mixed into another vial, and reminds you on the days you take it.
Free plan with no time limit and no card. Works in any browser, with an Android app.
What you can log for B12
B12 keeps its own unit and its own schedule, even when it shares a vial with something else.
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Kept in mcg
Vitamin B12 is in the quick-start list, set up in mcg. Shots are logged and counted down in mcg.
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Vials in either unit
Enter the vial’s strength in mcg per mL or mg per mL, whichever its label shows. The vial still counts down in mcg.
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B12 in another vial
If B12 is mixed into another vial, add that vial as a blend with B12 as one ingredient. The B12 from each shot is worked out from the same draw.
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Its own reminder
A separate schedule and reminder, so a B12 shot is never confused with anything else you take.
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An estimate from your own log Paid plans
A level curve built from the shots you logged and a half-life you can edit.
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Your history
Every B12 shot in one list, and a CSV download whenever you want it.
Items marked “Paid plans” come with a paid plan. The rest are included on the free plan. Compare plans
What it looks like in the app
A sketch of three things you see after logging, with made-up entries.
Setting up B12 in Tirzing
- Open Medications, choose Add medication, and pick Vitamin B12 from the quick-start list.
- Enter the schedule you follow.
- Add your vial under My supply, entering the strength in the unit printed on its label.
- Log each shot in mcg. If your B12 is mixed into another vial, add that vial as a blend instead.
Questions about tracking it
Can I log B12 in mcg?
Yes. B12 from the quick-start list is set up in mcg, and its shots and vials count down in mcg.
My vial label is in mg per mL. Can I still log mcg?
Yes. Enter the strength as printed and choose the unit the label uses. Tirzing converts it, and the vial counts down in mcg.
Can I track B12 that is mixed into my GLP-1 vial?
Yes. Add the vial as a blend with each ingredient from the label, and log each shot by the main one. The B12 from the same draw is worked out in mcg.
Does Tirzing tell me how much B12 to take?
No. Tirzing records what you were told to take and what you logged. It never suggests a dose.
Other trackers
- Lipo+, Lipo-C and MIC injection tracker One mix per vial, logged by the mL, with its own schedule and reminder.
- NAD+ injection tracker Each shot against its vial, on your own schedule, alone or in a blend.
- Compounded semaglutide tracker Vials with their label details, blends, beyond-use dates and a supply countdown.
- Peptide injection tracker Any injection by name, in mg, mcg or mL, with its own schedule, supply and reminders.
- All trackers
Free tools, no account needed
- Vial runway calculatorHow long a vial lasts at the amounts you enter.
- Cost per poundWhat you spend, divided by the pounds you have lost.
- Medication level calculatorA model of the shots you type in, drawn as a curve.
Start your log
Set your medication up once with the details from your own prescription and supply, and each shot after that is a few taps. The free plan has no time limit.