Peptide Inventory Management: Track Vials, Expiry, and BAC Water Like a Pro

If you have ever had to skip a dose because a vial ran out at the wrong time, or wondered whether that BAC water is still good, this guide is for you. A little inventory hygiene goes a long way.

Why inventory management matters

Three scenarios that inventory tracking prevents:

1. Mid-protocol runout — You open a vial, use half, and forget how much remains
2. Expired BAC water — Bacteriostatic water is only good for 28 days after first puncture
3. Lot recall — A contaminated batch gets reported and you need to know which vials you used

What to track per vial

For each vial in your inventory:

Field	Why it matters
Compound	Which peptide or GLP-1
mg per vial	Starting mass — needed for dose math
BAC water added	The volume you reconstituted with
Lot number	Enables recall tracing
Expiry date	Use-by from manufacturer
Opened date	BAC water 28-day clock starts here
Cost (optional)	Track spending per protocol cycle

The 28-day BAC water rule

Multi-dose vials use bacteriostatic water, which contains 0.9% benzyl alcohol to inhibit bacterial growth. Once punctured:

• Viable for 28 days at 2–8°C
• After that, discard — even if the vial still has peptide left
• Mark the puncture date on the vial with a permanent marker

Reorder planning

A good rule of thumb: order your next vial when the current one reaches 25% remaining. This gives you a buffer for shipping delays.

If you track remaining doses in TrackPep, the app can show you at a glance how many doses you have left and whether your next order needs to arrive before they run out.

Audit your inventory monthly

Once a month, run through:

1. Check all expiry dates — discard anything expired
2. Check opened dates — discard BAC water older than 28 days
3. Update remaining dose estimates
4. Reorder anything running low

This takes 5 minutes and prevents nearly all supply-related protocol interruptions.

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Informational only. Always consult a licensed healthcare professional.