Vial duration

TB-500 vial duration calculator

Estimate how many weeks one 5 mg TB-500 vial covers at your dose and weekly cadence.

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Last updated: May 13, 2026

Vial (mg)

Dose (mg)

Doses / week

Total doses

Lasts

1.0 weeks

TB-500 weeks-of-supply at common cadences

How long one 5 mg TB-500 vial covers at a 2 mg per dose, for three weekly cadences. Total doses per vial: 2.

Doses per week	Total doses per vial	Weeks of supply
1	2	2.0
2	2	1.0
3	2	0.7

Math weeks-of-supply assumes every dose draws cleanly. Stability typically caps a reconstituted vial at 4–6 weeks of refrigerated use regardless of how much liquid remains.

Worked example

How long one TB-500 vial lasts, the long version

Total doses in the vial: floor(5 ÷ 2) = 2. The floor matters — a partial dose at the bottom doesn't count.
Cadence: 2 doses per week for TB-500 at this example step.
Math weeks-of-supply: 2 ÷ 2 = 1.0 weeks of liquid in the vial.
Stability ceiling: most reconstituted peptides are typically used within 4–6 weeks of refrigerated storage. Whichever number is smaller is the one that binds your refill date.
Doubling the dose roughly halves both numbers — and titration usually closes the gap between "math weeks" and "stability weeks" without you noticing.

Scenarios people actually run into

Three things that come up logging TB-500

Math says one 5 mg TB-500 vial covers 1.0 weeks at 2 mg per dose. Stability typically caps a reconstituted vial at 4–6 weeks. Whichever number is smaller is the date on your refill calendar.
Titration up doubles the dose and halves the vial. A 12-week-on-paper vial becomes a 6-week vial the day you step up — order the next vial the same day you take the step.
Shipping windows are the silent third constraint. If your supplier runs 1–3 weeks, the refill order has to leave at least that long before "math weeks" or "stability weeks," whichever is binding.

Same-category neighbor

TB-500 next to BPC-157

Both sit in the Healing bucket — here's the vial duration math side by side on each one's example vial.

	TB-500	BPC-157
Vial	5 mg	5 mg
Cadence	2/wk	7/wk
Weeks of supply	1.0	2.9

Want the full breakdown? BPC-157 reference →

TB-500 is a synthetic fragment of the natural protein Thymosin Beta-4 that people use to support recovery from soft-tissue and tendon injuries. It works by promoting cell migration and new blood-vessel formation at injury sites, which is what allows damaged tissue to rebuild faster. Animal studies show meaningful acceleration of wound and tendon healing; controlled human data is limited. This page covers reconstitution math and how people typically log a loading-then-maintenance schedule.

Planning TB-500 vials in real life

TB-500 is the heaviest mg-load healing peptide most users encounter. A 5 mg vial covers 2.5 doses at the 2 mg loading step or 1 dose at the 5 mg step. That means a 4-week loading protocol at 2 mg twice weekly burns through 4 vials. Anyone planning a TB-500 cycle should order vials in bulk for the loading phase rather than weekly.

Stability gives TB-500 a comfortable margin. The 4-6 week reconstituted vial window is much longer than any single TB-500 vial lasts at loading-phase doses, so you never hit the stability ceiling. The only refill question is shipping cadence. Maintenance phase (weekly 2 mg) stretches a vial to about 2 weeks, which lines up nicely with monthly refill orders.

Storage and shelf life for TB-500

For optimal stability, the unmixed, lyophilized form of TB-500 is stored under refrigeration away from light. After the peptide powder is reconstituted with a sterile diluent, the vial containing the solution should also be kept in a cold, dark environment like a refrigerator. Researchers typically plan to use the contents of the reconstituted vial within a defined timeframe, often several weeks, to minimize potential degradation of the peptide in solution.

How the TB-500 vial duration calculator works

A 5 mg TB-500 vial covers about 2.5 doses at the 2 mg step, twice weekly — roughly 1 week per vial during the loading phase. Maintenance phase typically drops to weekly, doubling vial life. Plan loading-phase refills around weekly cadence.

The formula is two divisions. Total doses per vial equals vial mg divided by dose mg, rounded down. Weeks of supply equals total doses divided by doses per week. With a 5 mg vial of TB-500, a 2 mg dose, and 2 dose per week, the vial covers 2 doses, or about 1.0 weeks of supply.

The three inputs that move the answer: vial mg (set when you bought the vial), dose mg (set by your protocol step), and doses-per-week (set by the peptide's half-life). Once a vial is reconstituted it also has a stability ceiling — most lyophilized peptides reconstituted in BAC water are typically used within four to six weeks of refrigerated storage, so a vial that mathematically lasts twelve weeks may not last twelve weeks in practice.

Common TB-500 vial-planning mistakes

Entering a 2.5 mg dose into a calculator field that defaults to micrograms (mcg), resulting in a miscalculation of several orders of magnitude.
Allowing a twice-weekly schedule to drift by a day each week, altering the dosing interval from a 3-day/4-day pattern to a 4-day/5-day pattern over time.
Using only 1 mL of diluent for a 10 mg vial and finding the resulting solution too concentrated to measure small dose adjustments precisely on a U-100 syringe.

Frequently asked questions about TB-500 vial duration

How does the TB-500 vial duration calculator estimate weeks of supply?

It floors total doses (vial mg ÷ dose mg) then divides by doses per week. For this TB-500 example — a 5 mg vial, 2 mg per dose, 2 dose/week — that's floor(5 ÷ 2) ÷ 2 = about 1.0 weeks. Flooring matters: a partial dose left in the vial doesn't count. Loading-phase TB-500 cycles use 4-6 vials over 4-6 weeks — order the full cycle in one shipment.

Should I plan refills around the math, or around stability?

Whichever runs out first. Math says TB-500 at the example dose lasts the calendar weeks shown above. Stability says most reconstituted peptides are typically used within 4–6 weeks of refrigerated storage regardless of how much liquid is left. If the math says 12 weeks but stability caps at 5, plan around 5 — and reconstitute the next vial with less water so you finish it in the stability window. Loading-phase TB-500 cycles use 4-6 vials over 4-6 weeks — order the full cycle in one shipment.

Does titrating the TB-500 dose up shorten vial life?

Yes, often dramatically. Doubling the dose halves the doses-per-vial. The calculator shows real-time how a step-up changes the weeks-of-supply line, so you can re-time refill orders before a titration event rather than discovering the gap mid-protocol. Loading-phase TB-500 cycles use 4-6 vials over 4-6 weeks — order the full cycle in one shipment.

What if I take TB-500 less often than the default cadence here?

Drop the doses-per-week field. With 2 dose/week the example vial lasts about 1.0 weeks; halving the cadence roughly doubles that, but you'll hit the stability ceiling first. A vial that mathematically covers 16 weeks rarely covers 16 weeks in practice. Loading-phase TB-500 cycles use 4-6 vials over 4-6 weeks — order the full cycle in one shipment.

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