Vial duration

NAD+ vial duration calculator

Estimate how many weeks one 100 mg NAD+ 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

2.0 weeks

NAD+ weeks-of-supply at common cadences

How long one 100 mg NAD+ vial covers at a 50 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
1	2	2.0
2	2	1.0

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 NAD+ vial lasts, the long version

Total doses in the vial: floor(100 ÷ 50) = 2. The floor matters — a partial dose at the bottom doesn't count.
Cadence: 1 dose per week for NAD+ at this example step.
Math weeks-of-supply: 2 ÷ 1 = 2.0 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 NAD+

Math says one 100 mg NAD+ vial covers 2.0 weeks at 50 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

NAD+ next to MOTS-c

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

	NAD+	MOTS-c
Vial	100 mg	10 mg
Cadence	1/wk	3/wk
Weeks of supply	2.0	0.7

Want the full breakdown? MOTS-c reference →

NAD+ is a coenzyme every cell uses to convert food into energy, and people inject it to push back against the natural age-related drop in NAD+ levels. Most users report it for energy, mental clarity, and recovery; researchers also study it for DNA-repair and metabolic-aging pathways. Human studies confirm injections raise blood NAD+ levels meaningfully, though long-term outcome data is still developing. This page covers reconstitution math and typical daily-or-cycle logging cadence.

Planning NAD+ vials in real life

NAD+ is unusual in this catalog because the doses are so large (50-100 mg). A 100 mg vial covers 2 doses at 50 mg — that's 2 weeks of supply at weekly cadence, finished well inside the stability window. At twice-weekly cadence the same vial covers 1 week. Either way, vial life is shorter than stability.

The bigger planning concern with NAD+ is syringe size, not vial life. A 50 mg dose at 20 mg/mL is 2.5 mL — bigger than a 1 mL insulin syringe holds. Most NAD+ users work with 3 mL or 5 mL syringes and measure in mL rather than units. Vial planning is straightforward: 2 vials per month at weekly cadence, 4 at twice-weekly.

Storage and shelf life for NAD+

Lyophilized NAD+ powder is typically stored refrigerated until reconstitution. The in-use reconstituted vial is kept refrigerated and used within several weeks.

How the NAD+ vial duration calculator works

A 100 mg NAD+ vial covers 2 doses at the 50 mg step — one vial every 2 weeks at weekly cadence. Stability gives a comfortable margin because vials empty fast at NAD+ dose sizes. Plan ~2 vials per month at standard weekly use.

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 100 mg vial of NAD+, a 50 mg dose, and 1 dose per week, the vial covers 2 doses, or about 2.0 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 NAD+ vial-planning mistakes

Reusing a unit count from a previous vial without re-checking diluent volume.
Not writing the reconstitution date on the vial.

Frequently asked questions about NAD+ vial duration

How does the NAD+ vial duration calculator estimate weeks of supply?

It floors total doses (vial mg ÷ dose mg) then divides by doses per week. For this NAD+ example — a 100 mg vial, 50 mg per dose, 1 dose/week — that's floor(100 ÷ 50) ÷ 1 = about 2.0 weeks. Flooring matters: a partial dose left in the vial doesn't count. NAD+ at weekly 50 mg uses ~2 vials per month — straightforward monthly refill cadence.

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

Whichever runs out first. Math says NAD+ 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. NAD+ at weekly 50 mg uses ~2 vials per month — straightforward monthly refill cadence.

Does titrating the NAD+ 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. NAD+ at weekly 50 mg uses ~2 vials per month — straightforward monthly refill cadence.

What if I take NAD+ less often than the default cadence here?

Drop the doses-per-week field. With 1 dose/week the example vial lasts about 2.0 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. NAD+ at weekly 50 mg uses ~2 vials per month — straightforward monthly refill cadence.

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