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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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Total doses

2

Lasts

2.0 weeks

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.

How the NAD+ vial duration calculator works

This calculator answers the inventory question: at your current dose and weekly cadence, how many weeks will this NAD+ vial last? It is the math you need to plan refills before a vial runs dry mid-protocol — especially with peptides like GLP-1s where shipping windows can run several weeks.

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.

Use this calculator before opening a new vial to confirm the dose and cadence you have planned will not strand you halfway through. Use it again whenever you titrate up — a dose increase shortens vial life, sometimes dramatically. The calculator is intentionally conservative: it floors total doses, never assumes partial-dose draws, and never extends weeks beyond what whole doses support.

NAD+ cadence and how it changes vial life

Cadence and dose magnitude vary so much between users that recording the cadence explicitly in each log entry is essential. Without it, retrospective trend analysis is unreliable.

Many NAD+ users alternate between intensive loading periods and lower-frequency maintenance. Recording the transition between phases — the same way it is done for Melanotan-2 — keeps the timeline auditable.

Research protocols for subcutaneous NAD+ administration sometimes describe distinct phases for loading and maintenance. A loading phase might involve a higher frequency of administration, such as daily doses over a period of 5 to 14 days. The objective of such a phase in a research context is to rapidly alter the systemic concentration of the molecule. Following this initial period, the protocol might shift to a maintenance phase, characterized by a reduced frequency, such as a single administration per week. This two-phase structure requires diligent scheduling and tracking to accurately document the shift in dose timing and to monitor observations across both distinct periods of the protocol.

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.

Tracking NAD+ vials in a real log

NAD+ is unusual in this list because the cadence is so variable. The dose log itself is the source of truth for what protocol was actually followed; without it, retrospective analysis is essentially guesswork.

Documenting NAD+ administration requires careful attention to the route, as a key differentiator in study protocols is intravenous (IV) versus subcutaneous (SubQ) delivery. IV infusions are typically observed in clinical or research settings, involving large quantities such as 250 mg, 500 mg, or even 1000 mg, infused directly into the bloodstream over several hours. Tracking for this route should include the total dose, infusion duration, and any observed parameters. In contrast, subcutaneous self-administration involves logging much smaller doses (e.g., 50 mg) on a more frequent schedule. A comprehensive tracking log allows for clear delineation between these two methods, ensuring that the recorded data accurately reflects the significant difference in dose magnitude and delivery pharmacokinetics.

Common NAD+ vial-planning mistakes

  • Drifting from a planned cadence and not recording the change in real time.
  • Trying to fit a 50 mg dose into a single insulin-syringe draw without re-running the math.
  • Reusing a unit count from a previous vial without re-checking diluent volume.
  • Letting reconstituted NAD+ warm to room temperature on travel days.
  • Not writing the reconstitution date on the vial.
  • Failing to distinguish between NAD+ and its precursors, such as NMN and NR, when recording data, leading to an inaccurate log of which molecule is being observed.
  • Miscalculating the dose volume and not planning for the need for multiple insulin syringes or a single larger syringe to administer the full calculated amount.
  • Confusing the dosing frequency and amount from a loading phase with that of a long-term maintenance phase when scheduling and documenting protocol adherence.

Frequently asked questions about NAD+ vial duration

Is NAD+ a peptide?
Technically no — it is a coenzyme, not a peptide. It is included on this site because it is tracked using the same lyophilized-vial workflow as the peptides, and the same calculators apply.
How is NAD+ reconstituted?
Add a measured volume of bacteriostatic water through the rubber stopper and swirl gently until the powder fully dissolves. A 100 mg vial with 5 mL of BAC water gives a concentration of 20 mg per mL.
How many units of NAD+ are in 50 mg?
On a 100 mg vial reconstituted with 5 mL of bacteriostatic water (20 mg per mL), 50 mg is exactly 2.5 mL or 250 units. That is too large for a single 1 mL insulin syringe and is typically split or delivered with a larger syringe.
Is NAD+ dosed weekly?
Cadence varies enormously between users — weekly, twice-weekly, and intensive loading protocols all appear in personal logs. Recording the cadence explicitly in each entry is essential.
How long does a 100 mg NAD+ vial last?
At a 50 mg weekly dose, a 100 mg vial provides 2 doses — about 2 weeks of supply. The vial duration calculator runs the math for any combination of vial size, dose, and frequency.
Does NAD+ need to be refrigerated?
Lyophilized powder is typically stored refrigerated, and the reconstituted vial is kept refrigerated and used within several weeks.
What is the difference between NAD+, NMN, and NR?
NAD+ is the final, active coenzyme used by cells. NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside) are precursor molecules. In the body's natural pathways, NR is converted to NMN, and NMN is then converted to NAD+. Protocols that involve the administration of NAD+ directly are designed to bypass these conversion steps. When you log your activities, it is critical to specify which of these three distinct molecules you are tracking.
Why are the doses for IV infusion and subcutaneous injection so different?
The two routes of administration are studied with different objectives and kinetics. IV infusions deliver a very large dose (e.g., 500 mg) directly into the bloodstream over a period of hours. Subcutaneous injections involve a much smaller dose (e.g., 50 mg) that is absorbed more slowly from the tissue beneath the skin. Due to this order-of-magnitude difference in dosage and delivery method, it is essential that your tracking log clearly records both the dose and the specific route of administration.
Should I use reconstituted lyophilized powder or a pre-mixed solution?
NAD+ can be supplied in two primary forms. The first is as a lyophilized (freeze-dried) powder, which must be reconstituted with a sterile diluent, such as bacteriostatic water, before it can be used; this process should be carefully documented. The second form is a pre-mixed, chemically stabilized solution that does not require reconstitution. Either form can be studied, but your personal log should accurately document the specific product form you are using, as storage and handling may differ.
Why is the injection volume for subcutaneous NAD+ often so large?
The large volume is a direct result of the molecule's properties and the resulting concentration after reconstitution. For example, dissolving a 100 mg vial with 5 mL of diluent creates a 20 mg/mL solution. To administer a 50 mg illustrative dose from such a vial, a volume of 2.5 mL is required. This is significantly larger than the volume for many peptides and exceeds the capacity of a standard 1 mL insulin syringe, necessitating careful planning for dose administration.

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