Is there an official NAD+ injection frequency?

No. NAD+ has no FDA-approved injectable label, so no regulatory body has set a required frequency. Frequency figures in research write-ups vary by protocol.

Does NAD+ injection frequency change the reconstitution math?

No. Frequency determines how many draws come out of a vial over time. Concentration is fixed once, at reconstitution, by vial mass divided by water volume, and stays constant regardless of how often a draw is taken.

How do I work out how long an NAD+ vial will last at a given frequency?

Divide the vial's total mg by the target dose to get doses per vial, then divide that by how often a draw is taken. A 500 mg vial dosed at 50 mg holds 10 doses — 10 days at once daily, or 20 days at every other day.

Does a higher NAD+ injection frequency mean a smaller dose?

Not necessarily. Frequency and dose size are separate variables in a research protocol. A protocol can pair a higher frequency with a smaller per-draw dose, or hold the dose steady and draw down the vial faster instead.

NAD+ Injection Frequency: What Actually Sets It

By PeptCalc Research — Medically reviewed by David Mansour, MD — Last reviewed August 22, 2026

NAD+ injection frequency is not something a drug label specifies, because NAD+ has no approved injectable label to specify it. That leaves NAD+ in the same position as most research peptides: frequency is a protocol detail, not a number handed down from regulatory review. This reference explains what actually determines NAD+ injection frequency, and — more usefully — how frequency interacts with the reconstitution math that decides how long a vial actually lasts. It is written for research and educational purposes only and is not medical advice.

No approved label sets a fixed schedule

Some compounds carry an FDA-approved formulation with a specific labeled schedule; tesamorelin, for example, has an approved once-daily label for its narrow indication, indexed on DailyMed (NIH/NLM). NAD+ has no equivalent approved injectable drug label. It is sold as a research compound, not an approved therapy, so there is no single "correct" NAD+ injection frequency the way there is for a handful of approved drugs — only frequencies that appear across different research write-ups, which vary from source to source.

That absence of a fixed standard matches how NAD+ is treated elsewhere on this site: there's no official required water volume for reconstitution either, only reference concentrations chosen because they read cleanly on a syringe (see the NAD+ injection dosage calculator guide). Frequency works the same way — set by whoever designed the specific research protocol, not by a label.

What frequency actually controls

Frequency answers one question: how many draws come out of the vial per period. It does not answer a separate question: what is the concentration of what's in the vial. That second question is fixed the moment bacteriostatic water is added:

Concentration = vial mass (mg) ÷ water added (mL)

A vial reconstituted to a given concentration stays at that concentration through every draw, whether the schedule calls for one draw a day or one draw a week. Frequency and concentration are independent variables that combine into a third, more practical number: how many days a single vial actually covers.

Worked example: vial life at two frequencies

Take a 500 mg NAD+ vial reconstituted with 5 mL of bacteriostatic water, at a 50 mg target dose per draw — the same reference setup used in the NAD+ injection dosage calculator.

Step 1 — concentration. 500 mg ÷ 5 mL = 100 mg/mL.

Step 2 — volume per dose. 50 mg ÷ 100 mg/mL = 0.5 mL.

Step 3 — syringe units. On a U-100 insulin syringe, 1 mL = 100 units, so 0.5 mL × 100 = 50 units per draw.

Step 4 — doses per vial. 500 mg ÷ 50 mg = 10 doses. This number depends only on vial mass and dose size — the water volume chosen in Step 1 doesn't change it.

Step 5 — vial life by frequency. At once daily, 10 doses run 10 days, about 1.4 weeks. At every other day, the same 10 doses stretch to 10 × 2 = 20 days, about 2.9 weeks. Neither frequency is a recommendation — they're two illustrative points showing how the same vial and dose produce different vial-life numbers depending on how often it's drawn.

A 1000 mg vial follows the identical formula at double the total. Reconstituted with the same 5 mL of water, it works out to 1000 ÷ 5 = 200 mg/mL, so the same 50 mg dose becomes 50 ÷ 200 = 0.25 mL, or 25 units — a smaller draw from a higher-concentration vial. That vial holds 1000 ÷ 50 = 20 doses: 20 days at once daily, 40 days (about 5.7 weeks) at every other day.

Vial size	Water added	Concentration	50 mg dose (units)	Doses per vial	Vial life — once daily	Vial life — every other day
500 mg	5 mL	100 mg/mL	50 units	10	10 days (~1.4 weeks)	20 days (~2.9 weeks)
1000 mg	5 mL	200 mg/mL	25 units	20	20 days (~2.9 weeks)	40 days (~5.7 weeks)

Frequency and dose size are separate decisions

It's easy to assume a higher NAD+ injection frequency automatically means a smaller per-draw dose, since that pattern shows up in some protocols. The arithmetic doesn't require it. A protocol can hold the dose steady and simply draw from the vial more often — which draws it down faster and shortens vial life — or it can lower the dose to stretch the same vial across more frequent draws. Frequency, dose size, and vial life are three separate numbers connected by the doses-per-vial formula above; changing one doesn't automatically change another unless the protocol is designed that way.

Why research protocols on frequency disagree

Because there's no approved label to converge around, published and self-reported NAD+ protocols describe a range of schedules rather than one standard. Some describe daily draws; others space them further apart. Human trial data on injected or infused NAD+ is still earlier-stage than the compound's broader popularity might suggest, and that thin evidence base is part of why frequency varies so much between sources — there's no large body of controlled human dosing trials for protocols to converge around. This guide does not recommend a frequency or take a position on which protocol is better. What the math above can tell you is how any given frequency plays out against a specific vial size, water volume, and dose once one has been chosen.

Keeping frequency and concentration from drifting apart

A frequency-based vial-life estimate is only accurate if the concentration behind it hasn't changed. Track the date a vial was reconstituted, not just when it was opened — see how to store reconstituted peptides for the general reasoning, which applies to NAD+ the same as any other lyophilized compound. If a vial that should supply 10 doses at 100 mg/mL runs out sooner than the frequency and dose size predict, the concentration used in the original calculation is the more likely source of the mismatch, not the compound itself.

Common mistakes

Looking for an official NAD+ injection frequency. No approved label sets one — treat any specific number as a protocol detail, not a standard.
Assuming frequency changes concentration. It doesn't. Concentration is fixed at reconstitution; frequency only affects how fast the vial's total mg gets drawn down.
Applying peptide-scale intuitions to NAD+. NAD+ research doses run in the tens to hundreds of milligrams, not micrograms, so a frequency-driven vial-life estimate needs NAD+-scale numbers, not numbers borrowed from a microgram-dosed peptide.
Reusing a vial-life estimate after changing the water volume or dose. The 10-day and 20-day figures above only hold at 100 mg/mL and a 50 mg dose. Change either input and the vial-life number changes with it.

Use the calculator

Enter an NAD+ vial size, bacteriostatic water volume, and target dose into the free peptide calculator to get the exact concentration, draw volume, and syringe units, then apply an intended frequency to the doses-per-vial figure to estimate vial life. For the full reconstitution math and reference concentrations, see the NAD+ injection dosage calculator guide.