How many units is 50 mg of NAD+?

It depends entirely on how much water you added. In a 500 mg vial reconstituted with 2 mL, the concentration is 250 mg/mL, so 50 mg is 0.2 mL, which is 20 units on a U-100 insulin syringe. In the same vial with 1 mL of water it is 10 units, and with 3 mL it is 30 units.

How much bacteriostatic water for a 500 mg NAD+ vial?

2 mL is the usual choice. It gives 250 mg/mL, which puts the commonly reported range of 25 mg to 200 mg between roughly 10 and 80 units. Aim for a draw between about 10 and 50 units, where the barrel is easiest to read, and add or remove water to get there.

How many doses are in a 500 mg vial?

Divide 500 by your dose. At 50 mg that is 10 doses, which at once daily is 10 days.

How many units is 100 mg of NAD+?

In a 500 mg vial with 2 mL of water, 40 units on a U-100 syringe. In a 1,000 mg vial with 5 mL, 50 units.

NAD+ dosage calculator

In a 500 mg vial with 2 mL of water (250 mg/mL), 50 mg of NAD+ is 20 units on a U-100 insulin syringe. NAD+ is sold in 100 to 1,000 mg vials and dosed in tens of milligrams, so the numbers look nothing like a peptide.

Reviewed 3 September 2026
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25 printable pages: dosing cards for the twelve most-used compounds at three water volumes, titration planners, a vial log, and five pages on what to do when it has already gone wrong.

Dose to units at the usual vial and water

Dose	U-100 units	Draw	Doses per vial	Vial lasts
25 mg	10 units	0.1 mL	20	20 days
50 mg	20 units	0.2 mL	10	10 days
75 mg	30 units	0.3 mL	6	6 days
100 mg	40 units	0.4 mL	5	5 days
150 mg	60 units	0.6 mL	3	3 days
200 mg	80 units	0.8 mL	2	2 days

500 mg vial in 2 mL of bacteriostatic water (250 mg/mL), U-100 insulin syringe, once daily.

About NAD+

NAD+ is a coenzyme, not a peptide, but it is sold by the same vendors as a lyophilised powder for subcutaneous injection and the arithmetic is identical. It is not an approved injectable medicine. Flushing, nausea and injection-site pain are widely reported, and the pain is dose- and concentration-dependent.

A 500 mg vial with 2 mL of water is 250 mg/mL, so 50 mg is 0.2 mL, or 20 units. Because the site pain tracks concentration, some people reconstitute with more water and accept a larger draw. Commonly reported doses are 50 to 100 mg, daily or a few times a week, often starting lower.

The same 500 mg vial at other water volumes

If the draw is awkward to read, change the water, not the dose. The dose stays the same; only the mark moves.

Vial	BAC water	Concentration	Draw	U-100 units	Doses/vial
500 mg	1 mL	500 mg/mL	0.1 mL	10 units	10
500 mg	2 mL	250 mg/mL	0.2 mL	20 units	10
500 mg	3 mL	166.67 mg/mL	0.3 mL	30 units	10
1000 mg	1 mL	1000 mg/mL	0.05 mL	5 units	20
1000 mg	2 mL	500 mg/mL	0.1 mL	10 units	20
1000 mg	3 mL	333.33 mg/mL	0.15 mL	15 units	20

All rows above assume a 50 mg dose and a standard U-100 insulin syringe, where 100 units = 1 mL.

How long it lasts in the body

Cleared within minutes to hours; the injected molecule itself is not what persists. A decay curve is only drawn where a human half-life is documented, so there is none here. Treat any precise figure for NAD+ elsewhere with caution.

Common questions

How many units is 50 mg of NAD+?: It depends entirely on how much water you added. In a 500 mg vial reconstituted with 2 mL, the concentration is 250 mg/mL, so 50 mg is 0.2 mL, which is 20 units on a U-100 insulin syringe. In the same vial with 1 mL of water it is 10 units, and with 3 mL it is 30 units.
How much bacteriostatic water for a 500 mg NAD+ vial?: 2 mL is the usual choice. It gives 250 mg/mL, which puts the commonly reported range of 25 mg to 200 mg between roughly 10 and 80 units. Aim for a draw between about 10 and 50 units, where the barrel is easiest to read, and add or remove water to get there.
How many doses are in a 500 mg vial?: Divide 500 by your dose. At 50 mg that is 10 doses, which at once daily is 10 days.
How many units is 100 mg of NAD+?: In a 500 mg vial with 2 mL of water, 40 units on a U-100 syringe. In a 1,000 mg vial with 5 mL, 50 units.

IndependentThis site does not sell peptides and is not owned by a vendor.

The maths is openThe formula is on every page and in the methodology. The code is one file with an automated test suite, run before each deploy.

How it is fundedNo ads and no vendor links here. It is published by the team behind Peptide Bureau, which earns from affiliate links on its own site, and VialHaus, the same team's vial storage shop, which the storage notes link to.

ReviewedDose ranges and half-lives checked 3 September 2026.

Buying NAD+?

Peptulator does not list, rank or link vendors. Whoever the supplier is, use the strength printed on your own vial and check the batch certificate of analysis before you rely on any number here.

The NAD+ guideDosing, evidence and side effects, at Peptide Bureau Read a syringeU-100 vs U-40, and the 2.5x error Build a full protocolThe stack builder at Peptide Bureau, about two minutes

Common conversions

The same three-step maths, pre-filled for the doses people ask about most. Units on a U-100 insulin syringe, where 100 units is 1 mL.

mg to units calculator Any dose at any concentration, both directions, with the full reference tables
Units to mg calculator What the units you drew are in milligrams
1 mg to units The most-asked conversion, at every common setup

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Every one of the 27 compound calculators, charts and tools: the full list.

Before you use these numbers This is a unit-conversion tool. It turns a vial strength and a water volume into a concentration, a draw volume and a syringe mark. It does not tell you what to take, whether to take it, or whether a compound is safe for you. Most compounds listed are sold for laboratory research and are not approved for human use. Nothing here is medical advice. Dosing decisions belong with a licensed clinician who knows your history. Always check the strength printed on your own vial rather than trusting a preset.