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

NAD+ is sold in 100 to 1,000 mg vials and dosed in tens of milligrams, so the numbers look nothing like a peptide. Enter your vial, water and dose to get the syringe mark.

IndependentThis site does not sell peptides and is not owned by a vendor. Every other calculator on page one of Google belongs to a shop.

The maths is openThe formula is written out on this page and the code behind it is a single file with an automated test suite.

How it earnsAffiliate links on one clearly marked page, and nowhere else. Never inside the calculator.

ReviewedDose ranges and half-life figures last checked 3 September 2026.

Dose to units, at the standard setup

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

Based on a 500 mg vial reconstituted with 2 mL of bacteriostatic water, which is 250 mg/mL, drawn on a standard U-100 insulin syringe, once daily.

About the numbers above

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.

A 500 mg vial at different water volumes

If the draw feels awkward to read, change the water rather than 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 stays in you

Cleared within minutes to hours; the injected molecule itself is not what persists. This site only draws a decay curve where a half-life is actually documented in humans, so there is none here. Treat any precise figure you see elsewhere for NAD+ with suspicion.

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.

Buying NAD+? The where to buy page lists the vendors this site uses and what to check before ordering, and Peptide Bureau keeps the ranked vendor scorecard.

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