Question 1

How many units is a 25 mg dose of NAD+ (100mg vial, 2ml diluent)?

Accepted Answer

50 units on a standard U-100 insulin syringe (0.5 ml). Mixing a 100mg vial of NAD+ with 2ml of bacteriostatic water gives a concentration of 50 mg/ml. On a U-100 insulin syringe that means: 25 mg = 50 units · 50 mg = 100 units · 100 mg = 200 units.

Question 2

What is the concentration of 100mg of NAD+ in 2ml?

Accepted Answer

100mg ÷ 2ml = 50 mg/ml.

Question 3

Which syringe do these unit marks refer to?

Accepted Answer

A standard U-100 insulin syringe, where 100 units = 1 ml. On U-50 or U-30 syringes the same volume reads as half or 30% of the U-100 marks. These are mathematical conversions for organizational purposes only — not medical advice.

Dose	Draw volume	U-100 units
25 mg	0.5 ml	50 U
50 mg	1 ml	100 U
100 mg	2 ml	200 U

NAD+ 100mg in 2ml — syringe units chart