More blood results (prior to b12 injections) : r B12_Deficiency Vitamin B12 Absorption Post Gastrectomy Human STEAM How many milliliters of sterile water should be used to reconstitute a 500 mg vial of nicotinamide adenine dinucleotide (NAD) and how many insulintype syringe units correspond to the weekly injection dose? Buy SC NAD+ with Bacteriostatic Water Injection Here is how I reconstitute my 1000mg vial of NAD+ for my lab rat. , 5ml bac water into vial, Roll, dont shake! , 50 units on a 1ml insulin syringe equals 100mg of NAD+. 20 units equals 40mg NAD+.