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Typically, NAD therapy starts with a loading phase, during which injections may be administered daily or every other day for one to two weeks

Furthermore, peptides typically exhibit poor membrane permeability [121]

A 1000mcg (1mg) dose would be 40 units

This means 0.125 mL (12.5 units on an insulin syringe) delivers 0.25 mg (250 mcg)

Potential mild effects observed in animal and in vitro models include transient fatigue, mild nausea, or digestive discomfort related to metabolic acceleration

Of course, unless several other people in your household will be taking the supplement, you'll probably want an interval somewhere in the middle of that range, as a single user can get three months of use from a single bottle