Hi klittr3637,

B-3 (niacinamide, non-flushing form only) is not the same as NAD. Niacinamide is the pre-cursor to the body being able to make NAD on it's own again. NAD naturally occurs and is made by the body, under good/healthy circumstances.

The niacinamide will address oxygen levels and the fatigue because once your body has more NAD these basic functions are able to regulate and get back to normal. This is my own intuitive understanding, and how it FELT to me in my own body when I was going through these processes. Clearly I don't have a specific scientific reason but this was my impression when I was going through it. That is why the B-3 is such a game changer because the NAD is absolutely required for all biological processes.

Some people ONLY need B-3 and find themselves back to normal very quickly. I also took an anti-histamine daily (still do actually). Some people take two forms of histamine blockers - H1 and H2 blockers - at least until their extreme symptoms are under control. Hope that helps!