I have been curious about trying NAD but wonder if it is mostly hype. At over fifty it should theoretically help. Hope your flare was just a coincidence.
I felt nervous starting because of what others had posted but it turned out fine with only a slight burning sensation. The odd part is my foot neuropathy which is usually managed by medication got much worse about three hours later. I cannot tell if it is connected so I will see what happens after the next dose on Tuesday.