Started 250mg of Thorne brand Niagen two days ago, in the morning, on an empty stomach with my usual dose of coffee. Days one and two...a noticeable boost in energy akin to a moderate dose of ALCAR, mental and physical that keeps going for most of the day although a tiny crash in the evenings(craving a nap). Sleep has been no more disturbed than normal but do feel more energy upon waking.
Does not seem to help my attention deficit...If anything, I really just want to abandon tedious desk tasks and do something outdoors more than usual.