Sharing my sister experience UPDATE:
Week1
After taking NR 275mg/day for 1 week, now her constipation seems to improve. Really unexpected though. I mean I really can't relate the connection between constipation and NAD+. I was expecting she said something like feel more energetic, feel better sleep, etc....but she said constipation improve and getting better! of course, she doesn't have problem sleeping and constipation is her only main concern for long time...still...
Week2
Feel more stamina after gym, not feeling like tired or soreness after gym.
Week3
Stopped for 5 days due to outstation trip. No adverse feeling so far. Retake NR started today.
Week4
Feel energetic and sometimes sleep almost at 2 am, but surprisingly wake up with full of energy throughout the next day. Constipation improve a bit. Reduce weight. No vivid dream. More stamina, won't feel tired as before NR days. Do note that she doesn't even know what she is taking, I gave her a bottle and just told her it is a supplement like Vitamin B. Now she is asking how much and want to order to continue to take it. I believe that is really a positive sign because this things are not cheap. She was surprised when I told her the price of one bottle, so expensive she said, but she still want to consider to take it after finishing the bottle.
Age: 57, Female, Healthy, gym 1-2 times a week. pre-diabetic, BP on high side (still normal). long time constipation problem.