I just learned there is an increased risk of diabetes on niacin therapy: heart.bmj.com/content/102/3...
This study was based on people taking Niacin for cardiovascular reasons, which I think would be dosed at 500 to 6000 mg a day: mayoclinic.org/drugs-supple...
According to this video you should be able to eliminate the diabetes risk by not having carbs 3 to 6 hours after your niacin, therefore I will start taking my 1000 mg of niacin after my last meal of the day: How to Take Niacin Without Getting Diabetes youtu.be/76mrnovnGQ4