In cases of where niacin has allegedly helped alleviate fatigue, depression, and anxiety in individuals, the reported dosage is usually 3 grams. In some cases 1.5 grams. If your truly trying to experience noticeable beneficial effects from niacin, I wouldn't go under 1.5 grams. I would recommend flush-free niacin. And remember: In general, daily values of vitamins are based much more on avoiding deficiencies, rather than optimal health.
15 milligrams
It is "Recommended Daily Allowance"
Really....
Depending on the age of the boy, you can estimate a daily recommended allowance for calories to be in between 1500 to 2000 (with the later being the allowance for an Adult Male).
32 oz.
DRI-daily recommended intake RDA- recommended daily allowance
The recommended daily caloric allowance for an adult female is 2,200 calories. For a male, the allowance is 2,700 calories. The actual amount of calories needed depends on age and level of activity.
The answer is 1500-2000 calories
European Community Recommended Daily Allowance
Recommended Daily Allowance
18 milligrams
2 and a half to three cups