Dietary Reference Intakes for Vitamin B3 (Niacin) in United States (per day)

Males	EAR	RDA	AI	UL
0-6 months	-	-	2 mg	-
7-12 months	-	-	4 mg	-
1-3 years	5 mg	6 mg	-	10 mg
4-8 years	6 mg	8 mg	-	15 mg
9-13 years	9 mg	12 mg	-	20 mg
14-18 years	12 mg	16 mg	-	30 mg
19-30 years	12 mg	16 mg	-	35 mg
31-50 years	12 mg	16 mg	-	35 mg
50-70 years	12 mg	16 mg	-	35 mg
70 years and older	12 mg	16 mg	-	35 mg

Females	EAR	RDA	AI	UL
0-6 months	-	-	2 mg	-
7-12 months	-	-	4 mg	-
1-3 years	5 mg	6 mg	-	10 mg
4-8 years	6 mg	8 mg	-	15 mg
9-13 years	9 mg	12 mg	-	20 mg
14-18 years	11 mg	14 mg	-	30 mg
19-30 years	11 mg	14 mg	-	35 mg
31-50 years	11 mg	14 mg	-	35 mg
50-70 years	11 mg	14 mg	-	35 mg
70 years and older	11 mg	14 mg	-	35 mg

Pregnancy	EAR	RDA	AI	UL
less than 18 years	14 mg	18 mg	-	30 mg
19-30 years	14 mg	18 mg	-	35 mg
31-50 years	14 mg	18 mg	-	35 mg

Lactation	EAR	RDA	AI	UL
less than 18 years	13 mg	17 mg	-	30 mg
19-30 years	13 mg	17 mg	-	35 mg
31-50 years	13 mg	17 mg	-	35 mg