Table 1. Tolerable Upper Intake Levels (UL^a ) for Certain Nutrients and Food Components

	Life-Stage	Calcium	Phosphorus	Magnesium	Vitamin D	Fluoride	Niacin	Vitamin B6	Synthetic Folic Acid	Choline
	Group	(g/day)	(g/day)	(mg/day) b	(µg/day)	(mg/day)	(mg/day)c	(mg/day)	(µg/day)c	(g/day)
	0-6 months	NDd	ND	ND	25	0.7	ND	ND	ND	ND
	7-12 months	ND	ND	ND	25	0.9	ND	ND	ND	ND
	1-3 years	2.5	3	65	50	1.3	10	30	300	1.0
	4-8 years	2.5	3	110	50	2.2	15	40	400	1.0
	9-13 years	2.5	4	350	50	10	20	60	600	2.0
	14-18 years	2.5	4	350	50	10	30	80	800	3.0
	19-70 years	2.5	4	350	50	10	35	100	1,000	3.5
	> 70 years	2.5	3	350	50	10	35	100	1,000	3.5
	Pregnancy
	< 18 years	2.5	3.5	350	50	10	30	80	800	3.0
	19-50 years	2.5	3.5	350	50	10	35	100	1,000	3.5
	Lactation
	< 18 years	2.5	4	350	50	10	30	80	800	3.0
	19-50 years	2.5	4	350	50	10	35	100	1,000	3.5

^a UL = the maximum level of daily nutrient intake that is likely to pose no risk of adverse effects. Unless otherwise Specified, the UL represents total intake from food, water, and supplements. Due to lack of suitable data, ULs could not be established for thiamin, riboflavin, vitamin B₁₂, pantothenic acid, or biotin. In the absence of ULs, extra caution may be warranted in consuming levels above recommended intakes.

^b The UL for magnesium represents intake from a pharmacological agent only and does not include intake from food and water.

^c The ULs for niacin and synthetic folic acid apply to forms obtained from supplements, fortified foods, or a combination of the two.

^d ND: Not determinable due to lack of data of adverse effects in this age group and concern with regard to lack of ability to handle excess amounts. Source of intake should be from food only to prevent high levels of intake.