Life Stage Group		Calcium(mg/day)	Phosphorus(mg/day)	Magnesium (mg/day)	Vitamin D (µm/day) a b	Fluoride (mg/day)	Thiamine (mg/day)	Riboflavin (mg/day)	Niacin (mg/day) c	Vitamin B6 (mg/day)	Folate (µg/day) d	Vitamin B12 (µg/day)	Pantothenic Acid (mg/day)	Biotin (µg/day)	Choline (mg/day) e
Infants
	0–6 months	210*	100*	30*	5*	0.01*	0.2*	0.3*	2	0.1*	65*	0.4*	1.7	5	125
	7–12 months	270*	275*	75*	5*	0.5*	0.3*	0.4*	4	0.3*	80*	0.5*	1.8	6	150
Children
	1–3 years	500*	460	80	5*	0.7*	0.5	0.5	6	0.5	150	0.9	2	8	200
	4–8 years	800*	500	130	5*	1*	0.6	0.6	8	0.6	200	1.2	3	12	250
Males
	9–13 years	1,300*	1,250	240	5*	2*	0.9	0.9	12	1.0	300	1.8	4	20	375
	14–18 years	1,300*	1,250	410	5*	3*	1.2	1.3	16	1.3	400	2.4	5	25	550
	19–30 years	1,000*	700	400	5*	4*	1.2	1.3	16	1.3	400	2.4	5	30	550
	31–50 years	1,000*	700	420	5*	4*	1.2	1.3	16	1.3	400	2.4	5	30	550
	51–70 years	1,200*	700	420	10*	4*	1.2	1.3	16	1.7	400	2.4 f	5	30	550
	>70 years	1,200*	700	420	15*	4*	1.2	1.3	16	1.7	400	2.4	5	30	550
Females
	9–13 years	1,300*	1,250	240	5*	2*	0.9	0.9	12	1.0	300	1.8	4	20	375
	14–18 years	1,300*	1,250	360	5*	3*	1.0	1.0	14	1.2	400 g	2.4	5	25	400
	19–30 years	1,000*	700	310	5*	3*	1.1	1.1	14	1.3	400	2.4	5	30	425
	31–50 years	1,000*	700	320	5*	3*	1.1	1.1	14	1.3	400	2.4	5	30	425
	51–70 years	1,200*	700	320	10*	3*	1.1	1.1	14	1.5	400	2.4	5	30	425
	>70 years	1,200*	700	320	15*	3*	1.1	1.1	14	1.5	400	2.4	5	30	425
Pregnancy
	≤18 years	1,300*	1,250	400	5*	3*	1.4	1.4	18	1.9	600 h	2.6	6	30	450
	19–30 years	1,000*	700	350	5*	3*	1.4	1.4	18	1.9	600	2.6	6	30	450
	31–50 years	1,000*	700	360	5*	3*	1.4	1.4	18	1.9	600	2.6	6	30	450
Lactation
	≤18 years	1,300*	700	360	5*	3*	1.4	1.6	17	2.0	500	2.8	7	35	550
	19–30 years	1,000*	700	310	5*	3*	1.4	1.6	17	2.0	500	2.8	7	35	550
	31–50 years	1,000*	700	320	5*	3*	1.4	1.6	17	2.0	500	2.8	7	35	550

^aAs cholecalciferol. 1 µg cholecalciferol = 40 IU vitamin D.
^bIn the absence of adequate exposure to sunlight.
^cAs niacin equivalents (NE). 1 mg of niacin = 60 mg of tryptophan; 0–6 months = preformed niacin (not NE).
^dAs dietary folate equivalents (DFE). 1 DFE = 1 µg food folate = 0.6 µg of folic acid from fortified food or as a supplement consumed with food = 0.5 µg of a supplement taken on an empty stomach.
^eAlthough AIs have been set for choline, there are few data to assess whether a dietary supply of choline is needed at all stages of the life cycle, and it may be that the choline requirement can be met by endogenous synthesis at some of these stages.
^fBecause 10 to 30% of older people may malabsorb food-bound B12, it is advisable for those older than 50 years to meet their RDA mainly by consuming foods fortified with B12 or a supplement containing B12.
^gIn view of evidence linking folate intake with neural tube defects in the fetus, it is recommended that all women capable of becoming pregnant consume 400 µg from supplements or fortified foods in addition to intake of food folate from a varied diet.
^hIt is assumed that women will continue consuming 400 µg from supplements or fortified food until their pregnancy is confirmed and they enter prenatal care, which ordinarily occurs after the end of the periconceptional period—the critical time for formation of the neural tube.
This table presents Recommended Dietary Allowances (RDAs) in bold type and Adequate Intakes (AIs) in ordinary type followed by an asterisk (*). RDAs and AIs may both be used as goals for individual intake. RDAs are set to meet the needs of almost all (97 to 98%) individuals in a group. For healthy breastfed infants, the AI is the mean intake. The AI for other life-stage and gender groups is believed to cover needs of all individuals in the group.