. 2013 Apr 5;11(4):497–510. doi: 10.1111/mcn.12038

Table 6.

Proportion of APrON participants exceeding the tolerable upper intake level of key micronutrients through natural health products during pregnancy

Micronutrient	Tolerable upper intake level	First trimester (n = 136)	Second trimester (n = 575)	Third trimester (n = 516)	P *
Micronutrient	Tolerable upper intake level	%	%	%	P *
Folic acid	1000 μg	22	26	21	0.234
Vitamin D	4000 IU	1^a	0.2^b	1^a	0.026 ^†
Calcium	3000 mg	0.0	0.0	0.0	NS
Iron	45 mg	4^a	9^a	19^b	<0.001 ^†

APrON, Alberta Pregnancy Outcomes and Nutrition; NS, not significant. *P value for Chi‐square statistic. ^†Values within a row with different superscripts are significantly different.