TABLE 3.

Ingredients in products from NHANES DS files with DSID-predicted content below the labeled amount¹

	2003–2004		2005–2006		2007–2008		2009–2010		2011–2012		2013–2014
Ingredients, NHANES cycles	n/Total n, %	w/W, %	n/Total n, %	w/W, %	n/Total n, %	w/W, %	n/Total n, %	w/W, %	n/Total n, %	w/W, %	n/Total n, %	w/W, %
Adult MVM-1
Thiamin	417/466, 89.5	93.8	447/504, 88.7	93.7	446/494, 90.3	93.9	—	—	—	—	—	—
Vitamin B-6	108/480, 22.5	10.9	130/527, 24.7	13.3	137/533, 25.7	13	—	—	—	—	—	—
Adult MVM-2
Magnesium	—	—	—	—	—	—	333/333, 100	100	328/328, 100	100	382/382, 100	100
Phosphorus	—	—	—	—	—	—	45/132, 34.1	29.3	15/128, 11.7	11.8	19/161, 11.8	13.5
Thiamin	—	—	—	—	—	—	459/459, 100	100	470/470, 100	100	504/504, 100	100
Vitamin A	—	—	—	—	—	—	58/400, 14.5	4.57	62/405, 15.3	5.5	50/461, 10.9	4.46
Nonprescription prenatal MVMs
Niacin	—	—	—	—	19/20, 95	99.1	23/25, 92	97.4	26/27, 96.3	97.9	—	—
Thiamin	—	—	—	—	20/20, 100	100	25/25, 100	100	26/26, 100	100	—	—
Vitamin B-6	—	—	—	—	20/20, 100	100	25/25, 100	100	27/27, 100	100	—	—
Zinc	—	—	—	—	17/20, 85	94.7	17/23, 73.9	86.8	16/26, 61.5	84.3	—	—
n–3 FA supplements
EPA	—	—	62/62, 100	100	96/96, 100	100	89/89, 100	100	—	—	—	—

¹Ingredients with overages of 0–10% are not included in Tables 1–3. The list of ingredients statistically evaluated by regression varied by product category (7). “n/Total n” indicates the number of products predicted to have ingredient amounts below the label value divided by the total number of the products in the DS category for each NHANES cycle (within the DSID regression ranges); “w/ W” indicates n/total n converted to weighted frequency with NHANES weights: the market share of products predicted to have ingredient levels below the label divided by the total market share of products in the DS category containing each ingredient per NHANES cycle (within the DSID regression ranges). DS, dietary supplement; DSID, Dietary Supplement Ingredient Database; MVM, multivitamin-mineral; MVM-1, first MVM study; MVM-2, second MVM study.