Dietary Supplements Rarely Provide Sufficient Doses for Pregnancy
25 Apr 2023
Clinical Result
TUESDAY, April 25, 2023 -- Almost no dietary supplements in the United States provide key nutrients at sufficient doses for pregnant women, according to a study published in the April issue of the American Journal of Clinical Nutrition.
Noting that most pregnant women in the United States are at risk for inadequate intake of key nutrients from food alone during pregnancy, Katherine A. Sauder, Ph.D., from the University of Colorado Anschutz Medical Campus in Aurora, and colleague estimated the doses of supplementation needed to help most pregnant women achieve the recommended intake. From 2007 to 2019, 24-hour dietary recalls were conducted in 2,450 pregnant participants aged 14 to 50 years. The usual intake of vitamins A and D, folate, calcium, iron, and ω-3 fatty acids was estimated from food alone.
For supplementation, the target dose was ≥198 mcg retinol activity equivalents of total vitamin A, 7 to 91 mcg vitamin D, 169 to 720 mcg dietary folate equivalents of folic acid, 383 to 943 mg calcium, 13 to 22 mg iron, and ≥59 mg ω-3 fatty acids. The researchers found that 69 products (33 prenatal) out of 20,547 dietary supplements contained all six nutrients, and seven products (two prenatal) contained target doses of five nutrients. Only one product contained target doses of all six nutrients, but it required seven tablets per daily serving and cost about $200 per month.
"Reformulation or development of products that maximize the number of pregnant women receiving enough (but not too much) vitamin A, vitamin D, folic acid, calcium, iron, and ω-3 FAs is needed," the authors write.
Two authors disclosed financial ties to the nutrition and other industries.
Abstract/Full Text
Posted April 2023
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