Fish Oil Intake During Pregnancy May Be Associated With Lower Asthma Incidence During Childhood

New research has shown a significant correlation between fish oil intake during pregnancy and asthma incidence during childhood.
Children whose mothers supplemented with fish oil during pregnancy were significantly less likely to be diagnosed with childhood asthma than children from non-supplementing mothers.

Current evidence suggests that asthma development may be associated with maternal intake of marine omega-3 fatty acids during pregnancy. A recent study was conducted to examine whether an increase in omega-3 fatty acid intake during pregnancy could affect risk of asthma in their offspring.

A population-based sample of 533 women with normal pregnancies were randomly assigned 2:1:1 to receive either four one-gram fish oil capsules/day providing 2.7 grams of omega-3 fatty acids, four similar looking one-gram capsules/day with just olive oil, or no capsules at all.

During the 16 years that passed since childbirth, the rate of asthma incidence was reduced by 63% and the rate of allergic asthma was reduced by 87% in the fish oil group as compared to the olive oil group. Assuming that the intake of olive oil had no significant influence one way or another, these results support the theory that increased fish oil omega-3 fatty acid supplementation in late pregnancy may provide important preventive potential in relation to childhood asthma development. Additional studies on this subject are currently in progress, which should shed more light on the mechanism behind this promising discovery.

American Journal of Clinical Nutrition, Vol. 88, No. 1, 167-175, July 2008

Prenatal Zinc Supplementation Influences Lean Tissue Growth in Infants

It has been suggested that maternal zinc intake influences growth in utero and in the first stages of growth after birth. In a recent study, researchers assessed the effect of maternal zinc supplementation during pregnancy as well as its effects on infant growth during the first twelve months.

A randomized, double-blind, controlled trial of prenatal zinc supplementation was conducted among women in Lima, Peru between 1995 and 1997. Women enrolled during the second trimester and were assigned to receive daily supplements with zinc (15 mg zinc + 60 mg iron + 250 mcg folic acid) or without zinc (just 60 mg iron + 250 mcg folic acid) through pregnancy to one month after delivery. At birth, 546 infants were followed for 12 months to assess growth. Measurements were collected monthly while health status and dietary intake were monitored weekly.

Infants born to mothers supplemented with zinc had significantly larger average growth measures beginning at 4 months and continuing through month 12. Prenatal zinc was associated with greater weight, calf circumference, chest circumference, and calf muscle area.

In this population of women, zinc supplementation during pregnancy resulted in children with better growth measures (which were in turn associated with healthy increases in lean tissue mass).

American Journal of Clinical Nutrition, Vol. 88, No. 1, 154-160, July 2008