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Purpose We investigated whether seaweed intake is associated with sex steroid levels in young Japanese children. Methods The design of the study was cross-sectional and it was conducted in October–November 2006. Subjects were substantially healthy preschoolers, 230 boys and 198 girls, aged 3–6 years. Dietary data, including seaweed intake, were assessed using 3-day dietary records covering 2 consecutive...
Purpose We aimed to assess the association of body size at birth or physical activity with sex steroid levels, independent of body mass among young children. Methods The cross-sectional study was conducted in 2006. Subjects were 230 boys and 198 girls, aged 3–6 years. Birth weight was based on parents’ reports. Questions about physical activity focused on outdoor playtime. Urinary estrone, estradiol,...
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