Monthly variations of nutrient intake assessed by one-day dietary record method

Abstract

To know the monthly variations of nutrient intake among Japanese men and women, we conducted a nutritional survey based on one-day record method for 40 subjects (18males and 22females) aged from 31-71 years old in a district of central Japan.We calculated mean nutrient intakes every month and obtained three- month moving average for each subject.The averages in the subjects for each month were assessed by the analysis of variance.The variances of intake of vitamins A, C, D and E, fish oil and monounsaturated fatty acid were large.These findings suggest that the monthly variations should be considered in assessing nutrient intakes in Japan.