title: Daily magnesium intake and serum magnesium concentration among Japanese people.
abstract: BACKGROUND
  The vitamins and minerals that are deficient in the daily diet of a normal adult remain unknown. To answer this question, we conducted a population survey focusing on the relationship between dietary magnesium intake and serum magnesium level.
  
  
  METHODS
  The subjects were 62 individuals from Fukui Prefecture who participated in the 1998 National Nutrition Survey. The survey investigated the physical status, nutritional status, and dietary data of the subjects. Holidays and special occasions were avoided, and a day when people are most likely to be on an ordinary diet was selected as the survey date.
  
  
  RESULTS
  The mean (+/-standard deviation) daily magnesium intake was 322 (+/-132), 323 (+/-163), and 322 (+/-147) mg/day for men, women, and the entire group, respectively. The mean (+/-standard deviation) serum magnesium concentration was 20.69 (+/-2.83), 20.69 (+/-2.88), and 20.69 (+/-2.83) ppm for men, women, and the entire group, respectively. The distribution of serum magnesium concentration was normal. Dietary magnesium intake showed a log-normal distribution, which was then transformed by logarithmic conversion for examining the regression coefficients. The slope of the regression line between the serum magnesium concentration (Y ppm) and daily magnesium intake (X mg) was determined using the formula Y = 4.93 (log(10)X) + 8.49. The coefficient of correlation (r) was 0.29. A regression line (Y = 14.65X + 19.31) was observed between the daily intake of magnesium (Y mg) and serum magnesium concentration (X ppm). The coefficient of correlation was 0.28.
  
  
  CONCLUSIONS
  The daily magnesium intake correlated with serum magnesium concentration, and a linear regression model between them was proposed.
authors.affiliation: Chiyoda Public Health Center, Tokyo, Japan. y-akizawa@city.chiyoda.lg.jp
authors.forename: Yoriko
authors.initials: Y
authors.lastname: Akizawa
authors.forename: Sadayuki
authors.initials: S
authors.lastname: Koizumi
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Itokawa
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Ojima
authors.forename: Yosikazu
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Tarou
authors.initials: T
authors.lastname: Tamura
authors.forename: Yukinori
authors.initials: Y
authors.lastname: Kusaka
mesh_terms: D000328:Adult; D017677:Age Distribution; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008137:Longitudinal Studies; D008274:Magnesium / Q000008:administration & dosage* / Q000097:blood*; D008275:Magnesium Deficiency / Q000175:diagnosis / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009749:Nutrition Surveys; D009751:Nutritional Requirements; D009752:Nutritional Status; D017678:Sex Distribution
chemical_list: D008274:Magnesium