TABLE 6-1 Magnesium (Mg) Balance Studies in Adolescents Aged 9 through 18 Years

Study, Year

n

Age (y)

Weight (kg)

Adaptation period (d)

Balance period (d)

Average Daily Mg Intake

Balance

Comments

Females

Andon et al., 1996

13

10.5–12.5

39 ± 5

7

7

176 mg (4.45 mg/kg)

19 ± 25 mg/d

Intake >5.0 mg/kg/d resulted in positive balance in all subjects.

 

13

 

42 ± 8

7

7

176 mg (4.45 mg/kg)

22 ± 15 mg/d

Half of subjects on 1,667 mg Ca/d; half on 1667 mg Ca/d.

Greger et al., 1978

5

12.5–14.5

34.5–58.5

9

21

190 ± 29mg

−6.8 ± 10.4mg/d

At intakes of 4.0 mg/kg/d, only 2 of the 26 girls were in positive balance.

 

5

   

9

21

195 ± 29 mg

−6.8 ± 10.4 mg/d

At intakes of 4.0 mg/kg/d, only 2 of the 26 girls were in positive balance.

 

4

   

9

21

195 ± 29 mg

−1.8 ± 2.2 mg/d

 

Greger et al., 1979

11

12.5–14.2

52.5 ± 13.6

5

9

Avg. 276 mg

15 ± 18 mg/d

Diet contained 1,049 mg calcium; 11.3 mg zinc.

       

5

9

 

2 ± 36 mg/d

Diet contained 1,049 mg calcium; 14.5 mg zinc.



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