Manganese -substituted zinc proteins

The only manganese balance study in adolescents was conducted by Greger et al. (21) who fed diets containing 3.0 mg Mn/day for 30 days. The diets varied in the levels of zinc (7.4 and 13.4 mg) and defatted soy protein and meat. These diets produced negative balances in 13 out of 14 girls. The mean balance was -0.5 mg Mn/day and was not affected by zinc levels or substitution of soy protein for meat... 

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