Abstract
Seventy-six milk- and soy-based infant formula samples from four manufacturers were assayed for thiamine, riboflavin, and ascorbic acid. Mean vitamin levels per 100 kcal in milk formulas were 162.7 jug of thiamine, 261.0 μg of riboflavin, and 15.3 mg of ascorbic acid. Means for soy formulas were 145.0 μg of thiamine, 106.7 μ of riboflavin, and 15.3 mg of ascorbic acid. All met the requirements of the 1980 Infant Formula Act. Three formulas contained thiamine levels lower than the label declarations and two formulas contained less riboflavin than the declared amount. All ascorbic acid levels were above the declared amounts. Significant differences were found in the vitamin levels in formulas produced by different manufacturers. For a 6-kg infant, approximately 1 liter of formula would provide the recommended energy intake of 690 kcal and would provide thiamine, riboflavin, and ascorbic acid in amounts well above the RDA for each vitamin.
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