B. Water-Soluble Vitamins

Measure

Vitamin C, mg

Thiamin, mg

Riboflavin, mg

Niacin, mg of NEf

Vitamin B6, mg

Folate, µg

Vitamin B12, µg

Estimated secretion in milkc Increment in RDAsd,e for the following periods of lactation:

24–40

0.13–0.21

0.21–0.35

0.9–1.5

0.06–0.09

50–83

0.6–1.0

0–6 mo

35

0.5

0.5

5

0.5

100

0.6

6–12 mo

30

0.5

0.4

5

0.5

80

0.6

Comments

Estimated 85% absorption

Increment higher than secretion due to increased energy needs

Estimated 70% utilization for milk production

Increment higher than secretion due to increased energy needs

The milk concentration used by the subcommittee is for unsupplemented women

Estimated 50% absorption; RDA based on 50 rather than 83 µg/liter

RDA based on 0.6 rather than 1.0 µg/liter



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