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TABLE 5-9 Potassium Content in Human Milk

Reference

Study

Stage of Lactationa

Potassium Concentration (g/L)b

Gross et al., 1980

18 women

1 mo pp

0.59

Picciano et al., 1981

26 women

1 mo pp

2 mo pp

3 mo pp

0.46

0.42

0.41

Keenan et al., 1982

14 women

3.5–6 wk pp

8.5–18 wk pp

20–32 wk pp

0.59

0.54

0.52

Lemons et al., 1982

7 women

1 mo pp

1.5 mo pp

> 2 mo pp

0.53

0.56 preterm

0.53 preterm

Dewey and Lonnerdal, 1983

20 women

1 mo pp

2 mo pp

3 mo pp

4 mo pp

5 mo pp

6 mo pp

0.53

0.48

0.47

0.46

0.46

0.43

a pp = postpartum.

b All values except those from mothers with preterm infants were averaged together to derive average potassium content of human milk = 0.5 g/L.

day (0.5 g/L × 0.6 L/day). Thus the total potassium intake is estimated to be 0.74 g/day (0.3 g/day + 0.44 g/day). Therefore, the AI is 0.7 g (18 mmol)/day of potassium, after rounding.

Potassium AI Summary, Ages 0 Through 12 Months

AI for Infants

0–6 months

0.4 g (10 mmol)/day of potassium

7–12 months

0.7 g (18 mmol)/day of potassium

Children and Adolescents Ages 1 Through 18 Years

Evidence Considered in Setting the AI

Direct evidence on the potassium requirements of children is lacking. Blood pressure is one potential indicator; however, few studies



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