Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate

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Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate (2005)
Food and Nutrition Board (FNB)

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. "5 Potassium." Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate. Washington, DC: The National Academies Press, 2005.

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Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate

TABLE 5-9 Potassium Content in Human Milk

Reference	Study	Stage of Lactation^a	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.