Synthesis and secretion of fat in human milk and its role in infant development

Hartmann, Peter; Mitoulas, Leon R.; Sherriff, Jill

doi:10.2740/jisdh.10.4_65

J.Integr.Stud.Diet.Habits

2000

DOI: 10.2740/jisdh.10.4_65

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Synthesis and secretion of fat in human milk and its role in infant development

Peter Hartmann¹,

Leon R. Mitoulas²,

Jill Sherriff³

Abstract: Approximately 99% of the fat in huma

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Cited by 2 publications

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“…However, the determination of infant FA intake is not straightforward. Fat in human milk is variable, changing in content over the course of a feed (Hytten, 1954), during the day (Daly et al 1993;Hartmann et al 2000) and over the course of lactation (Butte et al 1984;Mitoulas et al 2002). Furthermore, the FA composition itself can vary over the course of the day (Hall, 1979;Daly et al 1993) and throughout the first year of lactation (Idota et al 1991;Luukkainen et al 1994;Makrides et al 1995;Huisman et al 1996), as well as from country to country (Read et al 1965;Kneebone et al 1985;Innis & Kuhnlein, 1988).…”

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Infant intake of fatty acids from human milk over the first year of lactation

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Despite the importance of human milk fatty acids for infant growth and development, there are few reports describing infant intakes of individual fatty acids. We have measured volume, fat content and fatty acid composition of milk from each breast at each feed over a 24 h period to determine the mean daily amounts of each fatty acid delivered to the infant from breast milk at 1, 2, 4, 6, 9 and 12 months of lactation in five women. Daily (24 h) milk production was 336·60 (SEM 26·21) and 414·49 (SEM 28·39) ml and milk fat content was 36·06 (SEM 1·37) and 34·97 (SEM 1·50) g/l for left and right breasts respectively over the course of the first year of lactation. Fatty acid composition varied over the course of the day (mean CV 14·3 (SD 7·7) %), but did not follow a circadian rhythm. The proportions (g/100 g total fatty acids) of fatty acids differed significantly between mothers (P, 0·05) and over the first year of lactation (P,0·05). However, amounts (g) of most fatty acids delivered to the infant over 24 h did not differ during the first year of lactation and only the amounts of 18 : 3n-3, 22 : 5n-3 and 22 : 6n-3 delivered differed between mothers (P,0·05). Mean amounts of 18 : 2n-6, 18 : 3n-3, 20 : 4n-6 and 22 : 6n-3 delivered to the infant per 24 h over the first year of lactation were 2·380 (SD 0·980), 0·194 (SD 0·074), 0·093 (SD 0·031) and 0·049 (SD 0·021) g respectively. These results suggest that variation in proportions of fatty acids may not translate to variation in the amount delivered and that milk production and fat content need to be considered.

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Infant intake of fatty acids from human milk over the first year of lactation

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Influences of maternal dietary intake and suckling on breast milk lipid and fatty acid composition in low-income women from Brasilia, Brazil

Cunha¹,

Costa²,

Ito³

2005

Early Human Development

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Synthesis and secretion of fat in human milk and its role in infant development

Abstract: Approximately 99% of the fat in huma

Cited by 2 publications

References 29 publications

Infant intake of fatty acids from human milk over the first year of lactation

Infant intake of fatty acids from human milk over the first year of lactation

Influences of maternal dietary intake and suckling on breast milk lipid and fatty acid composition in low-income women from Brasilia, Brazil

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