The energy-yielding nutrient that makes up 55% of breast milk is Fat.
The Arachidonic Acid (ARA) essential fatty acid is present in the breast milk which promotes good skin and growth to the infant.
This milk contains all of the indispensable nutrients, antibodies, good fat, and protein that a baby requires. Also, a research divulge that mother's diet does not affect the average amount of fat or calories in milk.
It is so because the breastmilk contains fatty acids which varies in relation to maternal diet. When a mother consumes more long chain polyunsaturated fatty acids, her breastmilk will contain higher proportions of those fats.
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