Why frozen breastmilk turn metalic taste after defrost and baby refuse it


Lipase is an enzyme in breastmilk with the function to break down the fats in the milk to help baby digest it. Lipase work soon after the milk is expressed but some mom found that only after 24 hours or more, fats break down process tend to alter the taste.
Milk with lipase are safe to drink but depending on baby, some dislike the taste and refuse it.

What does Lipase do?

Lipase beneficial function in breastmilk
1. Help keep milk fat well-mixed with the ‘whey’ portion of the milk and keep the fat globules small so they are easily digestible.

2. Help break down fats in the milk so that the fat soluble nutrients such as A,D,E and K and free fatty acids which keep baby protected from illness are easily available to baby.

What can be done when baby reject the milk due to excess lipase?

Before freezing a newly expressed breastmilk, flash heat the milk to inactivate the lipase and stop the process of fat digestion.

How to flash heat the breastmilk?

The purpose of flash heat is to take away the icky taste by destroying some anti-infective properties of the milk. During the flash heat, there will be minimal nutrient loss but still the best compare to formula milk. Nutrient loss would not be an issue unless all supplies for the baby has been heat-treated.

There are 2 method that you can choose from:

1. Scalding
Heat milk until you see little bubbles around the edge of the pan, then quickly cool and store the milk. That would be somewhere 82 degree Celsius.

2. Double boil
Similar method like you preparing ginseng soup with the double boil method. Place a bottle of breastmilk in a pot filled with water. Once the water comes to a boil, remove the bottle with the breastmilk to cool and store.

Do this only if :

1. Your baby refuse thawed frozen breastmilk.
2. You intend to store the breastmilk in the freezer. Else you don’t have to as those in fridge should not taste as bad as after freezing.

Leave a Reply

Your email address will not be published. Required fields are marked *

Back To Top