解冻的母乳怎么这么难吃啊

尝了尝，觉得难以下咽，一股很怪的味道。我特地在pump后尝，甜甜的，然后冷藏了后
也是甜甜的，冻了解冻，味道就变了。老公说给宝宝吃这么难吃的东西她会厌奶的，气
死我了。 

我问了医生，医生说味道不应该变化很多。难道是我的冰箱出问题了？我都是pump后直
接冷冻的呀。
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我最近看了好多网站，还有LLL的网站，发现像我这种情况很多，但是好多人却没有得到有用的信息。

母乳变得有rusty,soapy是因为有些mom的母乳含lipase过多。lipase主要作用是分解脂肪，但是过多，在freezer里长时间的分解会使母乳产生难以忍受的腥味。 虽然营养成分还在，但是由于味道太难吃，宝宝会拒绝。唯一的办法就是scald breast milk right after pumping and quickly cool down and freeze. scald就是把母乳在锅里烧到边缘开始冒泡跑，注意不是烧开阿。

这个论坛的帖子让我看了如醍醐灌顶，太好了。 ---no microwave!!! Killed the anti-something which is good

http://forums.llli.org/showthread.php?t=297&page=1

I have recently learned that I have high levels of lipase in my BM, and as a result, my BM tastes soapy and metallicy within one day of storage. My daughter refuses this BM in a bottle, but will accept freshly expressed milk (I was testing to see if she was rejecting the bottle itself or the milk - turns out it was the yucky tasting 1-day old milk). freezing immediately doesn't help either. 

I have learned that scalding the milk immediately after expression is the only way to inactivate the enzyme. does this destroy too many other properties? should I just supplement with formula? 

I am a working mom, so I have to do something...I am wondering if there is any way to alter my diet to reduce this enzyme? I generally eat a healthy balanced diet and exercise in moderation.

Scalding milk is the recommended solution for excessive lipase. The breastmilk is still chock full of immunities and nutrients for your baby, scalding is the safest way to reduce the lipase, which as you can see is making the milk taste unpleasant. Lipase is the enzyme that breaks down fat in the milk.

Per the Breastfeeding Answer Book, page 229, "If the mother finds after freezeing and thawing that her milk has a rancid smell, she can prevent this from occurring in the future by heating her expressed milk to a scald (bubbling around the edges but not boiling) right after collecting it, and then quickly cooling and freezing it. Scalding inactivates the lipase (Lawrence and Lawrence p. 696). Once the milk has acquired the rancid smell, however, treating the milk will not help. It is not known whether or not this milk is safe for the baby; however most babies refuse it. 

Some mothers have reported a slightly soapy smell to their frozen milk after it was thawed. This change in smell has been attributed to changes in the milk fats related to storage in self-defrosting refrigerators-freezers; it has not been found to be harmful to the baby (Lawrence and Lawrence, p.696)."

These above guidelines are assuming baby is healthy and full-term, if you have a premature baby the guidelines may be different, check with your baby's doctor.
I have excessive lipase in my milk and work 2 days a week, so have been pumping and scalding in the microwave (also have no stove at work). This was on the recommendation of a LLL Leader - I thought it was the very act of scalding that destroys some of the 'goodies' in the milk so it wouldn't matter whether it was done on stove or by microwave? But I am no expert so perhaps someone could clarify this issue?

Also on her recommendation, I did a series of little tests on my milk when I discovered this issue. I expressed an amount and split it into portions. Some I left out on the bench and tasted every hour to see how long it took to sour. I did the same with a sample in the fridge, plus a sample that I froze immediately, then thawed and left in fridge. All samples soured after about 3-4 hours. So I had to do something with my milk at work.

If you decide to use the microwave, you would have to test the time as all microwaves are so different. In ours, I put 100ml in for 28 seconds on high, and my daughter drinks it fine.

If you don't have access to these articles, I just looked them up through my husband's school account. Basically, they say that microwaving milk kills the anti-infective and other factors in teh milk. Scalding or even pasteurizing on the stove DOES NOT DO THIS. I am surprised, I was always told that pasteurizing would kill the antibodies, etc, but apparently that's not true! But apparently, microwaving DOES do this and makes your milk a perfect place for bacteria to grow. Once human milk has been microwaved, it can be at room temp for only an hour or so for safety, just like formula.