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High Lactic Acid?  

post #1 of 9
Thread Starter 
Hi all,

I have been pumping, freezing, and donating my milk for a very long time. Recently I have noted that milk that has been in the fridge for 24 hours smells and tastes bad. A bag of milk that was frozen for about 2 weeks also smelled and tasted bad. I have milk that has been frozen for a year. Same thing. I will be trying one sample of milk from each month that is stored to see how widespread this is. It may be that all my milk is “bad.”

I am working with a lactation consultant to try and maintain my milk supply as we go through the adoption process. I have super-sterilized my pump kit. I even tried my old ameda pump to see if maybe the new kit is beyond sterilization. The LC think I may have too high a lactic acid level. Her recommendation is I heat and immediately freeze every time I pump. She thinks it will be problematic if I even try to heat each pumping but save in the fridge until the end of the day (to try and save on the cost of milk bags.) She also thinks the milk I have stored is not safe for a baby.

I haven’t had need to use my stored milk for my baby in about a year. When I was using it, I would pump every day for a week and store it in the fridge. Then, when I worked all weekend, he got refrigerated, not frozen milk. Although the random bottle smelled funny and I’d throw it away, my milk did not usually smell, even after a week in the fridge. I have also been donating year old stuff (stored in a deep freeze) to an adopted baby. His mom usually mixed it with other milk, but he never got sick or had other problems from the milk.

Does anyone have experience with or thoughts about this? It would be horrible to throw away a year’s supply of milk.

Also, though it’s not good to microwave frozen milk, what about using a microwave to heat the milk to deal with Lactic Acid?
post #2 of 9
It could be a number of things, but since you mentioned that your refrigerated milk go "bad" after 24 hours I am thinking that you probably have high lipase (NOT lactic acid...the LC might have been confused). Lipase is an enzyme that metabolizes fat. Since fat is part of what makes breastmilk taste good, having high levels means that the fat leaves your milk sooner, resulting in less tasty milk. Apparently freezing facilitates the process (meaning that freezer milk will taste worse than refrigerator milk). The way most women decribe high lapase milk is that is tastes like soap or it tastes metallic (I have this and I actually think my "bad" milk tastes like soapy metal!).

If you end up with high lipase you can still store your milk, you will just need to go through the extra step of scalding your milk. There are several different recommendations about the best scalding method (kellymom has some and there is a thread on the LLL forum about scalding milk with high lipase) so I can only tell you what works for me. I need to scald my milk within 24 hours of pumping (ideally within 8 hours). To do this I set up a pan with about 1-2 inches of boiling water. I then put my bottled pumped milk in the pan and heat the milk to 160 degrees (I use a cooking thermometer) for 15s. Then I put the milk bottle in an ice water bath to help cool it. My scalded milk lasts 8 days in the refrigerator and can be frozen for at least a week (I only found out that I had high lipase 2 weeks ago - and had to toss tons of frozen milk - so I haven't fully tested the limits of my frozen milk).

DO NOT USE A MICROWAVE TO SCALD MILK - it needs to be done on the stove top (or some people use a bottle warmer). I am not sure why, but apparently the microwave damages the milk?

One last word about high lipase. Apparently it isn't actually "bad" milk (even though it smells and tastes funny) and some little ones will take it without a fuss (mine screamed bloody murder though). So, if the little one will take it, you might not need to go through the extra scalding step. However, if the little one is picky (like mine) you can still DONATE high lipase milk (I was excluded from donating because I take medication) so you are okay on that front.

That being said, I do want to comment on the "life" of milk. You really should not be giving year old milk to the baby. My understanding is that freezer milk is really only good/safe for 3 months (maybe 6 months if you push it). Kudos to you though for helping out an adopted baby!
post #3 of 9
Quote:
Originally Posted by dctexan View Post
That being said, I do want to comment on the "life" of milk. You really should not be giving year old milk to the baby. My understanding is that freezer milk is really only good/safe for 3 months (maybe 6 months if you push it). Kudos to you though for helping out an adopted baby!
Depending on the source you're consulting, breast milk stored in a standard frost-free freezer is good for 3-4 months, while breast milk stored in a deep freeze freezer is good for 6 months to a year.

This is for a couple of reasons: a standard freezer is opened/closed more frequently (impacting its ability to keep a stable temperature), intentionally fluctuates its temperature to stay "frost free," and isn't kept as cold as a deep freeze. (Standard freezer should be 0-5F; deep freeze should be -10 to -5F).
post #4 of 9
Thread Starter 
Thanks for the information. The LC did say Lipase, the lactic acid comment was my mistake (and I can't change the thread name.)

I have an adoptive baby I can pass the milk onto. The frustrating thing is I was trying to save up as we are planning on adopting our own baby. I figured the stored milk would supplement until I (hopefully) could build up my supply from toddler level to newborn level. Or, if I couldn't increase my supply that much, I at least was going to have lots of frozen milk I could use. This is all so frustrating. Last year I could keep milk in the fridge for a week and it wouldn't smell. Also, since my son had frozen milk off and on during the first year of his life and my milkbaby continued taking it, I had no clue that this was going on.

I can't see your message here to recheck the specifics of what you said. You use a double boiler? I've heated two pumpings so far. Both times in a small stainless steel pot right on the heat. I have no thermometer (I'll get one.) Both times the milk sort of separated. Have you had that happen? Guess I'll try and set up a double boiler system and see what happens.

The biggest hassle of all this will be if I have to freeze each pumping separately--that's a lot of expensive milk bags. The LC seemed to think that I'd have the greatest success doing this.

If my milk's only good in the freezer for a couple weeks I will either have my milk baby's family pick it up daily or I'll just toss it. The expense of milk bags is just too much for us to not get any real use out of them. Then I'll hope I get some advance notice on the baby so I can have at least some saved up for it. I will experiment before I go down this road.

By the way, I have seen a couple sources that say milk can be kept in the deep freeze for up to a year.

Thanks again
post #5 of 9
Here are the links to the milk scalding...

LLL Forum Link

Kellymom Link

I actually do NOT use a double boiler. I use a regular pan with enough water so that it is 2 inches (or so) deep, heat to a boil, reduce to simmer (because boiling water will tip my bottles over) and I put the medela Pump In Style bottles (with about 4 oz of milk per bottle) in the water. I find that I can pump all day (at work) and go home and scald the milk that night (no need to scald immediately). I use the thermometer to measure temp. (like I said, i do 160 degrees for 15s, but other sources recommend temps as high as 180 degrees. Since 160 degress works for me, I will stick with it). I think you can scald your milk without a thermometer (supposedly you heat it until you just before it boils...so little bubbles), but I have never been able to do that (even when just cooking with regular milk...I always end up curdling it). My milk doesn't separate while I am scalding (although I might get a bit of a "skin" on the top if I don't stir), but it will separate in the refrigerator (the longer it is in there, the more it separates). However, if I swirl the bottle around, it usually comes back together pretty well. HTHs

By the way, I have heard that milk lasts 6 months-1 yr in a deep freezer. Sorry, I thought you were using the regular freezer.

Once it is cool, I prepare DS' bottles for the next day and immediately freeze the extra.
post #6 of 9
Thread Starter 
Thanks for the info. I decided to "double boil" the milk in a glass canning jar. Even though my medela bottles are supposed to be free of nasty chemicals, I feel better using canning jars. I also got a thermometer. I'll try this with the milk I am pumping as I type.
post #7 of 9
Hi, I answered your post on Milk Share, and I'm still not clear why you are heating the milk? My milk tastes/smells bad almost instantly after I pump it, but it's never bothered my DD (for 17 months) or the babies I have donated to. There is nothing "wrong" with it except the funny taste/smell. If the baby isn't rejecting it then it's not hurting him. Heating the milk destroys a lot of its beneficial properties.
post #8 of 9
Thread Starter 
My milk is undrinkable. To quote my son, "Icky." The bad taste and smell is from a high lipase, not lactic acid, level. The lipase degrades the taste and smell of the milk, though the milk remains safe. Some babies will drink it, others will not. Heating the milk stops or slows down this process. For women who have this problem and work it can almost mean using formula (if they don't scald the milk.) My son is old enough and I don't work that much (he doesn't drink my milk when I'm gone) that it's not an issue for me. However, if I want to have any frozen milk for our adopted baby I have to see how this works.

I've been referred to a great LLL thread.

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

kellysmom also has info on this.
post #9 of 9
I have always heard about it but never heard that the baby wouldn't drink it. Thanks for the info.
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