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It's okay to drink and nurse, with a few caveats.

Pump and Dump is a Myth

breastfeeding newborns Dec 28, 2020

If you’ve ever talked with a nursing mom, you’ve probably heard her speak with frustration about the return of alcohol into her life.  Many moms excitedly look forward to the chance to enjoy a glass of wine, can of beer, or their favorite mixed drink after nine months of sobriety.

Their friends soon remind them, however, that with every drink comes the waste of precious breast milk and time pumping the milk just to dump it down the drain.

I’d like to take you briefly through the biochemistry of this concept. For those who aren’t interested in the scientific backstory, just skip the next four paragraphs for the finale. Spoiler alert — it's okay to drink and nurse, with a few caveats. 

Cue the biochemistry talk: Imagine two big containers of liquid next to each other with an opening between them. The container on the left is the bloodstream, and the one on the right is your breast milk. The opening between the two containers is semi-permeable: some things can pass through, but others can’t. It's like a screen door— it lets fresh air in but keeps squirrels out. Alcohol does pass through this membrane and moves from the blood into breast milk.

Another important principle to understand is gradients. Whenever there is a difference in concentrations between two areas, a gradient exists. One area has a higher concentration, and one has a lower. Substances move from areas of higher concentration to areas of lower concentration. For example, imagine you are in a mob of people, claustrophobic you will naturally move toward an area where there are fewer people!

So, when alcohol is absorbed from the stomach into the bloodstream, the concentration of alcohol is high in the blood compared to your breast milk, so alcohol molecules down their concentration gradient from the blood into the milk. They keep moving until there is no gradient – each has the same number of alcohol molecules. At this point, it seems like the alcohol molecules should be stuck in the milk and will make it to the baby. Luckily, the blood breaks down alcohol molecules. Enzymes in the blood break down the alcohol (the reason you don’t stay tipsy forever!), making the concentration of alcohol less in the blood.

As the alcohol concentration level in the blood decreases, a gradient exists again between the blood and breast milk, but in the opposite way. Now, alcohol MOVES OUT of breast milk, back to the blood, and is broken down by blood enzymes. This continues until all the alcohol is moved out of the breast milk and broken down in the blood. As you can imagine, by the end, all the alcohol molecules are broken down in the blood and none are left in the blood or breast milk.  This whole process takes about an hour or two per drink depending on each woman’s genetic ability to clear alcohol.


You have enough things to worry about.  Your time is precious.  Breast milk is precious.  Your baby is precious...most of the time. That’s why you’re reading a blog post (there's a high likelihood that you are nursing as you read this) to get permission to have that margarita!

Alcohol gets out of breast milk quickly and so there is no need to “pump and dump” if the mother limits her alcohol intake to one or two drinks and waits for 1 to 2 hours per drink to breastfeed or pump. The AAP agrees with my sentiment: modest alcohol intake does not preclude breastfeeding, and there should be as little inconvenience as possible to breastfeeding mothers to encourage exclusive breastfeeding.




Feel free to share this blog post (and maybe a nice pinot or pilsner) with a friend! 

Also, have you watched my sleep regression webinar yet? I cover four reasons babies go through sleep regressions and what to do for each!





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