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Can you put already warmed breast milk back in the fridge?

The Guidelines on Storing Warmed Breast Milk
When it comes to the delicate process of storing and handling breast milk, new parents often find themselves navigating a maze of guidelines and recommendations. One common question that arises is whether warmed breast milk can be safely returned to the refrigerator. The answer is nuanced and hinges on several important factors.
Understanding the Risks of Bacterial Growth
Once breast milk has been warmed, it enters a critical phase where the risk of bacterial growth increases significantly. According to health experts, warmed breast milk should ideally be used within two hours of warming. If the milk has been warmed but not consumed, it can be returned to the fridge only if it has not been contaminated—meaning the baby has not fed from it. In such cases, it can be safely stored for up to four hours before it must be discarded .
The Importance of Hygiene
The primary concern with returning warmed breast milk to the fridge is the potential for bacterial contamination. If the baby has fed from the bottle, even if only a small amount, the milk should not be put back in the fridge. This is because bacteria from the baby’s mouth can proliferate in the milk, posing a risk to the baby’s health. Therefore, the general guideline is clear: once breast milk has been warmed and the baby has had contact with it, it should be discarded if not finished.
Consulting Professionals for Peace of Mind
For parents unsure about the best practices for handling breast milk, consulting with a pediatrician or a lactation consultant can provide tailored advice. These professionals can offer guidance based on individual circumstances, helping to navigate the complexities of breast milk storage and feeding.
Conclusion: Best Practices for Breast Milk Handling
In summary, while it is technically possible to refrigerate warmed breast milk under specific conditions, the safest practice is to use it promptly or discard it if there is any doubt about its safety. By adhering to these guidelines, parents can ensure that they are providing the best nutrition for their little ones while minimizing health risks.

Can you put breastmilk back in the fridge after warming?

You cannot refrigerate it again once it warms– it doesn’t matter the method. Increased temperature gives bacteria a chance to multiply. The time limits are generally what is thought to be of as safe levels.

What do you do with leftover warmed breast milk?

If baby eats often then just pop it back in fridge and reheat for the next feed. Or you can set it aside and use it for milk baths. Although there are so many different guidelines out there I will say that it’s up to you what you feel comfortable doing with your baby.

Can you put baby milk back in the fridge after warming?

If it’s been warmed up, just toss it. Warmed up milk cannot go back into the fridge.

Can I rewarm breast milk twice?

When it come to heating up breast milk, it’s generally recommended that you only reheat breast milk once, maybe twice. The reasoning for this is that each time you heat and cool the milk, it can potentially degrade the quality and nutritional value.

Can warmed whole milk be refrigerated again?

Whatever bacteria grew while it warmed up will still be there, and will continue to grow. Refrigeration only slows down the multiplication of bacteria.

How long can you leave breast milk out once warmed?

If you thaw breast milk in the refrigerator, use it within 24 hours. Start counting the 24 hours when the breast milk is completely thawed, not from the time when you took it out of the freezer. Once breast milk is brought to room temperature or warmed, use it within 2 hours.

Can you warm milk more than once?

Reheating milk more than once can increase the risk of bacteria growth and impact its nutritional value.

Can room temperature milk go back in the fridge?

Food can hang out in this zone for a bit, but after two hours, the risk of potentially harmful bacteria is significant. The clock rolls back to just one hour if the ambient temperature in the room is at 90 degrees F or higher — all to say, it’s imperative to get that milk back in the fridge as soon as possible.

What is the 5 5 5 rule for breast milk?

Something I recommend to moms is the 5-5-5 rule. Try and use milk within five hours at room temperature, five days in the fridge, and by five months in the freezer.

Can you reheat breast milk twice according to the CDC?

Never refreeze or reheat breast milk that’s been thawed, the CDC notes. If you’re not feeding baby immediately, keep defrosted breast milk in the fridge. If you thawed it at room temperature, the milk is good for up to two hours (after that, throw it out).

Natasha Lunn

Tash is an IBCLC and Business Coach helping fellow IBCLCs create fun, profitable businesses that are more than just an expensive hobby. Before becoming an IBCLC and starting her private practice - The Boobala, Tash graduated as an Osteopath in 2008 and has been in Private Practice in South West Sydney. She was also a volunteer Breastfeeding Counsellor and Community Educator with the Australian Breastfeeding Association for 6 years. Through her business, Your Lactation Biz, Tash coaches and creates products to help new and seasoned IBCLCs build businesses that suit their personality and lifestyle.

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