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Can I mix formula and breastmilk in one bottle?

Mixing Formula and Breast Milk: What You Need to Know
For new parents navigating the world of infant feeding, the question of whether to mix formula and breast milk in the same bottle often arises. The good news is that it is indeed possible to combine the two, but there are important considerations to keep in mind to ensure the safety and health of your baby.
Safety and Preparation
Experts agree that mixing breast milk and formula can be done safely, provided that it is prepared correctly. The Centers for Disease Control and Prevention (CDC) suggests a specific method: first prepare the formula as you normally would, and then add the breast milk to the bottle. This approach helps maintain the integrity of the breast milk while ensuring that the formula is properly mixed.
It’s crucial to remember that once a bottle is opened, the contents should be consumed within a certain timeframe. Formula typically spoils after one hour once a baby starts feeding, while breast milk can last up to two hours at room temperature. This means that if you mix the two, you should be mindful of how long the bottle remains out and how much your baby consumes.
Considerations for Mixing
While mixing is permissible, some experts recommend feeding breast milk and formula separately. This method can help minimize waste, especially since breast milk is often considered more valuable due to its nutritional benefits. If your baby does not finish the bottle, you may prefer to save the breast milk for another feeding rather than risk wasting it.
Additionally, some parents find it beneficial to feed breast milk first and then follow up with formula. This strategy not only ensures that the baby receives the breast milk but also allows for any necessary supplementation without compromising the quality of the breast milk.
Conclusion
In summary, mixing breast milk and formula in one bottle is a viable option for parents looking to supplement their baby’s diet. However, it is essential to follow safe preparation guidelines and consider the timing of feedings to avoid waste. By being mindful of these factors, parents can confidently navigate the mixed feeding journey, ensuring their little ones receive the best nutrition possible.

Why is mixed feeding not recommended?

If your mixed feeding involves exchanging some breastfeeds for baby formula, then your baby will not receive as many benefits as they normally would if they were exclusively breastfed. As such, their immune system may not be as well protected from certain infections1.

Why wait 30 minutes before making formula?

Leave the water to cool in the kettle for no more than 30 minutes. Then it will stay at a temperature of at least 70C. If you’re using a baby formula preparation machine, make sure the water is at least 70C. Water at this temperature will kill any harmful bacteria.

Is formula more filling than breast milk?

Because formula is less digestible than breast milk, formula-fed babies usually need to eat less often than breastfed babies.

Can you go back and forth between breastmilk and formula?

It can take several weeks for you and your baby to feel happy and confident with breastfeeding. Once you’ve both got the hang of it, it’s usually possible to offer your baby bottles of expressed milk or formula alongside breastfeeding. This is sometimes called mixed or combination feeding.

Is 4 oz of breastmilk the same as 4 oz of formula?

Try not to compare the amount of breastmilk in a bottle to formula in a bottle because they will mostly likely be different. Breastfed babies typically eat less at a feeding because breastmilk has more nutrients per ounce, and babies digest breastmilk more fully than formula.

Is it okay to formula feed at night and breastfeed during the day?

It’s absolutely fine but if you’re wanting to eventually exclusively breastfeed, you may want to pump during those replacement feeds. Your supply naturally dips in the evening/overnight, so that could be why you feel she’s hungrier.

Can I give my baby milk I pumped at night during the day?

The milk’s unique composition may help to tell day from night. Milk given to babies at a different time to when it was pumped could affect the development of their circadian rhythm. Human breast milk is more than a meal – it’s also a clock, providing time-of-day information to infants.

Is it a good idea to mix formula with breast milk?

Breast milk and formula don’t have to be mutually exclusive. Babies can thrive on breast milk, formula, or a combination of both. Keep them separate, mix them together, nurse, pump, and find what works for you and your baby.

Can mixing breastmilk and formula cause gas?

Because breastmilk is easy to digest, you may notice an increase in baby toots when supplementing with formula. Plus, babies can be sensitive to lactose or milk proteins in formula, which may cause gassiness.

Can I mix breast milk and formula in the same bottle?

Combining breast milk and formula can be a great help to a mom heading back to work, one with a low supply or one trying to nurse multiples. And mixing breast milk and formula in one bottle can be the most convenient way to combo feed, since you’ll wash fewer bottles.

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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