Can I mix breast milk and formula?

Ummi selalu came accross queries on 'boleh tak mix breastmilk with FM?'

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Expert Answers

Jan Barger, lactation consultant
While there's nothing wrong with mixing breast milk and formula in the same container, it's not recommended simply because you don't want to waste a single drop of your precious breast milk. Formula from a bottle that your baby has drunk from must be discarded within an hour of preparation. Breast milk, on the other hand, will "keep," refrigerated, for a number of hours in a bottle that's been fed.

So, for example, if you mix 2 ounces of expressed breast milk with 2 ounces of formula, and your baby only drinks 2 ounces altogether, you'll have to throw the leftovers out, wasting some of the breast milk. To avoid this kind of waste, a good plan is to feed your baby whatever breast milk you've expressed, and then follow that up with couple of ounces of formula if you need it.

Some mothers mix powdered formula with their breast milk in order to increase the calories their baby gets during a feeding. Please do not do this! Not only does it change the composition of the breast milk, but the micronutrients in the formula will become so much more concentrated that it can be very hard on your baby's immature kidneys. Always follow the exact directions on the can of powdered or concentrated formula, and never mix formula with anything but distilled water.


  1. based on my experience, once baby dah campur susu formula, slow2 dia takmo dah EBM

  2. sweet,

    maybe tgk pada baby gak kut
    sbb one of my kolig mix feeding her baby till 2 tahun...tapi bukanla mix in 1 bottle

    tapi selagi ada breastmilk, bagilah breastmilk kan...very2 da precious

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