is it ok to mix formulas for babyPin

Mom’s Question:
I give my baby Similac but the daycare gives him Good Start. Is it ok to mix formulas like this or will it hurt my baby’s tummy? I am worried that he will get tummy pain or not get the nutrition right if the formulas are mixed. Is it a problem?


Easy Baby Life:

What Baby Formulas Can Be Mixed And Not

ok to mix baby formulasPractically all formulas sold today are good for your baby and contains the nutrition he or she needs. This, however does not mean that mixing them without some extra thougths will be OK.

There is a clear difference between mixing brands and mixing types of formula.

Mixing formula brands, but for similar types of formula, is not likely to be a problem as long as your baby accepts both brands – not to be taken for granted!

On the other hand, mixing formula types, can be a greater challenge. As you may know, there are many different kinds of formula, from the ordinary milk-based formula, to very specialized ones, such as hydrolysate formula and soy milk formula.

Many babies can, in theory, digest and thrive on all these different types, but since their digestive systems are immature during the first few months, staying with a type that works well is a reasonable choice. Also, many babies will object to the new taste of a different type of formula… Actually even switching to another brand, but the same type can make your baby protest (OR will make your baby finally accepting formula, if that’s a problem).

If your baby has tummy issues, such as a lot of gas, constipation, or even infant colic, then switching to a different kind of formula (for example lactose-free) can make a world of difference. In such a case, do not switch between different kinds once you have found one that works. It is even worth bringing your own formula brand and type to daycare, to make sure your baby gets what actually works.

For babies with cow’s milk allergy or lactose intolerance, the type of formula should not be switched, obviously.

So in conclusion, yes, you can mix formula brands without harming your baby as long as you do not notice feeding or pooping issues from the mix. Just make sure you know what type of formula you are feeding your baby and stay with a type that works for your child.

Find more discussions related to bottle-feeding here.

IS it OK to mix formulas – Conclusion

So, in short:

  • If your baby has NO tummy problems, NO allergies or intolerances, you can basically mix any formulas you want, a long as they are age appropriate. But there is no guarantee that your baby will approve the new taste.
  • If your baby does have certain issues and therefor some type of special baby formula, it is safe to mix similar formulas by different brands, but NOT different types of baby formula.
  • It at all in doubt, talk to your baby’s health care provider.

Hope this helps,


Find comments below.



Dec 06, 2019 It is okay
by: Rose
It is okay, but your baby may develop a taste for a certain formula, what is the reason behind the day care giving a different kind of formula. Just make sure that if your child does have a sensitive stomach that the formula that they are giving him at day care is not causing him any discomfort.

Dec 10, 2019 You can, but….
by: Anonymous
You can mix baby formulas, but many babies are not very tolerant of it and develop upset stomachs. A better idea would be to send your regular formula along with your child to daycare!

Dec 10, 2019 not recommended
by: Anonymous
It is NOT recommended to switch formulas like that. Constantly switching can increase the risk of childhood allergies, also can cause constipation in your little one. Why not pack formula for your baby to take to daycare?

Aug 29, 2020 Formula Usage
by: Anonymous
My son is 11 months old and we have some formulas that were sent to us other than his Similac Advance….Good Start Surpreme with Iron. Would it be ok to use that to save a little money for the next couple of weeks?

Sep 28, 2020 Mixing baby formulas
by: Anonymous
Unintentionally I found myself mixing baby formulas together. I’m not sure if it is harming my baby or not! I first (when he was a newborn) started with Nestlé which was quite expensive, but I kept using it until he reached his third month, then I switched to a cheaper brand from Milupa which was still expensive, then I changed to a third kind which is also very good (Hipp) yet with a relatively reasonable price!
Now my child is 4 months old. Today, I received a present a bag full of Nestlé “Beba”, Milupa and Adapta. I’m planning to feed him on them. Is it ok? I started today, after his last meal he cried a bit but otherwise he was playing. I know it might sound crazy.. Yet any advice?

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This Post Has 2 Comments

  1. Tamara

    I use one bottle of enspire gentlease and good start lactose free, my baby couldn’t poop so good but the enspire helped my baby gain weight but couldn’t poop once I use both he’s gaining and pooping but i don’t know if it’s healthy

  2. JCMx193

    That’s the same exact problem I had. My son is 6 months old now. The gentle ease constipated him and the reguline gave him diarrhea. Reguline has dual prebiotics:gentle ease does not have any prebiotics. Reguline has lactose:gentle ease has reduced lactose(replaced with corn syrup). Since they are both made with similar formations(partially hydrogenated non fat milk and whey protein concentrate) it’s ok to mix them just gotta figure out how much of each works for him. I mixed his morning feed (half Reguline half gentleease) and also gave him 1 ounce of water with probiotics in it. The rest were gentle ease. It helped him out and didn’t cause stomach upset. That worked for a couple months but hard poos came back so switched him to Gerber Good start SOOTHE not the gentle the gentle made him have crazy gas lol. That worked for a few months now at 6 months old we’re dealing with the same issue again. Enfamil and Gerber formulas contain PALM OLIEN which has been proven to cause hard stools bc it is not digested fully. Similac is one of the only brand name formulas that don’t contain Palm OLIEN. Similac total comfort worked great for relieving his hard poops but he broke out in a rash on his face(he has infant eczema also) so now he’s on the Similac Sensitive and it’s only been a couple days so gotta give it at least 2weeks. Hoping this works for him fingers crossed. Hope this helped you out.