Why is it Necessary to Boil Water When Preparing Your Baby's Formula?

We get it! We’ve been there!  If you're new to the idea of preparing formula for your baby, it can be a little confusing. There's so much information out there about how to do it properly--and some of it is contradictory! Just like if you need to boil water when preparing baby formula.

You might have heard some answers before from other parents or have read some answers from a parent group and probably have done what they suggested to boil or not to boil the water when preparing baby formula, but you are still curious. Should you or should you not?


Let’s then get to it clearly. 🙂
Because formula isn't considered sterile, the EU recommends mixing powdered formula with water that has been boiled and then cooled to 122°F (50°C).



Bacteria may be present in raw milk and need to be killed before feeding it to your baby.

You'll want to kill any bacteria that may be present in the raw milk before feeding it to your baby. This is because bacteria can cause infections, allergic reactions, and diarrhea—and sometimes even death.

Bacteria are present in all types of milk: human breast milk, cow's milk (whether it comes from a cow or a goat), etc. In fact, some people who are lactose intolerant can also have an intolerance towards certain strains of bacteria found in their own body fluids (like amniotic fluid).


It is critical that the milk be heated to at least 180°F

The temperature of the water is critical to the success of your baby's formula. It's important that the milk be heated to at least 180°F, which kills off any bacteria and other harmful substances that could make your child ill. If you don't heat your baby's formula enough, they won't get a good taste out of it!

In addition to this, you should also clean your bottle before and after each use. This will help prevent the buildup of bacteria and other harmful substances that could make your baby ill. The easiest way to do this is to run hot water through the bottle first and then dry it off before preparing or feeding your child's formula.

The boiling water changes the pH of the milk.

So what happens when you boil the water?

The boiling of the milk changes its pH, which affects its taste.

The optimum pH range for baby formula is between 4 and 7; if it's too acidic or too basic, then your baby won't be able to digest it properly. The reason why this matters so much is because there are many nutrients in breast milk that aren't found in formula (like vitamin C) and if those nutrients aren't digested properly by your baby then they won't be available for absorption into their bloodstreams.

Boiling water is necessary because it changes the pH level in milk, which makes sure that all harmful bacteria are killed off and not left behind in your bottle or cup!

If your baby's formula doesn't taste right, it may be because of an issue with the water.

If your baby's formula doesn't taste right, it may be because of an issue with the water. Boiling water kills all bacteria in a liquid, including those that can cause illness or disease. If you don't boil your baby's formula, you may get a bad taste from the milk and/or smell it differently than other families who use boiled-only water.


We hope that this article has been helpful in explaining why boiling water is necessary when preparing your baby's formula. While boiling water is a parental choice, we love our babies and want the best nutrition for them, so we try to make sure any food we feed them is safe and nutritious.

Author: Laura
👋 Hey,  I'm a proud mother of two wonderful children. I've been working at OBF24 for 6 years as a formula expert and am part of the customer support team. I love being able to help customers find the perfect formula for their little ones and provide support with any questions they may have. Drop me a message ›