01/18/2026
Have you ever read the back of your powdered formula can?
All powdered formulas include an important disclaimer: "powdered infant formula is not sterile and may pose a risk to premature infants or babies with weakened immune systems unless prepared under medical guidance. Improper preparation can cause serious harm, and prepared formula spoils quickly if not used or stored correctly."
One key risk is Cronobacter, a rare but potentially deadly bacteria found in dry foods like powdered formula, powdered milk, herbal teas, starches, and on feeding or pumping equipment. Infants under 3 months of age, premature babies born before 37 weeks or those with weakened immune systems are most vulnerable.
Contamination can occur during manufacturing or after the container is opened through contact with hands, surfaces, water, or equipment.
According to the Centers for Disease Control and Prevention (CDC): How to prepare a powder formula bottle
1. Wash your hands thoroughly with soap and water before preparing infant formula.
2. Clean and sanitize the area where formula will be prepared.
3. Clean and sanitize all bottles, ni***es, and feeding equipment before use.
4. Use water from a safe, reliable source when mixing powdered formula.
5. Bring the water to a rolling boil for one full minute using a stovetop or electric kettle.
6. Remove the water from heat and allow it to cool for at least 5 minutes but no longer than 30 minutes. Water that is too cool may not kill harmful bacteria, while water that is too hot can damage nutrients in the formula.
7. Follow the mixing instructions on the formula container exactly, carefully measuring the correct ratio of water to powder. Allow the prepared formula to cool further before feeding. Test the temperature by placing a few drops on your wrist. Never microwave a bottle. If warming with hot water, do not allow water to touch the ni**le or enter the bottle.
Prepared formula should be fed immediately or refrigerated at 35°–40°F and used within 24 hours.
Prevention tips:
• Breastfeed if you can for as long as your can
• Clean and sanitize bottles, ni***es, and pumping equipment after every use
• Always follow safe preparation and storage guidelines
Let’s talk about formula feeding safety and how proper preparation can help protect your baby.