Key takeaways: All three forms of infant formula meet the same FDA nutrient requirements. Powder is the least expensive but isn’t sterile, so newborns, preterm babies, and babies with weak immune systems may benefit from ready-to-feed. Concentrate is mixed with an equal amount of water. Always follow the label exactly.
Infant formula comes in three forms. Each meets the same nutrition standards, but they differ in cost, convenience, and safety for certain babies.
Powdered Formula
Pros:
- Least expensive.
- Lightweight and easy to store.
- Lasts longer once opened (usually about 1 month; check the label).
Cons:
- Must be measured carefully.
- Not sterile. Powdered formula can rarely contain Cronobacter bacteria, which can cause serious infections in young babies.
Liquid Concentrate
Pros: easier to mix than powder; sterile until opened.
Cons: more expensive; must be mixed with an equal amount of water, exactly as the label says; must be refrigerated after opening and used within 48 hours (check the label).
From the author
From First Breath to First Birthday is my month-by-month guide to your baby’s first year, written as a NICU and postpartum nurse. My book walks you through feeding month by month, from the first days home to the first birthday, with the warning signs that mean it’s time to call the doctor.
Ready-to-Feed
Pros: no mixing, sterile until opened, convenient for travel and night feeds.
Cons: most expensive; bulky; refrigerate after opening and use within 48 hours (check the label).
Which Babies May Benefit From Ready-to-Feed?
The CDC suggests that for babies younger than 2 months, babies born preterm, and babies with weakened immune systems, you may want to use ready-to-feed or liquid formula, or take extra steps when preparing powder.
Extra Steps for Powder
The CDC advises, for babies at higher risk:
- Boil water and let it cool to no less than 158°F (70°C) before mixing, which kills germs.
- Cool the bottle quickly to body temperature before feeding.
- Use within 2 hours, or refrigerate right away and use within 24 hours.
Mixing Safety
- Never add extra water or extra powder. Wrong concentrations can cause serious health problems.
- Use the scoop that comes with the formula.
- Wash hands and clean surfaces before preparing.
The Bottom Line
All forms meet nutrition standards. Choose based on your baby’s age and health, cost, and convenience, and always prepare formula exactly as directed.
Want more support for your baby’s first year? My book, From First Breath to First Birthday, is available on Amazon.
Related Articles
Sources
- Centers for Disease Control and Prevention. Infant formula preparation and storage; Cronobacter and infant formula. https://www.cdc.gov
- U.S. Food and Drug Administration. Infant formula: questions and answers. https://www.fda.gov
- American Academy of Pediatrics. Formula feeding: how to prepare. HealthyChildren.org. https://www.healthychildren.org
This article is for general education and is not a substitute for individualized medical advice. Always talk with your baby’s health care provider or your own provider about your specific situation. If you think your baby or you may have a medical emergency, call 911.
