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Bottles & Formula

Is It Okay to Switch Formula Brands?

May 11, 2026

Key takeaways: All infant formulas sold in the U.S. must meet FDA nutrient requirements, so switching between similar standard formulas, including store brands, is generally fine. Most babies adjust without a slow transition. Talk to your doctor before switching to or from a specialized formula, such as hypoallergenic or preterm formula.

Many parents worry about changing formula. Usually, it’s not a big deal.

Why All Standard Formulas Are Similar

In the U.S., infant formulas must meet nutrient requirements set by the FDA under the Infant Formula Act. Store brands and name brands both meet these standards. The AAP notes that generic formulas are a safe, less expensive option.

Reasons Families Switch

  • Cost.
  • Availability or shortages.
  • Insurance or WIC changes.
  • Concerns about fussiness or spit-up.

How to Switch

  • Most babies can switch directly from one standard formula to a similar one.
  • Some families mix the old and new formulas (each prepared correctly) over a few days. There’s no strong evidence this is necessary.
  • Never mix powders together in unusual ratios or dilute formula to “stretch” it.

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.

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Expect Small Changes

Stool color, smell, or consistency may change a little. Many babies have no change at all.

Frequent Switching for Fussiness

Fussiness and gas are common in all babies. Switching formula over and over rarely helps and can make it harder to figure out what’s going on. Talk to your doctor before trying specialty formulas.

When to Ask First

  • Your baby uses a hypoallergenic formula (extensively hydrolyzed or amino acid-based).
  • Your baby was born preterm and uses a preterm or transitional formula.
  • Your baby has a medical condition.
  • You’re thinking about soy formula.

Formulas to Avoid

  • Homemade formula.
  • Toddler formulas for babies under 1.
  • Imported formulas not approved for sale in the U.S., unless approved by the FDA.

Call your baby’s doctor if your baby: has blood in the stool, vomits often or forcefully, has hives or swelling, isn’t gaining weight, or seems in pain after feeds.

The Bottom Line

Switching between standard formulas is generally safe. Ask your doctor before changing specialized formulas.

Want more support for your baby’s first year? My book, From First Breath to First Birthday, is available on Amazon.

Related Articles

Sources

  1. U.S. Food and Drug Administration. Infant formula: questions and answers. https://www.fda.gov
  2. American Academy of Pediatrics. Is it OK to switch baby formula brands? HealthyChildren.org. https://www.healthychildren.org
  3. Abrams SA, Daniels SR. Protecting vulnerable infants by ensuring safe infant formula use. J Pediatr. 2023;256:5-6.

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.

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