A 39-year-old female asked:

I have a 3 week old baby. since yesterday i have changed his formula from s26 gold to nan as he seemed to be cramping. how long do i give the new formula to test if it is working?

1 doctor answer3 doctors weighed in
Dr. Yvette Kratzberg
Pediatrics 26 years experience
Gradual transition: Any commercially available formula is adequate for feeding. Transfer slowly, over 2 weeks or so. Lessen the one formula each session while giving more and more or the other formula until the baby is on only new formula. You should try for at least 2 months after the transition is complete. You should notice less cramping and gas.
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Last updated Feb 28, 2021


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