A very serious outbreak of infant botulism occurred in the United States and we are still trying to clarify what happened. As the FDA and CDC report, 13 newborns in 10 American states have been hospitalized, all with worrying symptoms. What caused this is not yet clear, but the cases have been linked to two batches of ByHeart Whole Nutrition Infant Formula.
Inevitably, the company has initiated a voluntary recall of the affected batches, while health authorities investigate whether there is a direct link between the formula and cases of botulism.
What happened
Between August and November 2025, thirteen children – some just two weeks old, others five months old – began to show disturbing symptoms: feeding difficulties, progressive muscle weakness, loss of head control, weak crying. Signs that doctors have recognized as compatible with infant botulism.
All these little patients had one thing in common: they had been fed with ByHeart infant formula, in particular with two lots expiring in December 2026 (Lot: 206VABP/251261P2 and Lot: 206VABP/251131P2).
The most worrying aspect is that symptoms can appear even several weeks after ingestion of the contaminated product, requiring parents to be constantly vigilant. Fortunately, despite the severity of the cases and the fact that all thirteen children were hospitalized, no deaths have currently been recorded.
What is infant botulism and why is it so scary
Infant botulism is an insidious disease caused by spores of the bacterium Clostridium botulinum. When these spores colonize the newborn’s intestine, they produce a very powerful toxin that causes progressive muscle paralysis, compromising the ability to feed, breathe and move.
What makes this incident particularly serious is the fact that there is no precedent for infant botulism outbreaks linked to commercial formula in the United States. It is an unprecedented event that raises important questions about the safety of products intended for newborns and the effectiveness of quality controls along the entire production chain. Provided that the actual responsibility of the formula milk is verified.
The recall
After the FDA recommended that the company carry out a voluntary recall, on November 8, 2025 ByHeart Inc. began recalling the two offending lots. The company has invited all parents not to use these products and to dispose of them immediately or return them to the point of sale.
The health authorities were clear: every bottle, utensil or surface that has come into contact with the recalled milk must be washed carefully with hot water and soap. And above all, parents must pay close attention to any suspicious signs in their children.
If an infant who has consumed this milk experiences difficulty feeding, loss of muscle tone, problems swallowing, or weak, impaired crying, it is essential to seek medical attention immediately. Time is precious: early treatment with antitoxin can make a difference.
The questions still unanswered
The investigation is still ongoing and many questions remain open. Where exactly did the contamination occur? Why only these two specific lots? Are there other products potentially at risk? Authorities are analyzing samples of formula collected from the homes of affected families, but the results are not yet available.
ByHeart Whole Nutrition infant formula represents less than 1% of all infant formula sales in the United States, so this recall should not create shortage issues for families. However, the emotional impact and loss of trust could be significant.
Sources: FDA / CDC
