Powdered whole milk used in the production of ByHeart infant formula has been identified as a potential source of contamination leading to an outbreak of botulism among infants, according to U.S. health officials. The U.S. Food and Drug Administration conducted testing that revealed the presence of bacteria known to cause botulism in samples associated with the formula.
The FDA discovered that the bacteria found in an unopened can of formula matched the strain present in a sick infant. Furthermore, the contamination was also detected in samples of organic whole milk powder utilized in the production of ByHeart formula, which were tested by the company. Additional testing by the FDA revealed contamination in a sample of whole milk powder supplied to ByHeart, which corresponded to the bacteria found in a finished sample of the formula.
Although these findings are not definitive, the investigation is ongoing to pinpoint the exact source of the contamination. ByHeart officials acknowledged the discovery as a significant step towards identifying the root cause of the issue. The supplier of the powdered whole milk was not disclosed by either the FDA or ByHeart.
Despite the current situation, there is no indication of a widespread problem within the infant formula supply chain, as per the FDA statement. ByHeart, based in New York, has been the focal point of a botulism outbreak that has affected 51 infants across 19 states since December 2023. The problem came to light in November when a surge in botulism cases was observed in babies who had consumed ByHeart formula.
No new cases related to the outbreak have been reported since mid-December, according to the U.S. Centers for Disease Control and Prevention. Initially, ByHeart recalled two lots of formula, which was later expanded to include all products. Federal health officials expressed concerns about potential contamination in all products manufactured by the company since its inception in March 2022.
Experts in food safety emphasized the rarity of illnesses caused by botulism bacteria in infant formula and noted the unprecedented scale of the ByHeart outbreak. While some formula companies conduct testing on raw materials and finished products for contamination, there are calls for mandatory testing by regulatory authorities.
Regardless of whether the contamination can be traced back to a milk supplier, ByHeart remains accountable for the harm caused by its product, according to food safety lawyer Bill Marler. The company, which previously held a small share of the U.S. infant formula market, marketed its product as a close alternative to human breast milk, emphasizing the use of organic, grass-fed whole milk.
Parents who opted for the ByHeart formula, priced at around $42 per can, based their decision on the perceived health benefits. Legal and moral responsibilities remain with ByHeart, despite potential findings regarding the contaminated ingredient. The company’s sales figures and marketing claims have come under scrutiny in the wake of the botulism outbreak.
In conclusion, the ByHeart infant formula contamination incident serves as a cautionary tale highlighting the importance of stringent quality control measures in the production of infant nutrition products. Ongoing investigations and regulatory actions are essential to prevent similar outbreaks in the future.

