In brief
Health officials are currently examining over 30 cases of infant botulism related to ByHeart baby formula, with reports from parents indicating that other cases may have occurred months earlier than the current outbreak. Despite the health department stating they cannot link these cases to the present outbreak, affected parents are pressing for answers and transparency. With the CDC now involved, an ongoing investigation aims to clarify the source of the incidents and the potential dangers regarding baby formula safety.
As health officials investigate more than 30 cases of infant botulism associated with ByHeart baby formula since August, parents of infants who suffered from botulism months before the outbreak are seeking answers.
California health authorities confirmed six infants in the state were treated for botulism after consuming the ByHeart formula between November 2024 and June 2025, prior to the current wave affecting at least 31 babies across 15 states.
While officials assert there is insufficient evidence to link earlier cases to the ongoing outbreak, parents believe there is a connection. Bill Marler, a food safety lawyer representing families, shared reports from parents of five babies who were similarly treated for botulism after using ByHeart formula.
Amy Mazziotti of California recounts her infant son Hank who fell ill in March after starting ByHeart formula.
Katie Connolly from Lafayette highlighted her daughter M.C.'s hospitalization for botulism in April after consuming the same formula. These mothers had previously struggled to trace the source of their children's illnesses.
In November, ByHeart recalled all of its baby formula products in light of increasing botulism cases, leading to Mazziotti's realization of a potential link.
Lab tests have since confirmed that some unopened products contained contamination associated with the botulism bacteria. Despite the rising incidents, officials stress the focus remains on understanding the steep increase in cases observed after August.
Dr. Jennifer Cope of the CDC emphasized the necessity of addressing the striking spike in infections documented post-August, while acknowledging earlier cases must also be examined if they involved ByHeart formula.
Calls for inclusion of earlier botulism cases in the current outbreak data are growing stronger among parents, health experts, and food safety advocates, who emphasize the urgency of recognizing the problem for affected families. Patients suffering from botulism experience severe symptoms that demand ongoing treatment and care.
Mazziotti and Connolly, while noting improvements in their children, stress their need for greater clarity in causes of these conditions and detailed answers from health authorities to avoid future occurrences.
