That trust was shaken in November 2025 when federal health officials announced a nationwide recall of ByHeart Whole Nutrition Infant Formula, after 15 infants across Arizona, California, Illinois, Kentucky, Minnesota, New Jersey, North Carolina, Oregon, Pennsylvania, Rhode Island, Texas and Washington were hospitalized with a rare illness most people have never though of: infant botulism.

The Centers for Disease Control and Prevention (CDC) and the Food and Drug Administration (FDA) confirmed that all affected babies had consumed the same brand before falling ill. Every infant survived, but all required hospitalization and treatment with BabyBIG, a specialized immune globulin that neutralizes botulinum toxin.

At first, the company recalled only two lots – 206VABP/251261P2 and 206VABP/251131P2. But when more cases surfaced from different batches, ByHeart voluntarily expanded the recall to every lot nationwide – including unopened products sold online and in stores.

What exactly is infant botulism?

According to the CDC, infant botulism occurs when babies ingest dormant spores of Clostridium botulinum – a bacterium found everywhere from garden soil to household dust. In adults, those spores pass harmlessly through the body. But an infant's immature digestive system provides the perfect low-acid environment for the spores to wake up, grow and release botulinum toxin, one of the most powerful poisons known.

That toxin interferes with nerve signals to the muscles, leading to progressive, descending paralysis. It usually begins subtly: constipation, a weak cry, poor feeding (sucking and swallowing). Then come drooping eyelids, floppy limbs and, in severe cases, respiratory failure.

Doctors describe affected babies as "floppy but alert." Their minds are fine, but their muscles stop listening. If untreated, paralysis can spread until breathing muscles fail. Prompt treatment with BabyBIG dramatically shortens recovery and reduces the need for mechanical ventilation.

Clostridium botulinum isn't new or man-made – it's part of nature's microscopic landscape. Environmental studies published in the journal Current Microbiology (2024) found its spores in about 13 percent of soil and sediment samples worldwide. They've been isolated from honey, herbs and even fresh product. Because the spores are everywhere, the source of infection in most infant botulism cases is never found.

Honey has long been the only well-known risk factor, which is why pediatricians advise never feeding honey to babies under one year old. Before now, powdered infant formula was considered extremely low-risk. The Codex Alimentarius Commission, which guides global food standards, doesn't list C. botulinum as a typical hazard for formula production. The last confirmed link between formula and infant botulism occurred nearly two decades ago – in 2005 in the United Kingdom.