ByHeart Infant Formula Botulism Outbreak Post-Investigation 2026: Root Cause Still Unidentified Despite Genetic Match to Milk Powder Supplier

The FDA and CDC declared the ByHeart infant formula botulism outbreak over on February 26, 2026 after 48 infants were sickened across 17 states. A June 10, 2026 Food Safety Magazine investigation reveals the root cause remains unidentified despite genetic matches to organic whole milk powder. New testing protocols are being implemented.