ByHeart Safety & Education Hub

The latest updates and recall information


CDC and FDA Declares Outbreak Over; Ongoing Investigation Identifies Additional Matching Samples

Date: February 26, 2026

On February 26, 2026, the CDC and FDA announced that the infant botulism outbreak has ended, with no new cases reported since December. We are grateful to hear this news, but there’s still much more to do. We take our responsibility to ByHeart families incredibly seriously, and we are deeply sorry for the impact this outbreak has had on our community.

FDA’s investigation into the root cause of the contamination is still ongoing, and we continue to cooperate fully. The FDA continues to share significant progress. In its February 26th update, the FDA announced that whole genome sequencing (WGS) analysis confirmed two new samples from one lot of Organic Whole Milk Powder, collected by FDA from a supplier, match a previously identified ByHeart formula sample and a sample from a sick infant. More detail on FDA’s findings can be found here.

As we await further developments in the investigation, we are working in parallel to take what we’ve learned from the investigation to develop a comprehensive action plan to prevent this from happening again. This plan includes implementing new, enhanced safety and testing protocols for ingredients and finished products, identifying new suppliers for certain ingredients, enhancing supplier standards, and establishing an independent Food Safety Council to validate our protocols and help anticipate future risks.

The CDC and FDA update marks the end of the outbreak, but for us, our work to develop new standards, going further beyond industry standards to pioneer a new model for safety, is not over. We are moving forward with the same determination that built ByHeart, because that is what parents deserve. We will continue to be transparent and will share more information on our enhanced safety measures as we move forward.

Recall Status

All batches of ByHeart infant formula, and all products including cans and Anywhere Pack sticks nationwide, were recalled as of November 11, 2025. 

We have paused all production of ByHeart products, as well as all marketing, advertising and influencer partnerships, and continue to direct our resources toward supporting families and the root cause investigation. Additional testing across ingredients, manufacturing processes, and handling procedures remains underway and we continue to cooperate fully with regulatory agencies.

ByHeart is providing a full refund for all products purchased on ByHeart.com on or after August 1, 2025. Please email us at hello@byheart.com and our team will assist you. For customers who purchased ByHeart products at retail stores, that retailer will handle your refund. We encourage customers to contact retailers directly to process their refunds.

Timeline of Key Events

Feb. 26, 2026

CDC and FDA Declare Outbreak Over; Investigation Continues

CDC and FDA announced that the infant botulism outbreak had ended, with no new cases reported since December. FDA also confirmed that whole genome sequencing identified a match between two additional samples from a supplier lot of Organic Whole Milk Powder, a previously identified ByHeart formula sample, and a clinical sample from a child with infant botulism. FDA’s investigation into the root cause continues, and so does our work to learn from this outbreak. 

Jan. 23, 2026

Root Cause Investigation Update

FDA shared a significant finding: genetic matches between two positive samples of C. botulinum Type A – one from ByHeart infant formula, and one from a sample of Organic Whole Milk Powder collected by FDA from our suppliers. This was a meaningful step forward. While the investigation was not yet complete, the evidence was continuing to point toward the ingredient supply chain.

December 2025

Additional Cases; Investigation Deepens

FDA and CDC identified additional infant botulism cases linked to the outbreak. 
IEH Laboratories, our independent food safety partner, also confirmed the presence of C. botulinum, the bacteria that causes infant botulism, in six of 36 finished product samples across two recalled batches. Whole genome sequencing, a highly precise genetic matching technique, conducted by IEH confirmed those results conclusively. The data was beginning to point us toward a source.

Nov. 19, 2025

Positive Test Results in Unopened Cans

ByHeart’s testing confirmed the presence of C. botulinum in unopened cans of ByHeart formula. This was a critical and sobering finding. It told us the contamination had occurred before the product reached families. This helped inform the investigation and deepened our resolve to find the source.

Nov. 7 – 11, 2025

Initial Notification and Full Recall

When the FDA notified us of a potential link between our formula and cases of infant botulism on November 7, we issued a voluntary recall of two batches within 24 hours and treated this with the urgency it demanded of us. Our team and resources were immediately directed to investigating what happened, working in full coordination with the FDA and regulators.

As the investigation developed quickly, we expanded that recall to include all ByHeart products and paused all production – notifying retailers and stakeholders in lockstep with regulatory guidance. Families who had trusted us, many of whom had chosen ByHeart because of our safety standards, were understandably upset. Getting answers was challenging, and some of our early communications made a frightening situation worse instead of better. This didn’t reflect our values of providing the care and clarity that families deserve and we resolved to make meaningful efforts in transparency as the investigation continued.

2016

Why We Started

ByHeart was founded because we believed babies deserved better. Better ingredients, better science, and a higher standard of care built from the ground up. We spent years getting that right before a single can ever reached a family. That mission is the same today as it was then. The November 2025 recall has made it even more urgent.

Our Guiding Experts

Our Third Party C. botulinum Advisors

We have brought together respected third-party laboratories and experts to collaborate on a comprehensive root cause investigation into the presence of Clostridium botulinum in ByHeart infant formula products. This investigation team includes IEH Laboratories, a premier regulatory consultancy of ex-FDA experts, and subject matter experts, Dr. Kathleen Glass and Dr. Eric Johnson.

We’re here with support.
Please email us at hello@byheart.com


As parents ourselves, we understand how difficult this recall has been. For support, please email us and our Parent Experience team will assist you.

Investigation FAQs

While the FDA’s investigation is ongoing, the latest updates about the whole milk powder that we source suggests that we are significantly closer to determining the root cause of the contamination of ByHeart formula.

FDA has shared their lab analysis and found genetic matches involving two positive samples of C. botulinum Type A collected by FDA: the first is a sample of ByHeart infant formula, and the second is a new sample of whole milk powder, collected by FDA from a supplier to ByHeart. 

These findings from FDA are consistent with the whole genome sequencing (WGS) analysis conducted by ByHeart at IEH Laboratories. These WGS sequences represent a second concrete genetic match between the whole milk powder ingredient, finished ByHeart formula, and a clinical sample from a child with Infant Botulism from this outbreak. 

Our investigation has included a detailed examination of our facilities, processes and supply chain – from farm-level ingredients, to every piece of equipment at our owned facilities, through to the final finished product. 


The investigation remains underway and we will provide new information as we learn more.

We remain committed to finding the facts and evidence about what led to the contamination of ByHeart products. We continue to work in cooperation with FDA to share new results from our ongoing investigation, which has included a detailed months-long examination of our facilities, processes and supply chain – from farm-level ingredients, to every step and piece of equipment of our owned manufacturing process, through to the final finished product.

ByHeart continues to test ingredients. We will provide updates on the conclusion of the investigation when we learn more.

At this time, testing for C. botulinum is not the industry standard. Instead, the industry (including regulators) relies on preventive controls, validated processing steps, and indicator tests, like SRC, to ensure stricter supplier selection and qualification. 

We are working with our lab testing partner at IEH on new testing protocols for C. botulinum from farms, to supplier facilities, to our factories. Even though testing on the whole milk powder we received from suppliers exceeded industry and regulatory standards, we now know that the existing safeguards are insufficient. This outbreak revealed that this pathogen can make its way into the infant formula supply chain. Going forward, we are committing to instituting new testing protocols and conducting third-party testing for C. botulinum on every batch of our finished infant formula and throughout our supply chain.

To complement this enhanced testing, we are evaluating a comprehensive set of additional preventative controls throughout our supply chain and manufacturing process to further safeguard risk posed by C. botulinum or other spore-forming bacteria. We will share further details as these are finalized.

All ByHeart suppliers must meet rigorous approval criteria designed to ensure the highest standards of safety, quality, compliance, and transparency. 

The process begins with supplier pre-screenings, including evaluation of the company’s relevant certifications (such as SQF, BRCGS, or ISO), regulatory compliance, and alignment with ByHeart’s strict quality and food safety standards.

Qualified suppliers then undergo a comprehensive audit, including but not limited to a detailed review of pre-requisite programs, standard operating procedures, food safety and allergen control plans, environmental monitoring programs, heavy metal and contaminant testing policies, and  detailed product specifications and certificates of analysis covering origin, analytical testing, and microbiological testing. 

Suppliers are also assessed on sustainability and traceability practices, including ESG programs, and are classified through a detailed risk assessment. 

ByHeart also conducts regular onsite or virtual audits to verify program execution, identify gaps requiring corrective actions and to ensure continued adherence to ByHeart’s stringent requirements.

ByHeart has extensive supplier specification in place covering milk products. This includes more stringent specifications that cover pathogens (B. cereus, Staphylococcus, E. coli and Salmonella), spores (total spore count & SRC), and hygiene indicators (Enterobacteriaceae and coliforms). 

ByHeart also qualified for the Clean Label Project’s First 1,000 Day Promise Certification, meeting the most strict compliance requirements, inclusive of rigorous testing for pesticide, glyphosate, heavy metal, plasticizers, and prohibited ingredients. 

We hold our ingredients to stringent limits for each specification.

ByHeart ensures ingredients are not contaminated after arrival through multi-layered controls designed specifically for infant safety. 

Upon arrival at our production sites, shipments undergo strict security checks and anything of concern is immediately quarantined. 

Ingredients remain on hold while documentation, such as Certificates of Analysis, lot codes, and specifications, are verified, packaging and labeling are inspected, and third-party laboratory testing is completed for identity, nutrients, and microbiological safety. 

Once reviewed and approved by our Quality team, ingredients are stored under controlled environmental conditions, and they are further protected by validated sanitation programs, environmental monitoring, foreign material controls, and full lot-level traceability throughout manufacturing and packaging.

Yes. ByHeart maintains a robust Supplier Approval Program (SAP) aligned with FDA requirements and industry best practices.

The Supplier Approval Program is a process used to assess, approve, and continually monitor their ingredient, packaging, and service suppliers to ensure they meet safety, quality, and regulatory requirements. 

This ensures all suppliers providing goods or services meet both regulatory standards and ByHeart’s standards for quality, safety, compliance, reliability, consistency and ethical practices before entering into or continuing a business relationship. 

This framework is designed to mitigate risk, protect consumers, and support consistent operational excellence.

Based on the root cause investigation, our immediate focus is on creating and implementing enhanced testing and comprehensive preventative controls throughout our supply chain and manufacturing process to further safeguard risk posed by C.botulinium or other spore-forming bacteria.

Even though testing on the organic grass-fed whole milk powder we received from suppliers exceeded industry and regulatory standards, we now know that the existing safeguards are insufficient. This outbreak revealed that this pathogen can make its way into the infant formula supply chain. Going forward, we are committing to instituting new testing protocols and conducting third-party testing for C. botulinum on every batch of our finished infant formula and throughout our supply chain.

To complement this enhanced testing, we are developing a comprehensive set of additional preventative controls throughout our supply chain and manufacturing process to further safeguard risk posed by C.botulinium or other spore-forming bacteria. We will share further details as these are finalized.

At this time, we are not naming specific suppliers we work with. We do not have visibility into who else they may be working with outside of ByHeart.

Additional FAQs

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