The a2 Milk Company is voluntarily recalling three batches of its a2 Platinum Premium infant formula sold in the U.S. after testing detected cereulide, a toxin produced by some strains of the bacterium Bacillus cereus.

Of the 63,078 tins of a2 Platinum Premium Infant Formula 0-12 months covered by the recall — a 31.7oz product sold under a USA label — roughly 16,428 made it to consumers, according to the company. The product was distributed through a2 Milk's website, Amazon $AMZN, and Meijer stores as part of Operation Fly Formula.

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The three affected batch numbers are 2210269454, 2210324609, and 2210321712, with use-by dates of July 15, 2026, Jan. 21, 2027, and Jan. 15, 2027, respectively. The batch number and expiration date appear on the bottom of each tin.

Cereulide is a heat-stable toxin, meaning preparing formula with hot water does not eliminate it, the company said. Symptoms typically appear within 30 minutes to six hours of ingestion and most often involve nausea and vomiting that resolve within 24 hours. Infants face greater risk due to their developing immune systems and can experience complications such as dehydration requiring medical care.

The company said it has not received any confirmed reports of illness or injury. The company said consumers should stop using the product and dispose of it or return it for a refund. Parents whose infants show symptoms should contact a health care provider.

New guidelines published by New Zealand's Ministry for Primary Industries in mid-April prompted Synlait to run additional tests, which turned up the cereulide that set the recall in motion, according to Bloomberg. The probable source of the toxin is an ingredient in the affected product, the company said. The formula was manufactured by a2 Milk's associate company, Synlait Milk, according to Reuters.

Before the recall was announced, the product had already been pulled from shelves and was no longer being imported, with the company's importation rights having lapsed at the end of 2025. Formula sold in China, Australia, New Zealand, South Korea, and Vietnam is not subject to the recall, Bloomberg reported.

Shares in Wellington dropped nearly 19% on the day of the announcement, a loss that represented the company's worst single-session performance in roughly nine months.

Consumers with questions can contact a2 Milk at 1-844-422-6455, Monday through Friday, 8 a.m. to 5 p.m. Eastern time.

a2 Milk is recalling U.S. baby formula batches after detecting a bacterial toxin

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