Thousands of tins of infant formula have been recalled over a toxin that could lead to illness among babies who consume it, according to a notice posted by the U.S. Food and Drug Administration. In the notice, shared Saturday, the FDA said a2 Milk Company of Colorado had issued a voluntary recall of three batches of its a2 Platinum Premium USA formula, advertised for children who are 12 months old and younger. Cereulide, a toxin created by some strains of the Bacillus cereus bacterium, was found to be present in the formula, the notice warns. The toxin, which is not eliminated even when the formula is prepared with hot water, can make infants sick within as little as 30 minutes. Symptoms, which usually develop within six hours, are generally gastrointestinal, including nausea and vomiting. While these symptoms can pass within a day, the FDA warns that infants are at a greater risk and may experience complications, like dehydration, that could require medical care.