Canadian regulators have warned consumers to be alert for possible "product substitution and/or tampering" in infant formula products following four complaints.
The Canadian Food Inspection Agency said these incidents are not "typically" associated with the manufacturing process but "occur occasionally when a consumer returns altered products to the retail store for a refund".
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The CFIA continued: "Infant formula products have been found where the outer cases and containers are intact but the product inside may have the tamper-proof seal broken and may contain a different product (brand and/or variety)."
Consumers using infant formulas should examine the containers to ensure that the security seal is intact, the CFIA urged.
The agency said that no illnesses have been associated with the issue.
"The CFIA will take all necessary steps to protect the safety of the Canadian food supply," the agency added.
