Has Sodium Metabisulfite Been Linked To Cancer?

There is limited evidence to suggest that sodium metabisulfite may have some potential to cause cancer in animals. However, there is not enough data to make a conclusive determination about its carcinogenicity in humans. The International Agency for Research on Cancer (IARC) has classified sodium metabisulfite as "not classifiable as to its carcinogenicity to humans" based on the available evidence. Nonetheless, it is recommended to avoid excessive exposure to sodium metabisulfite and follow proper safety precautions when handling it.