Menadione Sodium Bisulfate. Menadione Sodium Bisulfate is a synthetic Vitamin K and a root of a great deal of controversy. Vitamin K is a required nutrient for cats and dogs, however pet food regulations do not specify the source (food sourced K or synthetic K) of the nutrition. That is with the exception of fish based cat foods; regulations require Menadione Sodium Bisulfate (and only Menadione Sodium Bisulfate) to be the vitamin K source in fish based cat foods.
The controversy with Menadione Sodium Bisulfate is to its safety. Some insist the ingredient is proven safe citing evidence from years of use in pet foods. Others question the safety of the ingredient citing opposing science (to ingredient safety). The Material Safety Data Sheet for Menadione Sodium Bisulfate states information is “Not available” as to the toxicity risk to animals. The Material Safety Data Sheet does not specify “safe for animals” – it says toxicity risk to animals is not available. Thus the controversy.
For more information on Menadione Sodium Bisulfate, click here.
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