|Purred: Wed Apr 4, '07 9:31pm PST |
|Menadione is a synthetic form of vitamin K (K3) that has been found to be toxic. The source saying that menadione is in Blue Buffalo dog food (and possibly Blue Spa cat food) is here (scroll down, it's near the bottom of the page):
Since the FDA prohibits it's use in pet foods, Blue Buffalo should have taken it out -- although there may be older cans/bags of food out there. Check your labels. The easiest way to find out whether menadione is in your dog's (or cat's) food is by reading the label (Vitamin K or K3 supplement or menadione).
The FDA's food status safety list has menadione as revoked for use as a supplement in human or pet food (p. 48):
See Vitamin K
On eMedicine website:
This particular toxicity is typically associated with formula-fed infants or those receiving synthetic vitamin K-3 (menadione) injections. Because of its toxicity, menadione is no longer used for treatment of vitamin K deficiency.
Effects may include jaundice in newborns, hemolytic anemia, and hyperbilirubinemia.
Toxicity also blocks the effects of oral anticoagulants."
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