Just received a sample from pet shop, When I saw the ingredient, it include " Menadione Sodium Bisulfite". I wonder this is not good for the dog? Thanks!

The answer is here:
http://www.dogfoodproject.com/index.php?page=menadione

Why is it bad?

• causes cytotoxicity in liver cells
  
• causes formation of radicals from enzymes of leucocytes, with the consequence of cytotoxic reactions
  
• considerably weakens the immune system
  
• possible mutagenic effects
  
• damages the natural vitamin K cycle
  
• has no effect on coumarin derivatives, which are often present incommercial food due to mold contamination (toxic when ingested)
  
• causes hemolytic anemia and hyperbilirubinemia, not just linked to large doses
  
• disturbs the level of calcium ions (Ca2+) in the body, which is an important factor fibrinolysis
  
• is directly toxic in high doses (vomiting, albuminuria), unlike natural vitamin K
  
• builds up in tissue and has been detected in eggs, meat and milk of animals supplemented with menadione derivatives
  
• causes irritation of skin and mucous membranescauses allergic reactions and eczema
  

i thought fromm is Menadione Sodium Bisulfite FREE ..

I don't know, just receive a sample form pet shop and saw this ingredients show on the packs!

Formm應該冇加Menadione, 你可以參考下佢個web page~
http://www.fromm.com.hk/ingredients.htm