Menadione, also known as Vitamin K3 or menaphthone, is a synthetic provitamin K compound that is converted to the active form menaquinone-4 (Vitamin K2) in the body. It is produced by chemical synthesis and is commonly available as Menadione Sodium Bisulfite (MSB) or Menadione Nicotinamide Bisulfite (MNB) for improved stability. Menadione serves as the most cost-effective Vitamin K source for animal nutrition.
It supports blood coagulation, bone metabolism, and calcium regulation. It is primarily used in animal feed premixes for poultry, swine, and aquaculture species. Its various salt forms offer different stability profiles suited to specific feed processing conditions.