Vitamin K encompasses a group of fat-soluble vitamins that are essential for blood clotting and bone metabolism [1]. The two main forms are phylloquinone (vitamin K1) and menaquinone (vitamin K2) [2]. Phylloquinone, primarily sourced from green leafy vegetables, is the major dietary form [3]. Menaquinones, which include several subtypes (MK-4 to MK-13), are produced by bacteria and found in fermented foods and animal products [4]. Vitamin K is utilized to address deficiencies and support bone health [5].

The production process for vitamin K1 (phylloquinone) typically involves extraction from plant sources, followed by purification and crystallization [6]. For vitamin K2 (menaquinone), production often involves bacterial fermentation, after which the menaquinone is extracted and purified [7]. Chemical synthesis is also employed to produce both forms of vitamin K [8].

Vitamin K finds application in various scenarios, including food fortification to enhance the nutritional value of food products [9]. It can also be found in dietary supplements aimed at supporting bone health and blood coagulation [10]. In pharmaceuticals, vitamin K is used in treatments for bleeding disorders and to counter the effects of certain anticoagulant medications [11].

Vitamin K is typically packaged in airtight containers to protect it from light and moisture [12]. Storage should occur in a cool, dry place, away from direct sunlight [13]. Following these storage guidelines helps to maintain the stability and potency of the vitamin K [14].

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