Vitamin K

Phytomenadione

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Functions

  • coenzyme in synthesis of fatty acids and glycogen
  • important in blood clotting
  • aids in bone formation

Deficiency

  • haemorrhagic problems
  • 30 percent higher risk of hip fractures

Characteristics

  • fat soluble

Good Sources

  • green leafy vegetables
  • broccoli
  • peas
  • soybeans
  • potatoes
  • liver

Notes

  • Vitamin K2 is the metabolic compound produced by the body from vitamin K
    • Also found in natto (Japanese fermented soybean dish), cottage cheese, and certain cheeses
      • metabolite of the bacteria that ferments milk into cheese

Adequate Intakes (AI)

  • Males (Adult)
    • 120 mcg
  • Females (Adult)
    • 90 mcg
  • Sufficient data to set RDA are unavailable

Tolerable Upper Intake Levels (UL)

  • Adults (19 to 50 yrs)
    • not yet determined

Intakes above UL may lead to negative health consequences.

Supplementation

  • Not recommended.


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