Vitamin K (phytonadione) daily dose

Vitamin K is  an  essential  fat-soluble  micronutrient  which  is  needed  for  a  unique  posttranslational  chemical  modification  in  a  small  group  of  proteins  with  calcium-binding properties, collectively known as vitamin K – dependent proteins or Gla-proteins. Thus far,  the  only  unequivocal  role  of  vitamin  K  in  health  is  in  the  maintenance  of  normal coagulation. Some studies suggest that it helps maintain strong bones in the elderly.

Vitamin K (phytonadione) daily dose

AgeVitamin K (phytonadione)
(l)
μg/day
0 - 6 months5 (m)
7-11 months10
1-3 years15
4-6 years20
7-9 years25
10-18 years
Males
35-65
10-18 years
Females
35-55
Males
19 - 65 years
65
Females
19-50 years
(pre- menopausal)
55
Females
51-65 years
(menopausal)
55
65 + years Males65
65 + years Females55
Pregnancy55
Lactation55

(l) The RNI for each age group is based on a daily intake of 1 μg/kg/day of phylloquinone, the latter being the major dietary source of Vitamin K.
(m) This intake cannot be met by infants who are exclusively breast-fed. To prevent bleeding due to vitamin K deficiency, all breast fed babies should receive vitamin K supplementation at birth according to nationally approved guidelines.

Vitamin K (phytonadione) Food sources: green leafy vegetables, such as kale, spinach, turnip greens, collards, Swiss chard, mustard greens, parsley, romaine, and green leaf lettuce, vegetables such as brussels sprouts, broccoli, cauliflower, and cabbage, fish, liver, meat, eggs, and cereals (contain smaller amounts).