What is Vitamin K1 (phytonadione)?

Category: Supplements

Most popular types: Mephyton


Vitamin k 1 or phytonadione is a fat soluble vitamin used to promote proper growth and good health, for vitamin K deficiency, as a supplement for people who cannot digest fat soluble vitamins, and to prevent or treat bleeding.

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Increase effect of another treatment 4 1
Cystic fibrosis 1 0
Fat malabsorption 1 0
Support immune health 1 1

  • Major
  • Moderate
  • Slight
  • None
  • Can't tell

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations Percentage
Severe 0
Moderate 0
Mild 0
None 1

Commonly reported side effects and conditions associated with Vitamin K1 (phytonadione)

Side effect Patients Percentage

Why patients stopped taking Vitamin K1 (phytonadione)

Multiple reasons could be selected

Reason Patients Percentage
Other 1
See 1 patient who's stopped taking Vitamin K1 (phytonadione)


Stopped taking Vitamin K1 (phytonadione)

Duration Patients Percentage
Less than 1 month 1
2 - 5 years 1
Adherence Evaluations Percentage
Always 0
Usually 1
Sometimes 0
Never taken as prescribed 0
Burden Evaluations Percentage
Very hard to take 0
Somewhat hard to take 0
A little hard to take 0
Not at all hard to take 1
Last updated:
There are no evaluations for Vitamin K1 (phytonadione).