Vitamin
Vitamin K
Vitamin K is found naturally in many foods. The NIH Office of Dietary Supplements publishes a recommended amount of Adult men 19 years and older 120 mcg; Adult women 19 years and older 90 mcg. Read 2026-08-09.
What is Vitamin K?
NIH's fact sheet for Vitamin K carries no line we quote here under this heading.
How much Vitamin K does NIH publish?
| Life stage | Amount | Printed table |
|---|---|---|
| 1–3 years | 30 mcg | Recommended Amount |
| 14–18 years | 75 mcg | Recommended Amount |
| 4–8 years | 55 mcg | Recommended Amount |
| 7–12 months | 2.5 mcg | Recommended Amount |
| 9–13 years | 60 mcg | Recommended Amount |
| Adult men 19 years and older | 120 mcg | Recommended Amount |
| Adult women 19 years and older | 90 mcg | Recommended Amount |
| Birth to 6 months | 2.0 mcg | Recommended Amount |
| Pregnant or breastfeeding teens | 75 mcg | Recommended Amount |
| Pregnant or breastfeeding women | 90 mcg | Recommended Amount |
Children and teens
Rows for children and teens appear in the table above, in NIH's own wording.
Pregnancy and breastfeeding
Rows for pregnant and breastfeeding life stages appear in the table above, in NIH's own wording.
What upper limit does NIH publish for Vitamin K?
NIH publishes no upper limit for Vitamin K.
Which foods contain Vitamin K?
"Vitamin K is found naturally in many foods."
Where these numbers come from
Every quote and every amount on this page comes from National Institutes of Health, Office of Dietary Supplements. Vitamin K — Consumer. Public domain (U.S. Government work). LAFYA read the sheet 2026-08-09.
Read the full fact sheet at NIH Office of Dietary SupplementsWhat LAFYA does not say about Vitamin K
LAFYA publishes no claim that vitamin k does anything in the body, because we cannot prove one.