vitamin
Vitamin K
Supports blood clotting and bone metabolism.
What It Does
Vitamin K activates proteins involved in coagulation.
It also participates in bone-related protein carboxylation.
Who Needs It Most
| Demographic | Target Intake | Upper Limit |
|---|---|---|
| all, age:31-120, postmenopause, osteoporosis, perimenopause | 90-120 mcg (K total); 100-200 mcg K2 | No established UL |
| all, age:0-1 | Single 1mg injection at birth | No established UL |
Signs of Deficiency
- Easy bruising
- Bleeding tendency
Best Food Sources
Leafy greens
High
Broccoli
Moderate
Soybean oil
Moderate
Supplement Guide
Best forms: Phylloquinone (K1), Menaquinones (K2)
What to look for: Medication interaction warning on label
What to avoid: Self-adjusting intake if on warfarin
Timing: With meals containing fat.
Who Should Avoid It
No major common contraindications in our database for this nutrient. Always check medication interactions.
The Research
PubMed citations are temporarily unavailable.
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