vitamin
Vitamin K2
Directs calcium utilization toward bone and away from soft tissue.
What It Does
K2 (especially MK-7) supports carboxylation of bone and vascular proteins.
It is often paired with vitamin D in bone-health protocols.
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
- No single specific early symptom
- Possible suboptimal bone markers over time
Best Food Sources
Natto
High
Aged cheeses
Moderate
Egg yolk
Low to moderate
Supplement Guide
Best forms: MK-7, MK-4
What to look for: Stable daily dosing and purity testing
What to avoid: Use with anticoagulants without clinician review
Timing: With a fat-containing meal.
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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