💪 Body
Vitamin D3+K2 — Why Together and How to Dose Year-Round
Optimal 25(OH)D is 40–60 ng/mL, not 20 ng/mL. How to adjust your D3 dose, add K2 and when to test.
#vitamin D3#K2#immunity
8 min7 February 2026
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Immunity & Health
Vitamin D3+K2, zinc, elderberry — proven immunity-building protocols year-round, not just in winter.
1 article