Episode

15 Dec 2025 · 5 min

0:00

JJ Virgin explains the 25-hydroxy vitamin D blood test and why you need it twice a year. Aim for 50-80 ng/mL, not the lower ranges labs often report. Start with 2,000 IU daily, bump to 5,000-10,000 if deficient, and take it with vitamins K1 and K2.

Questions this episode answers

25-hydroxy vitamin D (25(OH)D) blood test.

Approximately 50–80 ng/mL.

At least twice a year; re-test 2–3 months after starting or changing supplementation.

At least 2,000 IU per day.

Typically between 5,000 and 10,000 IU per day, with faster repletion possible (e.g., 10,000 IU/day) and follow-up testing after 2–3 months.

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