Friday Q&A: The Best Time to Work Out & How Much Vitamin D You Need

15 Dec 2025 · 19 min
Episode

15 Dec 2025 · 19 min

0:00

JJ Virgin answers listener questions on vitamin D levels, exercise timing, and meal schedules. Get your vitamin D tested and aim for specific target levels. Schedule workouts in the morning when possible, and stop eating three to four hours before bed for better sleep.

Questions this episode answers

25-hydroxy vitamin D test

50–80 ng/mL

Vitamin D3 together with vitamin K (avoid or consult doctor if on blood thinners)

Up to 10,000 IU daily for the first month or two, then retest

About 5,000 IU daily, possibly as low as 2,000 IU depending on season and levels

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