25-Hydroxyvitamin D

Other marker

Vitamin D

25-Hydroxyvitamin D

Category: Other
Unit: nmol/L

Essential vitamin for bone health, immune function, and hormone production.

PED Notes

Many athletes are deficient despite supplement use. Important for testosterone production, immune function, bone health, and mood. Aim for 75-150 nmol/L for optimal performance and hormonal health.

Supplements:

  • Vitamin D3 -- 5000 IU/day (take with a fat-containing meal for absorption)
  • Vitamin K2 (MK-7) -- 100-200mcg/day (directs calcium to bones, not arteries)

Follow-up:

  • Recheck levels after 8-12 weeks of supplementation

References:

  • Holick, M. F. (2007). Vitamin D deficiency. New England Journal of Medicine, 357(3), 266-281. DOI: 10.1056/NEJMra070553
  • Institute of Medicine. (2011). Dietary reference intakes for calcium and vitamin D. National Academies Press. DOI: 10.17226/13050
  • Pilz, S., Frisch, S., Koertke, H., et al. (2011). Effect of vitamin D supplementation on testosterone levels in men. Hormone and Metabolic Research, 43(3), 223-225. DOI: 10.1055/s-0030-1269854

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Reference Ranges

Standard Range

50 - 250 nmol/L

VitalMetrics Range

75 - 150 nmol/L

Statistics