Summary
Multiple studies find that vitamin D deficiency is associated with reduced HRV, particularly in populations with cardiovascular risk factors. The relationship is stronger in those with existing health conditions.
Methods
Review of cross-sectional and intervention studies
Key Findings
- SDNN, SDANN, and triangular index lower with vitamin D deficiency
- Relationship strongest in hypertensive patients
- Some studies show no association in low-risk populations
- Supplementation may stabilize cardiac autonomic tone
Limitations
Mostly cross-sectional data, causation not established
What This Means for You
Vitamin D deficiency may impair autonomic function, especially if you have cardiovascular risk factors. Consider testing vitamin D levels if your HRV is consistently low despite lifestyle optimization.
Source
Read the original paper in Advances in Nutrition ↗
Added to HRV Zone: 2025-01-10