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Current state (February 2026) HRV: 36ms (was 60ms at peak = -40%, but up from 24ms nadir) Min HR: 60.5 bpm (was 52.8 bpm = +15%) Deep Sleep: 70 min (was 116 min = -40%) The most important finding: Comparing identical doses before and after shows the washout made a lasting difference: The same 5mg dose produces 29% better HRV after the washout
Vitamin D supplementation is consistently linked to a higher quality of life and better well-being as we age
J Am Coll Cardiol 34 : 20022006
Health does get mentioned (not always), but typically as a side note
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