Why is my HRV down lately?

Your HRV (RMSSD) has fallen about 11% over the last 90 days, from a 65 ms baseline to 58 ms today. Three things in your data changed over the same window.

The first is iron. Your most recent Iron panel · 2026-04-12 shows ferritin at 14 ng/mL, below the lab's 30 ng/mL floor, and it has dropped on each draw for over a year. Its timing lines up with your HRV 14-day trend.

The second is sleep. Total sleep is steady at about 7h 12m, but Sleep architecture shows REM getting more broken up.

The third is caffeine. Your CYP1A2 genotype is linked to slower caffeine clearance, so a 3pm coffee may still be active at bedtime.

These are patterns, not a diagnosis. A question to bring to your clinician: is iron worth checking as a factor in my lower HRV?

Two things are worth keeping on your radar. Neither is urgent, and both are conversations for your clinician.

The first is genetic. Your Heart-health polygenic signal leans toward the higher end. It is a directional signal, not a percentage and not a diagnosis. The rest of your data adds context: your LDL-C is 94 mg/dL and trending down, your HDL is in range, and your fasting metabolic panel is in range too.

The second is your CYP2C19 PGx result. It means some medicines, like clopidogrel, may work differently for you. Share it with any clinician who prescribes for you.

These are observations, not a diagnosis. If something changes, like a new symptom or a new lab, bring it back here and we'll look at the data again.