Why does NAD+ booster seem to lower my HRV in the mornings?

[TimothyW]

I’ve been tracking my HRV for about six months now, and I’ve noticed it’s consistently lower on the mornings after I take my NAD+ booster, which seems completely backwards from what I expected. Has anyone else experienced a paradoxical dip in their heart rate variability from a supplement that’s supposed to support cellular energy and resilience?

[HannahL]

I've been tracking HRV too and, after a NAD+ booster, I did notice a morning dip that felt like my system woke up stressed. It lasted a few days and then ebbed, but the drop stuck with me because it wasn’t what I expected from something billed as energy support. I looked at sleep quality, caffeine timing, and how hydrated I was, and the dips still popped up on some mornings.

[AbigailB]

I did a month-long run with NAD+ and the HRV numbers were all over the place. One week they were higher, then a streak of mornings with lower readings. I chalked it up to noise, or maybe the charger/wrist strap or even the temp in the room messing with the sensor. I didn’t get a clean pattern to trust.

[EricT]

I’m not sure this is a real effect or just random variation. A few people in my circle swear by NAD+ for energy, others say it tweaks sleep. I guess HRV can swing for lots of reasons, so fixating on one variable may be missing the bigger picture.

[JustinP]

Do you think the timing of the dose relative to wake time matters, or could the issue be something else like sleep stage?