Bedtime timing signal
One member moved her session closer to bedtime and reported that the routine fit sleep more naturally.
Phoenix x ZenoWell
Early Signals from 31 APOE4 Carriers Using ZenoWell taVNS
What happened when 31 APOE4 carriers used gentle taVNS?
ZenoWell Luna uses ear-based vagus nerve stimulation, formally transcutaneous auricular vagus nerve stimulation (taVNS). Explore what started to show across 656 logged use days, then unlock the complete Phoenix research report.
31 carriers656 use days
Complete study report
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The full member protocol, the detailed data tables, every limitation, and the exact study Phoenix will run next.
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Early observational signals. Individual experiences. Not proof of efficacy or causation.
Study device
The rounded silver ZenoWell Luna used for ear-based stimulation.
The evidence trail
Enough use to find a signal worth testing.
These are traceable members who explicitly logged ZenoWell use, not anonymous impressions detached from a protocol.
31
traceable members
Each explicitly logged ZenoWell use.
656
ZenoWell-use days
A substantial real-world exposure trail.
23 days
median per member
Not just one-off experiments.
74%
reached 10+ days
23 of 31 members logged at least 10 use days.
At least 10 days: 23 of 31 (74%)
At least 20 days: 17 of 31 (55%)
At least 28 days: 8 of 31 (26%)
Same person, different nights
Use nights leaned positive.
Phoenix compared each eligible member with themselves and gave each person equal weight. Members needed at least five explicit use nights and five explicit non-use nights.
The strongest self-reported signal was energy, followed by wellbeing and sleep.
Calm moved slightly negative at -0.08, an important reminder that the pattern was mixed, not universally positive.
Use minus non-use, n=10Exploratory
Energy
average within-person difference
Wellbeing
8 of 10 members leaned positive
Sleep quality
7 of 10 members leaned positive
Mental sharpness
nearly flat
Calm
no positive signal
Points on the Phoenix 0-10 daily check-in scale. All confidence intervals included no effect.
What the wearables saw
Two wearable directions to test again.
Sleep score and HRV moved positive in small paired subsets, while total sleep and resting heart rate stayed flat. Paired wearable subsets ranged from n=6 to n=9. All confidence intervals included no effect.
5 of 6 positive
+2.1
sleep-score points
A small, consistent directional signal in same-person comparisons.
6 of 9 positive
+3.9 ms
overnight HRV
A promising physiological direction, still too small to treat as a settled effect.
Paired wearable subsets: n=6 to n=9
Total sleep time: about five minutes lower, effectively flat.
Resting heart rate: flat.
Sleep-stage data were too sparse for a confident group claim. A real research engine keeps the nulls visible.
The signal in members' own words
The averages point. The stories explain.
Individual experiences are not group-level proof. They are high-value clues about timing, comfort, and which outcomes deserve a better test.
Sleep-onset signal
One member described easier sleep onset during the study window.
Subjective and wearable data can differ
One member felt better even while her wearable trend stayed flat, a useful reminder to keep both data streams.
One-person lead, not a conclusion
One person's experience suggested a timing question worth testing with a cleaner baseline and a planned schedule.
Method and protocol
Same-person comparisons, informed by real-world use.
Phoenix compared each member's reported use nights with their own non-use nights. The main paired analysis required five explicit use nights and five explicit non-use nights, and each eligible person counted once.
The field notes beside it show how members refined timing, contact, comfort, and safety details for a stronger next study.
“I’m Kevin, a Doctor of Pharmacy and an APOE4/4 carrier, and I ran these same-person comparisons myself. I’m showing you the flat and null results next to the positive ones, because early signals are only worth anything when you can see what didn’t move.”
— Kevin Tran, Doctor of Pharmacy · APOE4/4 carrier
- 01
Gel may help if water dries too quickly
Water or conductive gel can support contact. If water dries too quickly, gel may help maintain a consistent connection.
- 02
Check the silicone cover
Removing the black silicone cover when fit allowed made stimulation stronger and more comfortable for some members.
- 03
Follow Luna's safety guidance
Follow the Luna manual and listed contraindications before use. Stop for pain, irritation, dizziness, or other discomfort.
- 04
Start at just-noticeable
Begin where stimulation is barely perceptible, then increase only as comfortable.
- 05
Use it when naturally sleepy
The routine appeared easier to sustain when it followed the body, not the clock.
- 06
Try Relax before Sleep
Members discovered this sequence through use on high-stress evenings, not from the manual.
708+ active APOE4 carriers
Why Phoenix can find this
A community becoming a research engine.
Phoenix combines the questions carriers care about with the longitudinal data needed to find early signals, interpret them honestly, and design the next test.
Phoenix is building the largest carrier-led APOE4 research platform.
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728
daily check-ins
2,527
HRV observations
722
sleep observations
622
blood measurements
- 01
Carriers try an intervention.
- 02
Phoenix connects their real-world data.
- 03
Early signals and individual stories emerge.
- 04
The community improves the protocol.
- 05
The next study starts with a sharper question.
- 06
More members and more partners make each cycle stronger.
Research run by APOE4 carriers, for APOE4 carriers.
The next study
Early signals tell us exactly what to make stronger.
This is why Phoenix is building carrier-led research infrastructure: every exploratory study can make the next protocol more focused, more useful, and easier for a partner to run.
- 01
Connect wearables before the first device night.
- 02
Capture a fixed 14-day baseline.
- 03
Name sleep onset, sleep score, wellbeing, and HRV as the outcomes.
- 04
Use a randomized crossover or planned on/off schedule.
- 05
Record discomfort and adverse events in a structured form.
- 06
Separate device mode and intensity.
- 07
Follow members long enough to see whether the signal strengthens, fades, or depends on continued use.
Read this before interpreting the results
Limitations and uncertainty
The signal is useful because the boundaries are visible.
- These findings are observational and exploratory; there was no randomized control group.
- Members chose whether and when to use the device.
- Only 10 members had enough explicit use and non-use days for the main self-report comparison.
- Only 6 to 9 members qualified for the wearable comparisons.
- All confidence intervals included no effect. The results do not establish efficacy.
- Wearables were not connected before first use, so there was no clean group baseline.
- Twenty-four of 31 members logged other overlapping interventions or supplements.
- Positive experiences, null experiences, and discomfort were all present.
- Device notes included pain or hurt language from 5 members, ear or skin irritation from 2, headache from 2, and stop language from 3.
- No structured adverse-event system was used. Phoenix cannot claim that no serious adverse events occurred.
- Total sleep time was about five minutes lower on average, effectively no signal; resting heart rate was flat, and sleep-stage data were too sparse to interpret.
- An earlier result found 13 of 17 members with higher sleep scores and a direction-count p=.049, but the average change was not significant.
- A separate analysis anchored to each member's actual first and last logged use found essentially no sustained post-use change among nine eligible members.
Questions, answered
What these results do and do not mean.
ZenoWell is an ear-based vagus nerve stimulation device. The formal name is transcutaneous auricular vagus nerve stimulation (taVNS). Phoenix members used it in everyday life while logging sleep and wellbeing and, where available, connecting wearable data.
Across 656 logged ZenoWell-use days, same-person comparisons leaned positive for energy and wellbeing. Sleep score and HRV were the clearest wearable signals, while total sleep time, resting heart rate, and sleep stages were mostly flat or too sparse to interpret confidently.
No. This was a small, observational, exploratory analysis, not a randomized efficacy trial. The results are early signals that help Phoenix and future research partners choose what to test more rigorously next.
Phoenix compared each member with themselves, using nights explicitly logged as ZenoWell use versus explicit non-use nights. A member needed at least five nights in each state, and each eligible person counted once in the group average.
Join Phoenix, choose which health data you want to connect, and watch for the next study invitation. More participating members and more research partnerships help turn promising individual signals into stronger shared evidence.
The honest bottom line
A promising start. A better next study.
708+ active APOE4 carriers are helping Phoenix turn shared questions into stronger next studies.
Complete study report
Get the complete Phoenix research report
The full member protocol, the detailed data tables, every limitation, and the exact study Phoenix will run next.
Checking your Phoenix access…
Checking your Phoenix account…
Twenty-three of 31 members logged at least 10 use days.
Sleep onset appeared repeatedly in member stories.
Wellbeing, energy, and sleep quality leaned positive after use nights among 10 eligible members.
Wearable sleep score and HRV moved positively for a majority of eligible members: 5 of 6 and 6 of 9.
The community discovered a better real-world protocol for the next study.
More members. More partners. Better questions. Stronger evidence with every cycle.
About the device
About the ZenoWell Luna
The ZenoWell Luna is the rounded silver, ear-based device Phoenix members used in this study. It delivers gentle transcutaneous auricular vagus nerve stimulation (taVNS) in short sessions, usually before bed.
Want to try the ZenoWell Luna? Phoenix readers can save 20% with code APOE4.
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