Ranked only against the same measurement, in the same unit. See the positive, neutral, opposite-direction and still-collecting evidence before deciding what is worth your own test.
Phoenix APOE4 Research · Reviewed by Kevin Tran, APOE4/4 carrier and founder · Data through 2026-08-23 · How to read this research
How to read this
Observational research: real APOE4 carriers tracked over time, each compared with their own earlier self. Members chose their interventions, with no randomisation or placebo group. Everything else they changed is shown beside each result.
Read the full methods and limitsFor APOE4 carriers, Phoenix has published positive evidence for Seven-day check-in streak and Earlier bedtime against Mental sharpness rating. Across 67 members, seven-day-plus streak periods carried 0.21 to 0.26 more mental-sharpness points than one-to-two-day streak periods. Among APOE4/4 carriers logging early bedtime, improved mental sharpness outnumbered worse ratings; no public responder percentage is generated.
Phoenix has measured 2 interventions against Mental sharpness rating: 2 positive. See the table below.
| Intervention | What we observed | Evidence status |
|---|---|---|
| Seven-day check-in streak | Across 67 members, seven-day-plus streak periods carried 0.21 to 0.26 more mental-sharpness points than one-to-two-day streak periods. | Repeated positive |
| Earlier bedtime | Among APOE4/4 carriers logging early bedtime, improved mental sharpness outnumbered worse ratings; no public responder percentage is generated. | Repeated positive |
Search by health goal or intervention to see what changed for real members, including results that moved the wrong way.
Mental sharpness · Better mental sharpness · 2 interventions shown.
Mental sharpness: Increase 0.21–0.26 points
Members: 67
Across 67 members, seven-day-plus streak periods carried 0.21 to 0.26 more mental-sharpness points than one-to-two-day streak periods.
Seven-day check-in streak
✓Repeated positiveAcross 67 members, seven-day-plus streak periods carried 0.21 to 0.26 more mental-sharpness points than one-to-two-day streak periods.
Little published human data on this link yet.
Mental sharpness: Increase
APOE4/4
Among APOE4/4 carriers logging early bedtime, improved mental sharpness outnumbered worse ratings; no public responder percentage is generated.
Earlier bedtime
✓Repeated positiveAmong APOE4/4 carriers logging early bedtime, improved mental sharpness outnumbered worse ratings; no public responder percentage is generated.
The 43-page study: what members tried, how their bloodwork and wearable results changed, and what else changed alongside them.
Turn evidence into your next test
476 members have already tried, measured and logged. Join Phoenix and your next blood draw joins the same Navigator you are reading.
Full research index
Choose an outcome, like LDL cholesterol or sleep, or an intervention, like training: both paths open the same measured records.