Browse by exact outcome

Vitamin D level: every measured intervention

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 limits

Questions about Vitamin D level

What can improve Vitamin D level for APOE4 carriers?

For APOE4 carriers, Phoenix has published positive evidence for Plain omega-3 and Vitamin D3 against Vitamin D level. Member #9FAAE3's Vitamin D level moved from 28.2 to 43.7 ng/mL in 259 days. Three members raised their vitamin D level on a Vitamin D3-led combination: 28 to 102 ng/mL in 126 days, 32.1 to 65.8 ng/mL in 69 days, and 33 to 54 ng/mL in 120 days.

What has Phoenix measured against Vitamin D level?

Phoenix has measured 2 interventions against Vitamin D level: 2 positive. See the table below.

Every intervention measured against Vitamin D level

Interventions measured against Vitamin D level
InterventionWhat we observedEvidence status
Plain omega-3Member #9FAAE3's Vitamin D level moved from 28.2 to 43.7 ng/mL in 259 days.Repeated positive
Vitamin D3Three members raised their vitamin D level on a Vitamin D3-led combination: 28 to 102 ng/mL in 126 days, 32.1 to 65.8 ng/mL in 69 days, and 33 to 54 ng/mL in 120 days.Repeated positive

What changed for real APOE4 carriers?

Search by health goal or intervention to see what changed for real members, including results that moved the wrong way.

Nutrient status · Improve vitamin D status · 2 interventions shown.

Health goalNutrient status
SubgoalImprove vitamin D status

Improve vitamin D status

Interventions tested: 2

Plain omega-3

SupplementsOutcomes: 1

Vitamin D level: Increase 4–15.5 ng/mL

Cases: 2Case range

Vitamin D3

SupplementsOutcomes: 1

Vitamin D level: Increase 14.6–74 ng/mL

Cases: 5Case range

The Beat the Odds Study

The 43-page study: what members tried, how their bloodwork and wearable results changed, and what else changed alongside them.

Download the Beat the Odds Study

Turn evidence into your next test

I built this so nobody has to be the first to try something.

476 members have already tried, measured and logged. Join Phoenix and your next blood draw joins the same Navigator you are reading.

Join Phoenix