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.

Research issue
Issue 01
Data through
2026-08-09
Evidence map version
v1.1.0
Explore the evidence Get the Evidence Map

How to read this

Phoenix research is longitudinal and observational: we follow real APOE4 carriers over time and compare each member with their own earlier self, with no placebo group, no randomisation, and members choosing their own interventions.

That means these are strong signals pointing at what to test next, not proof of cause. Most nutrition, supplement and lifestyle research you read online has exactly the same design. The difference is that we say so, and we show you the confounders.

Read the full methods and limits

What the Phoenix community is measuring

Browse exact outcomes and interventions. Each result keeps its source, measurement rule and audit record beside the claim.

Get the PDFJoin Phoenix in 7 minutes Open inside Phoenix

Nutrient status

Track each named nutrient biomarker in its own unit.

Still unanswered

Vitamin D level

Laboratory 25-hydroxy vitamin D result · Aim: higher

Vitamin D3

?Collecting evidence

The support cohort has 159 Vitamin D3-family users and 44 with a repeat level, but dated starts and clean eligibility are not published.

0 selected member cases · not a response rate

Logged members
159
Members with repeats
44
Measurements
88
Sources and context

Members matched to the Vitamin D3 support family for the repeat 25-hydroxy vitamin D question.

  • report-lines-129-156, reviewed by independent verifier

Collecting evidence

No answer yet on Vitamin D level

Vitamin D3 is being tracked against Vitamin D level, but Phoenix has not yet published a ranked result for this exact question.

Every carrier who logs a dated start and a repeat test moves this page closer to an answer, including you.

Topic-specific updates about Vitamin D3 · No spam

Audit history

These historical records remain beside the current evidence so you can see why their status changed.

Vitamin D level

Creatine monohydrate

!Record under review

Two apparent rises of about 41% are disputed because unlogged vitamin D3 starts likely made the windows look clean.

0 selected member cases · not a response rate

Logged members
112
Members with repeats
2
Observations
2
Measurements
4
Sources and context

Curated apparent creatine windows with repeat 25-hydroxy vitamin D results.

  • report-lines-159-189, reviewed by independent verifier

This result is under review: The repeated direction is preserved as an artifact specimen, not ranked active evidence.

Keep the map

Take every result into your next experiment.

Get the Issue 01 Evidence Map by email. It groups the same evidence by outcome and by intervention, including what worked, what did not, and what Phoenix wants to test next.

Instant PDF · Issue 02 lands in your inbox the day it publishes · No spam

Turn evidence into your next test

Magnesium and homocysteine is 7 members from an answer.

Forty carriers with a dated start and a repeat blood test close it. Creatine, vitamin D3 and B12 sit further back. Your next blood test is somebody else's answer, and theirs is yours.

Take the 7-minute assessment