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AI-collected prototype. Not medically reviewed. Verify every source before production use.
Tool

Range Atlas

Profile
AdultAny sex
Mode
Source scan
Selected marker view8 rows · 5 countries · 2 targets

AI-collected source-comparison prototype. Not medically reviewed. Not a diagnostic tool. The chart exposes source disagreement, not whether a value is good or bad.

ng/mL · 8 source rows · spread 7.0x

Vitamin D 25-hydroxy

25(OH)D often appears as nmol/L outside the United States. This fixture converts nmol/L to ng/mL by dividing by 2.5.

Order test

Floor

10

Ceiling

70

Countries

5

Targets

2

Source
10 ng/mL40 ng/mL70 ng/mL
Low to high
Scope
Labs and hospital systems
Mayo Clinic Laboratories

United States · Hospital catalog

Mayo optimum range used as US unit tiebreaker

20 to 50 ng/mL
Native: 20 to 50 ng/mL
adult
KK Women and Children Hospital

Singapore · Hospital system

KKH classifies vitamin D deficiency below 12 ng/mL

>= 12 ng/mL
Native: >= 12 ng/mL
adult
Oxford University Hospitals

United Kingdom · Hospital system

Oxford NHS page classifies 25 to 50 nmol/L as insufficiency

10 to 20 ng/mL
Native: 25 to 50 nmol/L
adult
Countries and guidance
Singapore Medical Journal

Singapore · National clinical article

Singapore article recommends supplementation for confirmed deficiency below 30 ug/L

>= 30 ng/mL
Native: >= 30 ug/L
adult
Swiss Federal Commission for Nutrition report

Switzerland · National guidance

Swiss report considers below 50 nmol/L below adequate for bone health

>= 20 ng/mL
Native: >= 50 nmol/L
adult
RCPA Manual

Australia · Pathology manual

RCPA says vitamin D adequacy is at least 50 nmol/L at end of winter

>= 20 ng/mL
Native: >= 50 nmol/L
adult
Practitioner and biohacker targets
Rhonda Patrick / FoundMyFitness

Biohacker · Practitioner or podcaster

Rhonda Patrick target range from transcript clip

40 to 60 ng/mL
Native: 40 to 60 ng/mL
target
Mark Hyman

Biohacker · Practitioner or podcaster

Mark Hyman optimal vitamin D range

40 to 70 ng/mL
Native: 40 to 70 ng/mL
target
Developer QA and conversion details

Unit rule: normalize to common United States display units. Mayo is the tiebreaker, then Quest, then Labcorp. Fixture: 3 markers, 25 rows, 23 source names, 4 conversion rules.

Conversion guardrails for Vitamin D 25-hydroxy
nmol/L to ng/mLvalue / 2.5
ug/L to ng/mLvalue