dromlakhani Against routine 25(OH)D testing in adults with dark complexion
STEP 1 — Gather Information
Assess skin complexion (patient self-report, noting that race/ethnicity is an imperfect proxy for dark pigmentation) and review for established indications for 25(OH)D testing (e.g., hypocalcemia, malabsorption syndromes, renal osteodystrophy, anticonvulsant therapy, or history of fragility fractures). If no established indications are present, proceed to next step.
STEP 2 — Rule In / Rule Out
Is there an established indication for 25(OH)D testing?
- Yes → Testing may be clinically indicated; this skill does not apply (consider standard workup).
- No → Proceed to recommend against routine screening.
STEP 3 — Classify or Stratify
Classify the scenario as routine 25(OH)D screening in an otherwise healthy adult with dark complexion and no established indications for testing.
STEP 4 — Decide
Do not order a routine 25(OH)D test; instead, discuss dietary vitamin D sources and safe sun exposure, and consider empiric supplementation only if separate clinical indications exist (e.g., osteoporosis treatment) unrelated to complexion-based screening.
Clinical Guardrails / Mimics / Pitfalls
Do not equate race with skin pigmentation; avoid testing based solely on complexion due to high variability within racial groups. Do not use 25(OH)D levels to guide vitamin D dosing in absence of proven benefit. Recognize that low 25(OH)D may be expected but lacks evidence that repletion improves outcomes in this population. Do not apply this recommendation to patients with conditions altering vitamin D metabolism (e.g., chronic kidney disease, gastric bypass) where testing may be warranted.
Concrete Clinical Example
A 48-year-old patient of West African descent presents for wellness visit, reports no bone pain or fractures, normal serum calcium, and requests a vitamin D level after reading online about deficiency risks. The clinician explains that routine screening is not recommended for dark complexion without indications, discusses dietary vitamin D and sun safety, and does not order the test.
Source: Vitamin D for the Prevention of Disease: An Endocrine Society Clinical Practice Guideline, Endocrine Society, 2024, https://doi.org/10.1210/clinem/dgae290