Population Health
Vitamin D prevalence study: data to gather before launch
Most researchers designing a vitamin D prevalence study still anchor the protocol to a single number — usually <20 ng/mL or <50 nmol/L — and assume…
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Population Health
Explore peer-reviewed data, policy briefs, and clinical trials categorized by key themes in micronutrient science and public health.
Population Health
Elderly vitamin D tests: why routine screening wastes budget
Routine vitamin D testing in nursing homes is often treated as a basic quality-control measure. A resident enters long-term care, a 25-hydroxyvitamin…
Population Health
Does dark skin limit winter vitamin D synthesis?
The advice circulates with the confidence of folk wisdom: darker-skinned individuals struggling with low vitamin D should simply spend more time…
Population Health
Vitamin D monitoring: which method suits your risk group?
Vitamin D monitoring methods by demographic cannot be chosen responsibly from a single universal testing menu. The same laboratory result may carry…
Population Health
Vitamin D tests: how seasonal timing wastes your money
A vitamin D blood test is not a static measurement. Serum 25-hydroxyvitamin D [25(OH)D] changes across the year in response to seasonal ultraviolet…