Vitamin D deficiency is associated with a 25% higher risk of premature death. People with

Well SupportedUp to 70% of people in the US are deficient or insufficient in vitamin D, suggesting widespread supplementation is advisable.

Well SupportedTarget vitamin D levels for adequate health are often debated between 30-40 ng/mL, with higher levels like 50-60 ng/mL considered optimal.

Well SupportedMeasuring vitamin D blood levels is crucial when supplementing, especially for individuals with polymorphisms affecting vitamin D conversion.

Partially SupportedThe increased risk of premature death associated with vitamin D deficiency holds true for both serum and genetically determined levels.

Partially Supported