Several publications have presented data suggesting that individuals with serum vitamin D levels in the low-to-normal range may actually be vitamin D-deficient (Am J Med. 2004;116:634-639 and JAMA ...

An increase in mean serum 25-OHD level of 11.9 (8.6) ng/mL was observed among participants with vitamin D supplementation at 2 years, along with an increase in BioD, FVD, 25-OHD3, and 25-OHD levels.

Cholecalciferol reduced diabetes risk by 76% (HR, 0.24; 95% CI, 0.16-0.36) in participants who maintained a higher mean serum 25-hydroxyvitamin D level of at least 125 nmol/L during follow-up ...

Study: Vitamin D for the Prevention of Disease: An Endocrine Society Clinical Practice Guideline. Image Credit: Rabizo Anatolii/Shutterstock.com Background Studies have linked serum 25 ...