Abstract The 4th International Conference on Controversies in Vitamin D was held as a
virtual meeting in September, 2020, gathering together leading international scientific and …

There is a high prevalence of vitamin D deficiency worldwide, but how to define vitamin D
deficiency is controversial. Currently, the plasma concentration of total 25‐hydroxyvitamin D …

The precursor of the active form of vitamin D, 25-hydroxyvitamin D (25 (OH) D), is
recognized as the optimal indicator of vitamin D status. Vitamin D3 undergoes conversion …

Since the discovery of group-specific component and its polymorphism by Hirschfeld in
1959, research has put spotlight on this multifunctional transport protein (vitamin D binding …

Objective: To examine the relationship between endogenous serum estradiol and vitamin D–
binding protein (DBP) and total, free, and bioavailable 25-hydroxyvitamin D (25OHD) …

Introduction: Epidemiological studies suggest a relationship between vitamin D deficiency
and cardiovascular and respiratory diseases. However, whether total, bioavailable, and/or …

The clinical presentation of primary hyperparathyroidism (PHPT) has evolved over the years
from a symptomatic disorder to a predominantly asymptomatic condition. Altered vitamin D …

Objective: To evaluate free and bioavailable 25-hydroxyvitamin D (25 [OH] D) levels in
primary hyperparathyroidism (PHPT) patients. Methods: Fifty PHPT patients and 50 healthy …

Vitamin D binding protein (DBP) is a major plasma carrier for vitamin D and its metabolites.
In recent years, there has been growing interest in understanding the physiological functions …

Objective: To evaluate vitamin D binding protein and free 25-hydroxyvitamin D [25 (OH) D]
levels in healthy controls compared to primary hyperparathyroidism (PHPT) patients, and to …