Background Despite daily vitamin D recommendations, women with osteoporosis may not
achieve optimal 25-hydroxy-vitamin D (25 [OH] D) levels. We retrospectively evaluated the …

Optimal vitamin D concentrations for bone health have not been determined in the Korean
population. The aim of this study was to define serum 25-hydroxyvitamin D (25 [OH] D) …

Vitamin D deficiency poses a global public health burden; however, there are limited studies
on the relationship between vitamin D intake and serum 25-hydroxyvitamin D (25 (OH) D) …

Abstract Populations of East Asian countries have been known to have low calcium intakes
and low serum 25 (OH) D concentrations, suggesting that Ca and vitamin D (VitD) …

Objective: To determine the vitamin D status of Korean postmenopausal women during the
winter months according to the intake of vitamin D supplements. Design: Cross sectional …

Objectives The purpose of this study was to examine the relative impact of seasonal
differences and age on dietary vitamin D intakes, outdoor activity time and serum vitamin D …

Objectives: Vitamin D deficiency, which causes secondary hyperparathyroidism, is
considered to be a major contributor to osteoporosis. Because the serum 25-hydroxyvitamin …

This study was performed to estimate serum 25-hydroxyvitamin D (25-OHD) level in
wintertime and to evaluate the relationship between serum 25-OHD level and associated …

Inadequate vitamin D status is highly prevalent in the Korean population, especially among
young adults. Nonetheless, correlates of suboptimal vitamin D levels in young adults are not …

In this study, the serum level of 25-hydroxyvitamin D (25-(OH) D) was measured by high
pressure liquid chromatography (HPLC), and factors affecting it were investigated in 72 …