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The effect of UVB irradiation compared with oral vitamin D supplementation on well-being in psycho-geriatric nursing home residents in the Netherlands

Comparing the additional effects of UVB irradiation to oral vitamin D supplementation on well-being and quality of life in psycho-geriatric nursing home residents.

Vitamin B12 deficiency after esophagectomy with gastric tube reconstruction.

Objective of this study is to determine the prevalence of vitamin B12 deficiency among patients who underwent esophagectomy with GTR. The following specific research questions heve been defined:- What is the prevalence of vitamin B12 deficiency in…

Is long-term use of proton pump inhibitors associated with vitamin B12 deficiency in elderly individuals?

Is long-term PPI-use associated with low vitamin B12 levels in old age?

Efficacy of a predefined vitamin D dosing regimen in vitamin D-insufficient multiple myeloma patients.

The primary objective of this study is to determine the efficacy of a predefined vitamin D dosing regimen on the prevalence of vitamin D insufficiency in MM patients. Secondary objectives are to detect the influence of several variables (age, gender…