Methods To address these aims we performed a key word search of the PubMed and
MEDLINE online databases in conjunction with individual manual searches to gather …

The numbers of vitamin D inadequacies has reportedly increased in the general population,
especially in the Northern hemisphere. However, routine measurement of 25 (OH) vitamin D …

Background The effect of vitamin D supplementation on muscle function in older adults has
been tested in randomized trials with mixed results, which may be due to differences in the …

Background and aim Dried blood spot (DBS) sampling has many advantages over
conventionally used blood samples, but is thought to suffer from hematocrit related issues …

Measurement of vitamin D has increased significantly over the last years due to its
involvement not only in calcium homeostasis, but also in the pathogenesis of various …

Context: Recognition that vitamin D might be associated with many chronic diseases has led
to large-scale epidemiological and clinical studies. Dried blood spots (DBS) are a useful …

Background: Vitamin D insufficiency is associated with subfertility and prolonged estrus
cycles in animals, but humans have not been well studied. Methods: A prospective time-to …

An efficient and robust method to measure vitamin D (25-hydroxy vitamin D3 (25 (OH) D3)
and 25-hydroxy vitamin D2 in dried blood spots (DBS) has been developed and applied in …

Volumetric absorptive microsampling (VAMS) has arisen as a relevant tool in biological
analysis, offering simplified sampling procedures and enhanced stability. Most of the …

STUDY QUESTION Is pre-conception 25 (OH) D associated with the per cycle probability of
conception, ie fecundability, in a prospective cohort study? SUMMARY ANSWER There are …