Author’s response to reviews Title: Nutrition assessment of Vitamin A and Vitamin D in northeast Chinese population based on SPE/UPLC/PDA Authors: ying

Nutrition assessment of vitamin A and vitamin D in northeast Chinese population based-on SPE/UPLC/PDA

Background: The aims of the current study were to assess the nutritional status of 25OHD3 and retinol in a northern Chinese population using our established reliable method for the simultaneous determination of serum 25OHD3 and retinol. Method: We established a reliable method for the simultaneous determination of 25OHD3 and retinol using SPE and UPLC/PDA; measured the serum levels of 25OHD3 an...

The Relationship between Serum Vitamin D Levels and Risk of Abdominal Obesity: A Systematic Review and Dose-Response Meta-Analysis of Epidemiologic Studies

Background: Although the relation of serum vitamin D levels with abdominal obesity has been investigated by previous observational studies, the results are inconsistent. In the current study, a dose-response meta-analysis was conducted on epidemiologic studies that evaluated this association in adults. Methods: We performed a systematic search of all published articles, up to May 2020, in five...

Author's response to reviews Title: Vitamin D Binding Protein Variants Associate Asthma Susceptibility in a Chinese Han Population Authors:

What is the definition of \"vitamin D deficiency\" and who is considered \"vitamin D deficient\"? Urgent need for a national consensus

since early works on isolation and characterization of vitamin D by Elmer Verner McCollum and Edward Mellanby in 1900s, this molecule still seems mysterious (1-2). After several decades since discovery of the miraculous effect of cod liver oil in treatment of nutritional rickets, escalating number of reports provide a huge body of evidence for various effects of vitamin D ...

High Dose Vitamin D Supplementation and Improvement in Cognitive Abilities, Insomnia and Day-Time Sleepiness in Adolescent Girls

Objective: Vitamin D may affect the modulation of signaling pathways in the central nervous system. We aimed to evaluate the effect of high-dose vitamin D supplementation on neuropsychological functions in female adolescents. Methods: We studied the effects of 9 weeks of vitamin D supplementation (50000 IU vitamin D3 [cholecalciferol]/week) on cognitive abilities and sleep disorders in 940 ado...