Results 31 to 40 of about 65,192 (231)

Circulating Vitamin D Levels and Risk of Vitiligo: Evidence From Meta-Analysis and Two-Sample Mendelian Randomization

Frontiers in Nutrition, 2021
Background: The association between circulating vitamin D levels and risk of vitiligo was inconsistent among observational studies, and whether these observed associations were causal remained unclear.
Jie Song, Ke Liu, Weiwei Chen, Bin Liu, Hong Yang, Linshuoshuo Lv, Xiaohui Sun, Yingying Mao, Ding Ye   +8 more
doaj   +1 more source

25-Hydroxyvitamin D in Plasma of Cattle

Journal of Dairy Science, 1979
Blood samples from 12 Shorthorn heifers, fed a grass silage ration and housed indoors or outdoors, were assayed for 25-hydroxyvitamin D during 9 mo. There was more in plasma during the summer from the outdoor group, reflecting a greater exposure to ultraviolet light and dermal synthesis of vitamin D, the precursor of 25-hydroxyvitamin D.
M, Hidiroglou, J G, Proulx, D, Roubos
openaire   +2 more sources

25‐Hydroxyvitamin D Levels and Hypertension Rates

The Journal of Clinical Hypertension, 2010
Vitamin D deficiency has been linked to cardiovascular disease and risk factors including hypertension. The authors sought to determine prevalence rates of hypertension in adults tested for 25‐hydroxyvitamin D categorized by their levels and evaluate odds ratios for hypertension at lower 25‐hydroxyvitamin D levels compared with optimal levels.
Simran K, Bhandari, Shahe, Pashayan, In Lu A, Liu, Scott A, Rasgon, Dean A, Kujubu, Thomas Y, Tom, John J, Sim   +6 more
openaire   +3 more sources

Associations of vitamin D pathway genes with circulating 25-hydroxyvitamin-D, 1,25-dihydroxyvitamin-D, and prostate cancer: A nested case-control study [PDF]

, 2014
Vitamin D pathway single nucleotide polymorphisms (SNPs) are potentially useful proxies for investigating whether circulating vitamin D metabolites [total 25-hydroxyvitamin-D, 25(OH)D; 1,25-dihydroxyvitamin, 1,25(OH)2D] are causally related to prostate ...
Bonilla, Carolina, Donovan, Jenny L., Evans, David M., Fraser, William D., Gilbert, Rebecca, Hamdy, Freddie C., Kemp, John P., Lane, J. Athene, Lathrop, Mark, Lewis, Sarah, Martin, Richard M., Metcalfe, Chris, Neal, David E., Smith, George Davey   +13 more
core   +4 more sources

Quantifying environmental risk factors for multiple sclerosis in discordant monozygotic twins: a case report [PDF]

, 2015
Relative contribution of genetic and environmental risk factors in complex disorders is widely explored through discordant identical twins. Multiple sclerosis is a demyelinating disease of the central nervous system in which the interplay of genetic and ...
Ashtari, Fereshteh, Bahreini, Seyed Amir, Jabalameli, M. Reza, Zahednasab, Hamid   +3 more
core   +1 more source

Dynamic changes in serum 25-hydroxyvitamin D during pregnancy and lack of effect on thyroid parameters.

PLoS ONE, 2014
Background & aimsTo explore vitamin D status and its dynamic changes during pregnancy in women living in Northeast China. The association between 25-hydroxyvitamin D and serum calcium, phosphate and parathyroid hormone was studied.
Yuhang Zhao, Wei Miao, Chenyang Li, Xiaohui Yu, Zhongyan Shan, Haixia Guan, Weiping Teng   +6 more
doaj   +1 more source

Pitfalls with Vitamin D Research in Musculoskeletal Disorders and Recommendations on How to Avoid Them

JCRPE, 2019
Reports suggesting that vitamin D may have extraskeletal roles have renewed interest in vitamin D research and stimulated publication of an increasing number of new studies each year. These studies typically assess vitamin D status by measuring the blood
Gary M. Kiebzak, Kevin M. Neal, Pooya Hosseinzadeh, Robert C. Olney, Michael A. Levine   +4 more
doaj   +1 more source

The relationship between serum 25-hydroxyvitamin D and parathyroid hormone concentration in assessing vitamin D deficiency in pet rabbits

BMC Veterinary Research, 2020
Background Vitamin D deficiency and related metabolic bone diseases in pet rabbits have been intermittently debated. In human research, the parathyroid hormone concentration in relation to the 25-hydroxyvitamin D concentration is used to determine ...
J. Mäkitaipale, S. Sankari, H. Sievänen, O. Laitinen-Vapaavuori   +3 more
doaj   +1 more source

Higher serum vitamin D3 levels are associated with better cognitive test performance in patients with Alzheimer's disease [PDF]

, 2008
Background/Aims: Recent studies suggest that vitamin D metabolites may be important for preserving cognitive function via specific neuroprotective effects. No large studies have examined the association between vitamin D status and cognition. Methods: In
Bischoff-Ferrari HA, Bischoff-Ferrari HA, Bittles AH, C. Oudshoorn, Crinelli RM, Doraiswamy PM, E.M. Colin, Epstein AM, F.U.S. Mattace-Raso, Hathcock JN, Knopman DS, Lips P, Lips P, McKhann G, Morley JE, N. van der Velde, Semba RD, Sonnenberg J, Sutherland MK, T.J.M. van der Cammen, Van der Cammen TJ, Van der Cammen TJ, Whitehouse PJ   +22 more
core   +3 more sources

Effects of vitamin D2-fortified bread v. supplementation with vitamin D2 or D3 on serum 25-hydroxyvitamin D metabolites: an 8-week randomised-controlled trial in young adult Finnish women [PDF]

, 2016
There is a need for food-based solutions for preventing vitamin D deficiency. Vitamin D3(D3) is mainly used in fortified food products, although the production of vitamin D2(D2) is more cost-effective, and thus may hold opportunities. We investigated the
Cashman, Kevin D., Erkkola, Maijaliisa, Itkonen, Suvi T., Jakobsen, Jette, Lamberg-Allardt, Christel, Saaristo, Pilvi, Saarnio, Elisa M., Skaffari, Essi   +7 more
core   +1 more source