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53 Possible Causes for 25-OH-Vitamin D Decreased

  • Sunburn

    Older adults need higher amounts of vitamin D owing to decreased absorption, 195 and at any age, serum 25(OH)D rises as an inverse power function of vitamin D intake. 196[doi.org] Vitamin D metabolites help maintain a normal calcium gradient in the colon epithelial crypts, 188 and high serum levels of 25(OH)D are associated with markedly decreased proliferation[doi.org]

  • Osteoporosis

    Characteristics of studies in comparisons 1 to 4 Comparison 1: Vitamin D [D2, D3 or 25(OH)D] versus control or placebo Trial name in decreasing order of size Number recruited[doi.org] A French study reported that supplementation with 500 mg calcium and 400 IU of vitamin D given to women with serum 25(OH)D 12 ng/mL, compared with placebo significantly decreased[web.archive.org] D [D2, D3 or 25(OH)D] versus calcium Trial name in decreasing order of size Number recruited Setting Previous fracture Y/N Male or female?[doi.org]

  • Rickets

    Diagnosis of Vitamin D Deficiency Vitamin D deficiency is diagnosed by measuring the level of 25-hydroxy-vitamin D (25-OH-D) in the blood serum.[adoptionnutrition.org] It is estimated that the half-life of serum 25(OH)D is 3 wk; therefore, even if neonates do not receive an exogenous supply of vitamin D during the first weeks of life, 25[doi.org] Vitamin D dependent rickets- failure to convert 25 OH to 1,25 diOH. Autosomal recessive.[pedclerk.bsd.uchicago.edu]

  • Nestor-Guillermo Progeria Syndrome

    We were unfortunately unable to download the information for this disease from OMIM. Prevalence of clinical parameters (%) List of symptoms Symptom/sign Organ system Percent affected Pubmed id Added on(yyyy-mm-dd) Short stature skeletal 100 % 21932319 2013-08-06 Facial dysmorphism skeletal 100 % 21932319[…][brain-aging.com]

  • Vitamin D

    The CVD risk increased monotonically across decreasing 25(OH)-vitamin D below 60 nmol/L, with a relative risk of 1.03 (95% confidence interval, 1.00-1.06) per 25-nmol/L decrement[ncbi.nlm.nih.gov] CONCLUSION: There was no overall influence of latitude on 25(OH)D. However, in separate analyses 25(OH)D decreased with latitude in Caucasians but not in non-Caucasians.[ncbi.nlm.nih.gov] […] in 25(OH)-vitamin D.[doi.org]

  • Senile Osteoporosis

    For all subjects, serum 25-hydroxyvitamin D [25(OH)D] did not decrease with age, but serum 1,25-dihydroxyvitamin D [1,25(OH)2D], the physiologically active vitamin D metabolite[ncbi.nlm.nih.gov] […] conversion of 25-OH-D to 1,25(OH)2D.[ncbi.nlm.nih.gov] Treatment of osteoporosis with either sex steroids (by antagonizing the effect of PTH on bone resorption) or orally administered calcium with or without vitamin D (by decreasing[ncbi.nlm.nih.gov]

  • Hypervitaminosis D

    Serum levels of 25(OH) D are a better indicator of hypervitaminosis D than 1, 25(OH) D because 25(OH) D has a longer half-life.[ijn.mums.ac.ir] Conclusion There was no overall influence of latitude on 25(OH)D. However, in separate analyses 25(OH)D decreased with latitude in Caucasians but not in non-Caucasians.[doi.org] For the Lipid Research Clinic Programme method, relative decreases of 31 3% (DBP) and 18 2% (25(OH)-vitamin D 3 ) ( n 5) were obtained.[doi.org]

  • Pseudovitamin D Deficiency

    […] synthesis of 25-OH vitamin D Liver failure 24 Holick M.[slideplayer.com] Pediatric Considerations NHANES data suggest 70% of children do not have sufficient 25-OH vitamin D serum levels (9% deficient and 61% insufficient); associated with an increase[unboundmedicine.com] Tumor-induced osteomalacia (TIO) is caused by the tumor’s production of FGF23, which results in phosphaturia and a decrease in the renal production of 1,25(OH) 2 D.[jci.org]

  • Hypercalcemia

    Analysis of vitamin D subtypes revealed normal levels of both 25-OH Vitamin D2 and 25-OH Vitamin D3, whereas the level of activated vitamin D, 1,25 OH Vitamin D3, also referred[ncbi.nlm.nih.gov] OUTCOMES: Six months later, she displayed normal serum calcium, 25-OH vitamin D and 1,25-dihydroxyvitamin D levels.[ncbi.nlm.nih.gov] CONCLUSION: The fact that plasma calcitriol decreased after initiation of oncological treatment and the finding that hypercalcemia did not recur during treatment support the[ncbi.nlm.nih.gov]

  • Vitamin D Deficiency with Rickets

    Diagnosis of Vitamin D Deficiency Vitamin D deficiency is diagnosed by measuring the level of 25-hydroxy-vitamin D (25-OH-D) in the blood serum.[adoptionnutrition.org] Once vitamin D supplements have been decreased to 400 IU /day with normal PTH and 25(OH)D, calcium supplementation is usually not necessary [19].[indianpediatrics.net] The normal concentration of this form of vitamin D ranges from 25 to 50 ng/ml. Deficiency occurs when this level decreases to about 11 or 12 ng/ml or less.[adoptionnutrition.org]

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