scholarly journals Seasonal variation in the serum 25-hydroxyvitamin D levels of young and elderly active and inactive adults in São Paulo, Brazil

2013 ◽  
Vol 5 (1) ◽  
pp. 211-217 ◽  
Author(s):  
Sergio Setsuo Maeda ◽  
Gabriela Luporini Saraiva ◽  
Lilian Fukusima Hayashi ◽  
Maysa Seabra Cendoroglo ◽  
Luiz Roberto Ramos ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Sao Paulo ◽  
São Paulo ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

Association between 25-hydroxyvitamin D and inflammatory biomarker levels in a cross-sectional population-based study, São Paulo, Brazil

2016 ◽  
Vol 36 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Wysllenny N. de Souza ◽  
Marina M. Norde ◽  
Érica Oki ◽  
Marcelo M. Rogero ◽  
Dirce M.L. Marchioni ◽  
...  
Keyword(s):  
Population Based ◽  
Sao Paulo ◽  
São Paulo ◽  
Cross Sectional ◽  
Population Based Study ◽  
Inflammatory Biomarker ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

Influence of ultraviolet radiation on the production of 25 hydroxyvitamin D in the elderly population in the city of São Paulo (23 o 34’S), Brazil

2005 ◽  
Vol 16 (12) ◽  
pp. 1649-1654 ◽  
Author(s):  
Gabriela Luporini Saraiva ◽  
Maysa Seabra Cendoroglo ◽  
Luiz Roberto Ramos ◽  
Lara Miguel Quirino Araújo ◽  
José Gilberto H. Vieira ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Elderly Population ◽  
The Elderly ◽  
Sao Paulo ◽  
São Paulo ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D ◽  
The City

scholarly journals High frequency of deficient consumption and low blood levels of 25-hydroxyvitamin D in HIV-1-infected adults from São Paulo city, Brazil

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Stephanie Hael Sales ◽  
Sandra Maria Matta ◽  
Daniela Cardeal da Silva ◽  
Tatiane Assone ◽  
Luiz Augusto M. Fonseca ◽  
...  
Keyword(s):  
Vitamin D ◽  
Sao Paulo ◽  
Antiretroviral Drugs ◽  
Blood Levels ◽  
São Paulo ◽  
Hydroxyvitamin D ◽  
Increased Risk ◽  
Vitamin D Levels ◽  
25 Hydroxyvitamin D ◽  
Hiv 1

Abstract Micronutrient deficiency is common in patients with HIV/AIDS, usually caused by mal-absorption and/or drug interactions. 25-hydroxyvitamin D is of fundamental importance for the homeostasis of musculoskeletal health. The current study aimed to evaluate the nutritional status of HIV-infected subjects in order to make their nutritional diagnoses, including their vitamin D blood levels and to estimate their consumption of vitamin D. The study included 98 HIV-1-infected subjects, followed at University of São Paulo Medical School - HC-FMUSP. We performed a nutritional evaluation, along with the determination of patients’ serum 25-hydroxyvitamin D and calcium concentration, biochemical analyses and an anthropometric assessment. In the medical interview a 24-hour food recall was used (R24) to estimate daily calorie intake, macronutrients, calcium and vitamin D. A high level of vitamin D deficiency was observed in our patients: 83.4% of them had levels below 30 ng/ml; they also presented an increased risk of cardiovascular disease, along with a high consumption of dietary fat. Factors related to the virus itself and to the use of antiretroviral drugs may have contributed for the low vitamin D levels seen in our HIV-1-infected patients.

25-Hydroxyvitamin D Delayed Response to Seasonal Ultraviolet Radiation Type B Variation: The São Paulo Vitamin D Evaluation Study (SPADES)

2011 ◽  
pp. P2-126-P2-126
Author(s):  
Sergio Setsuo Maeda ◽  
Gabriela Luporini Saraiva ◽  
Lilian F Hayashi ◽  
Maysa Seabra Cenderoglo ◽  
Luiz Roberto Ramos ◽  
...  
Keyword(s):  
Vitamin D ◽  
Ultraviolet Radiation ◽  
Evaluation Study ◽  
Sao Paulo ◽  
Delayed Response ◽  
São Paulo ◽  
Type B ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D ◽  
Radiation Type

scholarly journals Erratum: High frequency of deficient consumption and low blood levels of 25-hydroxyvitamin D in HIV-1-infected adults from São Paulo city, Brazil

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Stephanie Hael Sales ◽  
Sandra Maria Matta ◽  
Daniela Cardeal da Silva ◽  
Tatiane Assone ◽  
Luiz Augusto M. Fonseca ◽  
...  
Keyword(s):  
High Frequency ◽  
Sao Paulo ◽  
Blood Levels ◽  
São Paulo ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D ◽  
Hiv 1

scholarly journals Vitamin D Status and Seasonal Variation among Danish Children and Adults: A Descriptive Study

Nutrients ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1801 ◽  
Author(s):  
Louise Hansen ◽  
Anne Tjønneland ◽  
Brian Køster ◽  
Christine Brot ◽  
Rikke Andersen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Seasonal Variation ◽  
Vitamin D Status ◽  
Hydroxyvitamin D ◽  
Supplement Use ◽  
Wide Range ◽  
Adults And Children ◽  
25 Hydroxyvitamin D ◽  
Vitamin D Supplement ◽  
Very High

The aim of the present study was to describe vitamin D status and seasonal variation in the general Danish population. In this study, 3092 persons aged 2 to 69 years (2565 adults, 527 children) had blood drawn twice (spring and autumn) between 2012 and 2014. A sub-sample of participants had blood samples taken monthly over a year. Serum 25-hydroxyvitamin D (25(OH)D) concentrations were measured by liquid chromatography mass spectrometry, and information on supplement use was assessed from questionnaires. Seasonal variations in 25(OH)D concentrations were evaluated graphically and descriptively, and status according to age, sex, and supplement use was described. It was found that 86% of both adults and children were vitamin D-sufficient in either spring and or/autumn; however, many had a spring concentration below 50 nmol/L. A wide range of 25(OH)D concentrations were found in spring and autumn, with very low and very high values in both seasons. Among adults, women in general had higher median 25(OH)D concentrations than men. Furthermore, vitamin D supplement use was substantial and affected the median concentrations markedly, more so during spring than autumn. Seasonal variation was thus found to be substantial, and bi-seasonal measurements are vital in order to capture the sizable fluctuations in vitamin D status in this Nordic population.

Seasonal variations of serum 1,25-dihydroxyvitamin D3 and alkaline phosphatase in relation to the antler formation in the fallow deer (Dama dama L.)

1984 ◽  
Vol 107 (1) ◽  
pp. 141-144 ◽  
Author(s):  
B. Eiben ◽  
St. Scharla ◽  
K. Fischer ◽  
H. Schmidt-Gayk
Keyword(s):  
Alkaline Phosphatase ◽  
Seasonal Variation ◽  
Serum Alkaline Phosphatase ◽  
Serum Levels ◽  
Fallow Deer ◽  
Dama Dama ◽  
Dihydroxyvitamin D3 ◽  
Hydroxyvitamin D ◽  
1,25 Dihydroxyvitamin D3 ◽  
25 Hydroxyvitamin D

Abstract. Serum 1,25-dihydroxyvitamin D3 and serum alkaline phosphatase increased several fold during the antler formation period in July. Both maxima were observed in the second half of the antler formation period, where the mineralization of the antler takes place. In contrast serum levels of calcium and 25-hydroxyvitamin D3 showed no alternation or seasonal variation.

scholarly journals Hypovitaminosis D in an Italian population of healthy subjects and hospitalized patients

1999 ◽  
Vol 81 (2) ◽  
pp. 133-137 ◽  
Author(s):  
Elisabetta Romagnoli ◽  
Patrizia Caravella ◽  
Liliana Scarnecchia ◽  
Paolo Martinez ◽  
Salvatore Minisola
Keyword(s):  
Vitamin D ◽  
Seasonal Variation ◽  
Postmenopausal Women ◽  
Healthy Subjects ◽  
Hypovitaminosis D ◽  
Hospitalized Patients ◽  
Italian Population ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D ◽  
Group D

The present study aimed to investigate the prevalence and seasonal variation of hypovitaminosis D (defined as serum 25-hydroxyvitamin D level below 30 nmol/l) among healthy subjects and hospitalized patients living in central Italy. We studied 297 subjects, 131 in February 1997 and 166 in July 1997, subdivided into four groups: (a) young healthy blood donors; (b) healthy postmenopausal women; (c) inpatients with various medical diseases and (d) inpatients engaged in long-term rehabilitation programmes because of various neurological disorders. In all subjects and patients serum levels of 25-hydroxyvitamin D were measured by radioimmunoassay. We found a significant seasonal variation (P< 0·0001) of serum 25-hydroxyvitamin D levels, mean values being higher in summer in all groups, except in patients with a longer hospitalization time (group (d)). In each group, a significantly higher prevalence of hypovitaminosis D was found in winter compared with summer time (P< 0·001), being unexpectedly high in postmenopausal women (winter 32 % and summer 4·5 %); furthermore, in both seasons, inpatients were characterized by the highest incidences of hypovitaminosis, particularly those in group (d) (winter 82·3 % and summer 57·8 %). The results of the present study emphasize the importance of 25-hydroxyvitamin D measurement, and the need to increase vitamin D intake in Italy; foodstuff fortification and supplement use must be considered in order to prevent negative effects of vitamin D deficiency on skeletal integrity.

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