scholarly journals Influence of vitamin D provision on the course of acute respiratory infections in children

2021 ◽  
pp. 73-80
Author(s):  
Yu.V. Marushko ◽  
◽  
S.I. Esipova ◽  
T.V. Gishchak ◽  
◽  
...  
Keyword(s):  
Vitamin D ◽  
Respiratory Diseases ◽  
Conflicts Of Interest ◽  
Respiratory Infections ◽  
Vitamin D Supplementation ◽  
The Body ◽  
Skeletal System ◽  
D3 Receptors ◽  
The Relationship ◽  
Positive Effect

The review article provides data from modern studies confirming the multifaceted effect of vitamin D in the human body. Vitamin D3 receptors (VDRs) have been shown to be present in most organs and tissues of the body. This confirms the importance of vitamin D not only in the formation of the skeletal system, but also in many of its extraosseous effects. Calcitriol affects the modulation of cell growth, neuromuscular conduction, inflammation processes, and is also an important stimulator of innate immunity due to the synthesis of antimicrobial peptides that provide protection against bacteria and viruses. In recent years, the relationship between the concentration of vitamin D in the blood and the incidence of respiratory infections in children has been actively studied. Many studies have shown that low vitamin D status is characteristic of most children with respiratory infections, and an adequate level of 25(OH)D in serum has a positive effect on the frequency of these infections and the severity of their course. Most authors demonstrate the benefits of vitamin D supplementation in the prevention of respiratory diseases in children, but there is no consensus regarding the frequency and dosage of vitamin D. The authors declare that they have no conflicts of interest. Key words: vitamin D, children, deficiency, respiratory diseases, prevention.

scholarly journals Vitamin D supplementation –Is it the time to stop wasting money on vitamin D?

JMS SKIMS ◽  
2019 ◽  
Vol 22 (1) ◽  
Author(s):  
Shariq R Masoodi
Keyword(s):  
Vitamin D ◽  
Bone Health ◽  
Respiratory Infections ◽  
Vitamin D Supplementation ◽  
Increased Risk ◽  
Wide Range ◽  
Upper Respiratory ◽  
The Relationship

In recent years, vitamin D has received increased attention, as a number of studies have shown its link to the pathogenesis of various diseases. Apart from its benefits on bone health, vitamin D supplementation has been shown beneficial in reducing risk for many chronic diseases including autoimmune diseases, type 2 diabetes, heart disease, many cancers and infectious diseases. Vitamin deficiency has been associated with increased risk of elevated blood pressure, heart attack and stroke in studies. The relationship between vitamin D deficiency and the increased incidence of upper respiratory infections, asthma and eczema, among children, has been observed in several studies. Recent meta-analyzes showed a relationship between vitamin D administration during the early months of life and a lower incidence of type 1 diabetes later in life. Therefore, it is not surprising that Vitamin D supplementation is used to prevent and treat a wide range of diseases, and the use has increased considerably in the last decade.

scholarly journals Vitamin D dan paparan sinar matahari untuk mencegah COVID-19. Fakta atau mitos ?

2020 ◽  
Vol 7 (1A) ◽  
pp. 320-328
Author(s):  
Maria Mexitalia ◽  
Martvera Susilawati ◽  
Rina Pratiwi ◽  
JC Susanto
Keyword(s):  
Vitamin D ◽  
Skin Color ◽  
Respiratory Infections ◽  
Sun Exposure ◽  
Vitamin D Supplementation ◽  
The Body ◽  
High Dose ◽  
Vitamin D Metabolism ◽  
Vitamin D Levels

Latar Belakang : Paparan sinar matahari pada kulit merupakan cara terbaik untuk sintesis vitamin D. Kadar vitamin D yang adekuat dalam tubuh merupakan proteksi terhadap berbagai penyakit seperti penyakit degeneratif, kanker dan juga infeksi saluran napas. Beberapa penelitian menghubungkan kadar vitamin D yang rendah dengan morbiditas dan mortalitas COVID-19. Hal ini menyebabkan fenomena baru pada masyarakat yaitu kebiasaan berjemur. Tujuan : Artikel ini akan membahas tentang metabolisme vitamin D, peran sinar matahari dalam mengaktifkan vitamin D di dalam tubuh, dan peran vitamin D dalam berbagai penyakit, khususnya mekanisme imunitas untuk COVID-19. Diskusi : Vitamin D meningkatkan kekebalan alami seluler terutama dengan cara menginduksi peptida antimikroba, yang meliputi cathelicidin, LL-37, 1,25-dihdroxyvitamin D dan defensins. Selain itu vitamin D akan meningkatkan sekresi hidrogen peroksida pada sel monosit. Pemberian vitamin D dosis tinggi sebanyak 10.000 IU/hari selama beberapa minggu dilanjutkan 5000 IU/hari bermanfaat untuk mencegah COVID-19, walaupun hasilnya masih memerlukan penelitian lebih lanjut. Absorpsi sinar matahari ke dalam tubuh manusia dipengaruhi oleh warna kulit, penggunaan bahan pakaian dan tabir surya , dan luas pajanan. Paparan sinar matahari sebesar satu Minimal Erythemal Dose (MED) pada orang dewasa dapat meningkatkan konsentrasi vitamin D setara dengan suplementasi 10.000 – 25.000 IU. Penelitian pada bayi yang diberi paparan 3 kali seminggu @ 5 menit pada jam 10.00-14.00, dengan paparan 50% area tubuh selama 2 bulan, mendapatkan kenaikan 25(OH)D sebesar 8,9 ng/mL. Simpulan : Vitamin D yang diaktifkan oleh paparan sinar matahari sangat bermanfaat sebagai proteksi berbagai penyakit termasuk juga pada COVID-19, walaupun efektifitasnya masih memerlukan penelitian lebih lanjut. Kata Kunci : COVID-19, vitamin D, paparan sinar matahari   Background : The exposured of sunlight on the skin is the best way for vitamin D synthesis. Adequate vitamin D levels are protection against various diseases such as degenerative diseases, cancer and also respiratory infections. Several studies have linked between low vitamin D levels with COVID-19 morbidity and mortality. This causes a new phenomenon in the community, namely sunbathing. Purpose : This review rearticle will discuss about vitamin D metabolism, the role of sunlight in activating vitamin D in the body, and the role of vitamin D in various diseases, specifically the immune mechanism for COVID-19.Discussion : Vitamin D increases cellular innate immunity mainly by inducing antimicrobial peptides, which include cathelicidin, LL-37, 1,25-dihdroxyvitamin D and defensins, and also increase the secretion of hydrogen peroxide in monocyte cells. The administration of high-dose vitamin D of 10,000 IU / day for several weeks followed by 5000 IU / day is useful to prevent COVID-19, although the results still require further research. The sun exposure to activated vitamin D body is affected by skin color, using of clothing and sunscreen, and area of ??exposure. Sun exposure of one Minimum Erythemal Dose (MED) in adults can increase vitamin D concentrations equivalent to 10,000 - 25,000 IU vitamin D supplementation. Study on infants who were given exposure 3 times a week @ 5 minutes at 10:00 to 14:00, with exposure 50% of body surface area for 2 months, increased 25(OH)D of 8.9 ng/mL. Conclusion : Vitamin D which is activated by sun exposure is very useful as protection for various diseases including COVID-19, although its effectiveness still requires further research. Keywords : vitamin D, sun exposure, COVID-19.

THE BIOLOGICAL ROLE OF VITAMIN D

Vestnik ◽  
2021 ◽  
pp. 169-172
Author(s):  
Д.Т. Джатдоева ◽  
А.А. Гочияев ◽  
М.Б. Семенов ◽  
З.М. Каппушева
Keyword(s):  
Vitamin D ◽  
Respiratory Diseases ◽  
Postoperative Recovery ◽  
The Body ◽  
Uv Treatment ◽  
Protective Properties ◽  
Acute Respiratory Diseases ◽  
The Moment ◽  
Positive Effect

В статье рассматриваются заболевания, зависящие от уровня витамина D в организме, возможные методы коррекции его уровня и их последствия. Рассматривается зависимость организма -как единого целого от уровня данного витамина в крови. На данный момент во всем мире наблюдается глобальный дефицит витамина D, у всех пациентов, которые сдают данный анализ, которое так же было выявлено на фоне глобальной пандемии “COVID-19”. Влияние витамина D на иммунитет абсолютно точно доказано, и поэтому его дефицитное состояние может ухудшать течение различных заболеваний. Также витамин D выступает в качестве гормона, недостаток которого приводит к патологиям сердечно-сосудистой системы, рахиту, остеопорозу, сахарному диабету, ожирению и другим серьезным заболеваниям. Неоднократно рассматривалось влияние его уровня на постоперационное восстановление. В статье так же приводятся методы коррекции посредством UV в зимнее время, которое как показали данные является опасной. В статье описываются нейродегенеративные расстройства, на которых оказывает огромное влияние уровень данного витамина и его профилактика. Проанализировано влияние его уровня на здоровье пациенток в постменопаузе, приводящее к нежелательным последствиям в том числе и остеопорозу. Приведены примеры влияния на защитные свойства ротовой полости при пародонте и кариесе. Описывается влияние на процесс течения острых респираторных заболеваний у детей, а также влияние на течение болезни при сахарном диабете. The article discusses diseases that depend on the level of vitamin D in the body, possible methods of correcting its level and their consequences. The dependence of the body on the level of this vitamin in the blood is considered. At the moment, there is a global vitamin D deficiency worldwide, which was revealed during the global COVID-19 pandemic. The positive effect of vitamin D on the immune system has been proven, and therefore its deficiency can worsen the course of various diseases. Vitamin D also acts as a hormone, the lack of which leads to pathologies of the cardiovascular system, rickets, osteoporosis, diabetes, obesity, and other serious diseases. The influence of its level on postoperative recovery is also considered. In addition, the article provides methods of correction by means of UV treatment in winter, which, as the data has shown, is dangerous. The article describes neurodegenerative disorders, which are greatly influenced by the level of this vitamin and its prevention. The influence of its level on the health of postmenopausal patients, leading to undesirable consequences, including osteoporosis, is analyzed. Examples of the effect on the protective properties of the oral cavity in periodontal disease and caries are given. The article describes the effect on the course of acute respiratory diseases in children, as well as the effect on the course of the disease in diabetes mellitus.

scholarly journals The Assessment of the Supply of Calcium and Vitamin D in the Diet of Women Regularly Practicing Sport

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Michał Wrzosek ◽  
Jakub Woźniak ◽  
Dorota Kozioł-Kaczorek ◽  
Dariusz Włodarek
Keyword(s):  
Social Media ◽  
Vitamin D ◽  
Calcium Intake ◽  
Vitamin D Supplementation ◽  
The Body ◽  
Cutoff Point ◽  
Skeletal System ◽  
Food Frequency ◽  
Vitamin D Intake ◽  
Group Members

Introduction. The appropriate intake of calcium and vitamin D in women’s diet is significant for a proper maintenance of the skeletal system. Research Aim. The aim of the research was to assess the calcium and vitamin D supply in a diet among women regularly practicing sport. Methodology. The research was completed by 593 women at the age of 18–50 (median 25) who played sports regularly (at least 2 times a week). To assess the calcium and vitamin D intake, short Food Frequency Questionnaires for calcium and vitamin D (VIDEO-FFQ) were used. The examined group was provided with the questionnaires via social media. To assess intake levels, the authors applied the group-based cutoff point method (calcium norm was EAR 800 mg/day; vitamin D norm was AI 15 μg/day). Results. The median of calcium and vitamin D intake in a diet was 502 mg/day and 5.2 μg/day, respectively (Q25 and Q75 for calcium was 387 mg/day and 627 mg/day, respectively, and for vitamin D was 3.4 μg/day and 8.2 μg/day, respectively). In relation to the EAR norm for calcium and AI norm for vitamin D, 92.0% of the examined participants in a group demonstrated lower than recommended calcium intake levels and 97.3% showed lower than recommended vitamin D intake levels. Calcium and vitamin D supplementation was used by 13.1% (in this subgroup, 11.5% of the examined group members did not need it) and 56.8% of the examined women (in this subgroup, 2.4% of the examined group did not need it), respectively. After including the calcium and vitamin D intake, the supply median for the whole group was 535 mg/day and 28.8 μg/day, respectively (Q25 and Q75 for calcium was 402 mg/day and 671 mg/day, and for vitamin D was 6.3 µg/day and 55.7 μg/day, respectively); 87.5% of the examined participants did not meet the EAR norms for calcium and 42.0% did not meet the AI norm for vitamin D. Among the women supplementing calcium, 58.9% did not reach the reference intake value; however, all women supplementing vitamin D fulfilled the expected nutritional need. Conclusions. It is important to educate women about the necessity to provide the body with proper calcium and vitamin D intake levels in a diet in order to avoid health problems resulting from the deficit of the nutrients.

Evaluation of the hormonal and biochemical changes in obese and non-obese PCOS Iraqi women before and after vitamin D supplementation

2019 ◽  
Vol 9 (o3) ◽  
Author(s):  
Suaad Muhssen Ghazi ◽  
Fatin Shallal Farhan
Keyword(s):  
Vitamin D ◽  
Serum Vitamin ◽  
Follicular Development ◽  
High Body Mass Index ◽  
Vitamin D Supplementation ◽  
The Body ◽  
Obese People ◽  
Serum Vitamin D ◽  
Before And After ◽  
Granulose Cells

Vitamin D deficiency is common in women with polycystic ovarian syndrome. Vitamin D plays an important physiologic role in reproductive functions of ovarian follicular development and luteinization through altering anti-müllerian hormone signaling, follicular stimulating hormone activity and progesterone production in human granulose cells. Vitamin D is precipitated in adipose fat tissues, making it notable to be used for the body as a result; obese people with high body mass index are already highly expected to have low levels of serum vitamin D.

Vitamin D and sleep duration: Is there a bidirectional relationship?

2020 ◽  
Vol 41 (4) ◽  
Author(s):  
Maryam Mosavat ◽  
Aisling Smyth ◽  
Diana Arabiat ◽  
Lisa Whitehead
Keyword(s):  
Vitamin D ◽  
Sleep Duration ◽  
Vitamin D Supplementation ◽  
The Body ◽  
Bone Homeostasis ◽  
Limited Information ◽  
Physiological Processes ◽  
Vitamin D Levels ◽  
Bidirectional Relationship ◽  
Sleep Length

AbstractVitamin D contributes to numerous physiological processes within the body but primarily calcium and bone homeostasis. Emerging evidence highlights a novel role for vitamin D in maintaining and regulating optimal sleep. Sleep is a known regulator of bone health, highlighting the interconnectedness between vitamin D concentrations, sleep duration and bone metabolism. It is possible that the relationship between sleep length and vitamin D is bidirectional, with vitamin D playing a role in sleep health and conversely, sleep affecting vitamin D levels. Nevertheless, limited information on the direction of the interaction is available, and much remains to be learned concerning the complex relationship between insufficient sleep duration and vitamin D deficiency. Given the potential to implement interventions to improve sleep and vitamin D supplementation, understanding this relationship further could represent a novel way to support and improve health.

scholarly journals Immunological Aspects of SARS-CoV-2 Infection and the Putative Beneficial Role of Vitamin-D

2021 ◽  
Vol 22 (10) ◽  
pp. 5251
Author(s):  
Ming-Yieh Peng ◽  
Wen-Chih Liu ◽  
Jing-Quan Zheng ◽  
Chien-Lin Lu ◽  
Yi-Chou Hou ◽  
...  
Keyword(s):  
Vitamin D ◽  
Innate Immunity ◽  
T Cells ◽  
Adaptive Immunity ◽  
Cd4 T Cells ◽  
Vitamin D Supplementation ◽  
The Body ◽  
Alveolar Type ◽  
Tissue Destruction ◽  
Health Crisis

Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is still an ongoing global health crisis. Immediately after the inhalation of SARS-CoV-2 viral particles, alveolar type II epithelial cells harbor and initiate local innate immunity. These particles can infect circulating macrophages, which then present the coronavirus antigens to T cells. Subsequently, the activation and differentiation of various types of T cells, as well as uncontrollable cytokine release (also known as cytokine storms), result in tissue destruction and amplification of the immune response. Vitamin D enhances the innate immunity required for combating COVID-19 by activating toll-like receptor 2. It also enhances antimicrobial peptide synthesis, such as through the promotion of the expression and secretion of cathelicidin and β-defensin; promotes autophagy through autophagosome formation; and increases the synthesis of lysosomal degradation enzymes within macrophages. Regarding adaptive immunity, vitamin D enhances CD4+ T cells, suppresses T helper 17 cells, and promotes the production of virus-specific antibodies by activating T cell-dependent B cells. Moreover, vitamin D attenuates the release of pro-inflammatory cytokines by CD4+ T cells through nuclear factor κB signaling, thereby inhibiting the development of a cytokine storm. SARS-CoV-2 enters cells after its spike proteins are bound to angiotensin-converting enzyme 2 (ACE2) receptors. Vitamin D increases the bioavailability and expression of ACE2, which may be responsible for trapping and inactivating the virus. Activation of the renin–angiotensin–aldosterone system (RAS) is responsible for tissue destruction, inflammation, and organ failure related to SARS-CoV-2. Vitamin D inhibits renin expression and serves as a negative RAS regulator. In conclusion, vitamin D defends the body against SARS-CoV-2 through a novel complex mechanism that operates through interactions between the activation of both innate and adaptive immunity, ACE2 expression, and inhibition of the RAS system. Multiple observation studies have shown that serum concentrations of 25 hydroxyvitamin D are inversely correlated with the incidence or severity of COVID-19. The evidence gathered thus far, generally meets Hill’s causality criteria in a biological system, although experimental verification is not sufficient. We speculated that adequate vitamin D supplementation may be essential for mitigating the progression and severity of COVID-19. Future studies are warranted to determine the dosage and effectiveness of vitamin D supplementation among different populations of individuals with COVID-19.

scholarly journals Implications of Vitamin D Research in Chickens can Advance Human Nutrition and Perspectives for the Future

2021 ◽  
Author(s):  
Matthew F Warren ◽  
Kimberly A Livingston
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Vitamin D Supplementation ◽  
The Body ◽  
Human Nutrition ◽  
Vitamin D Metabolites ◽  
Vitamin D Metabolism ◽  
Related Research ◽  
Vitamin D Intake ◽  
Increased Risk

Abstract The risk of vitamin D insufficiency in humans is a global problem that requires improving ways to increase vitamin D intake. Supplements are a primary means for increasing vitamin D intake, but without a clear consensus on what constitutes vitamin D sufficiency, there is toxicity risk with taking supplements. Chickens have been used in many vitamin D-related research studies, especially studies involving vitamin D supplementation. Our state-of-the-art review evaluates vitamin D metabolism and how the different hydroxylated forms are synthesized. We provide an overview with how vitamin D is absorbed, transported, excreted, and what tissues in the body store vitamin D metabolites. We also discuss a number of studies involving vitamin D supplementation with broilers and laying hens. Vitamin D deficiency and toxicity are also described and how they can be caused. The vitamin D receptor (VDR) is important for vitamin D metabolism. However, there is much more that can be understood with VDR in chickens. Potential research aims involving vitamin D and chickens should explore VDR mechanisms which could lead to newer insights with VDR. Utilizing chickens in future research to help with elucidating vitamin D mechanisms has great potential to advance human nutrition. Finding ways to increase vitamin D intake will be necessary because the coronavirus 2019 disease (COVID-19) pandemic is leading to increased risk of vitamin D deficiency in many populations. Chickens can provide a dual purpose with addressing pandemic-caused vitamin D deficiency: 1) vitamin D supplementation gives chickens added value with possibly leading to vitamin D-enriched meat and egg products; and 2) chickens’ use in research provides data for translational research. Expanding vitamin D-related research in chickens to include more nutritional aims in vitamin D status has great implications with developing better strategies to improve human health.

PROVISION OF VITAMIN D FOR CHILDREN AND ADOLESCENTS IN THE CITY OF ULAN-UDE

2021 ◽  
Vol 100 (3) ◽  
pp. 295-300
Author(s):  
N.B. Gomboeva ◽  
◽  
E.I. Grigoryeva ◽  
Keyword(s):  
Vitamin D ◽  
Children And Adolescents ◽  
Vitamin D Deficiency ◽  
Respiratory Infections ◽  
Sharp Decrease ◽  
The Body ◽  
Severe Deficiency ◽  
Significant Difference ◽  
25 Oh Vitamin D ◽  
The City

The proven relationship between the frequency of influenza and acute respiratory infections in children with vitamin D deficiency and the data on the relationship between a high mortality rate from SARS-CoV-2 in patients with low levels of vitamin D in the body under conditions of a forced sharp decrease in the level of insolation in the period from March 11, 2020 dictated the relevance assessing the vitamin D supply of children and adolescents in educational organizations of the city of Ulan-Ude. Purpose of the study: to assess the vitamin D supply of children and adolescents living in the city of Ulan-Ude. Methods: in a non-randomized, single-center, transverse (one-stage) uncontrolled comparative study, the concentration of 25(OH) vitamin D – 25(OH)D – in the blood serum of children and adolescents in Ulan-Ude was studied from May 22 to May 24, 2020. Moderate vitamin D deficiency (deficiency) was determined when the content of 25(OH)D was in the range of 20–30 ng/ml, the deficiency was within the limits, and the severe deficiency was <10 ng/ml. Results: assessment of vitamin D provision was carried out in 60 children aged 10 to 17 years (15 [11; 16] years), of which 19 boys, 41 girls. Children were divided into 2 groups depending on age: 10–11 years old (grade 5) (n=27) and 15–17 years old (grades 9–11) (n=33). Deficiency of vitamin D was found in 4 (15%), 11 (33%); deficit – in 19 (70%), 18 (55%); severe deficiency – in 2 (7%), 4 (12%), respectively. Along with low indicators of the provision of children and adolescents in the city of Ulan-Ude, an even lower provision of children and adolescents of Buryats was noted. The concentration of vitamin D in Buryat children and adolescents below normal (less than 30 ng/ml) was found in 35 (100%) children and adolescents, deficiency – in 8 (23%) children, vitamin D deficiency – in 21 (60%) children and severe deficiency – in 6 (17%). A statistically significant difference in the content of 25(OH)D between children and adolescents of Russian nationality and Buryats was revealed (p=0,0056). Evaluation of the diet showed that the frequency of consumption of fish as a source of vitamin D by children and adolescents is low. Conclusion: there is a high incidence of vitamin D deficiency and deficiency, which amounted to 97% in the examined children and adolescents living in the city of Ulan-Ude, more pronounced in Buryat children and adolescents, which requires organizational measures to replenish the vitamin D deficiency.

scholarly journals Role of Vitamin D in Reducing the Frequency of Asthma Attacks in Patients with Frequent Exacerbation of Asthma

2021 ◽  
pp. 11-16
Author(s):  
Mubeen Ahmed Memon ◽  
Sheeba Faryal Ansari ◽  
Mumtaz Ali Lakho ◽  
Mukhtiar Hussain Jaffery ◽  
Syed Zulfiquar Ali Shah ◽  
...  
Keyword(s):  
Vitamin D ◽  
Corticosteroid Treatment ◽  
Vitamin D Supplementation ◽  
The Body ◽  
P Value ◽  
Care Hospital ◽  
Asthma Exacerbations ◽  
Vitamin D Levels ◽  
Interventional Group

Introduction: Vitamin D deficiency is common among asthmatics with literature suggesting that its low levels in the body may trigger exacerbations and decrease the response to corticosteroid treatment. It has also shown to inhibit the production of cytokines, which in turn enhances the body’s response to corticosteroid treatment during an exacerbation. Therefore, maintenance of adequate levels of vitamin D in patients with asthma may reduce the risk of exacerbation and improve their general health. This study aims to explore the role of vitamin D supplementation in preventing asthma exacerbations. Methods: This single blind parallel arm interventional study was conducted in the pulmonology ward in a tertiary care hospital from June 2018 to April 2020. Two hundred (n= 200) participants with a history of frequent acute exacerbation of asthma were enrolled in the study via consecutive convenient non-probability technique. Participants were divided into two groups; the placebo and the interventional group that received 200,000 IU of vitamin D capsule. Results: Compared to day 0, mean episodes of exacerbation in the interventional group were significantly lower after 180 days (1.1 ± 0.4 vs. 0.61 ± 0.3; p-value <0.0001). Similarly, number of asthma attacks in past 7 days was significantly lower in intervention group after 180 days (4.4 ± 2.7 vs. 3.1 ± 1.5; p-value 0.0001) Conclusion: Vitamin D supplementation is a safe and cost-friendly approach to reducing asthma exacerbations. It may also help to improve the condition in severe asthmatics with low vitamin D levels.

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