A Meta-Analysis on Vitamin D Supplementation and Asthma Treatment
Frontiers in Nutrition 06 July 2022 doi: 10.3389/fnut.2022.860628
Meiqi Liu1, Jun Wang2 andXinrong Sun1*
1 Department of Respiratory Medicine, Xi’an Chiidren’s Hospital, Xi’an Jiaotong University, Xi’an, China,2 Department and Institute of Infectious Disease, Xi’an Chiidren’s Hospital, Xi’an Jiaotong University, Xi’an, China
Background: Vitamin D, as an immunomodulator, may be related to the therapeutic effect of asthma patients, but the research in this area is still controversial. The aim of this meta-analysis was to analyze the role of vitamin D supplementation in the treatment of asthma patients.
Materials and Methods: Randomized Controlled Trials (RCTs) of vitamin D supplementation in asthma were searched in PubMed, EMBASE, and the Cochrane library. Primary outcomes were forced expiratory volume in one second (FEV1), asthma exacerbations, Asthma Control Test scores (ACT scores), and fractional exhaled nitric oxide (FENO).
Results: A total of 10 RCTs were included, including 1,349 patients. Vitamin D supplementation didn’t affect the ACT scores (SMD = 0.04, 95% CI = -0.13 to 0.21, P = 0.87), FEV1 (SMD = 0.04, 95% CI = -0.35 to 0.43, P < 0.01) and FENO (SMD = -0.01, 95% CI = -0.22 to 0.20, P = 0.27), but reduced the rate of asthma exacerbations (RR = 0.69, 95% CI = 0.41 to 0.88, P < 0.01), especially in subgroups of children (RR = 0.46, 95% CI = 0.30 to 0.70, P = 0.83) and follow up time less than 6 months (RR = 0.45, 95% CI = 0.32 to 0.63, P = 0.95). Additionally, though there was only one study included in the subgroup, it significantly enhanced FEV1 at the last visit for patients whose FEV1 baseline value was less than 70% (SMD = 0.94, 95% CI = 0.47 to 1.41).
Conclusion: Vitamin D supplementation can reduce asthma exacerbations, especially in children, and within 6 months of follow up time. In addition, vitamin D has a positive effect on improving FEV1 of patients whose FEV1 baseline value is less than 70%, but more RCTs are still needed to support this conclusion.
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VitaminDwiki - Overview Asthma and Vitamin D contains
- VitaminDWiki pages containing ASTHMA in title (162 as of Jan 2024)
- Asthma attacks reduced in half if Vitamin D level higher than 42 nanograms – RCT May 2014
- Started with 100,000 IU loading dose and has standard-of-care Asthma drug
- Asthma may be treated by Vitamin D if more than 40 ng for 12 months – Sept 2018
- Those with Asthma or COPD had half the response to Vitamin D – March 2020
- Those with Asthma need larger doses to get the same response.
- perhaps need gut-friendly Vitamin D
- Asthma occurrence rate reduced 3X by Vitamin D – 8 study meta-analysis - Aug 2021
- Asthma in child 2.3 X more likely if both parents asthmatic (unless add Vitamin D) – VDAART Nov 2018
- Adult-onset asthma 2X more likely if low vitamin D and not hyperallergenic – May 2018
- Children had poor lung function if mothers had low vitamin D while pregnant – Nov 2022
- 26 health factors increase the risk of COVID-19 – all are proxies for low vitamin D
- CDC list of high-risk for COVID-19 includes Asthma
- Child Asthma increased 2.1 X by antibiotics, Child milk allergy increased 4.4 X by PPI – April 2018
- Asthmatic children taking Corticosteroids had 2X more vitamin D intake, but lower levels – July 2017
- Traffic pollution increases asthma unless supplement with Vitamin D (mice) June 2018
- Childhood asthma problems eliminated for months by 600,000 IU of Vitamin D injection – June 2017
- Proof that Vitamin D Works 92 health problems prevented/treated as of Nov 2020
- Asthma has been proven to be treated by Vitamin D in at least 4 random controlled trials
- Childhood asthma still reduced 4 months after 800 IU of Vitamin D daily - RCT Feb 2016
- Respiratory Disease exacerbations (Asthma, CF, COPD) may be treated by Vitamin D – July 2019
- Women with asthma 35X more likely to be vitamin D deficient – Oct 2013
- If high vitamin D during pregnancy the child is 5X less likely to get asthma
- Asthma is treated by Vitamin D – now they are trying to understand why – Feb 2015
- Increase in vitamin D deficiency may partially explain increases in asthma and allergies – Jan 2015
- Why deficiencies in vitamin D and magnesium are linked to asthma Magnesium allows muscles to relax
- Babies 3.6X more likely to go to hospital for asthma if asthmatic mother had low vitamin D while pregnant – June 2019
- The worse the bronchial asthma, the lower the vitamin D – Jan 2017 has the following chart
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VitaminDWiki Meta-analyses with ASTHMA in title (13 as of July 2022)
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8 Asthma studies noticed the association with a poor vitamin D receptor
VitaminDWiki Vitamin D Receptor pages with ASTHMA in title
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