Vitamin D can safely reduce asthma exacerbations among corticosteroid-using children and adults with asthma: a systematic review and meta-analysis of randomized controlled trials
Nutr Res. 2021 Jun 13;92:49-61. doi: 10.1016/j.nutres.2021.05.010
Ziyu Chen 1, Chen Peng 1, Jinyu Mei 2, Lifa Zhu 1, Hua Kong 3
Vitamin D Dosing use in the trials
Red lines added by Vitamin D Life indicate where too low of dosing was used
Overview Asthma and Vitamin D contains
- Vitamin D Life pages containing ASTHMA in title (130 as of Aug 2021)
- Asthma occurrence rate reduced 3X by Vitamin D – 8 study meta-analysis - Aug 2021
- Asthma may be treated by Vitamin D if more than 40 ng for 12 months – Sept 2018
- 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
- 26 health factors increase the risk of COVID-19 – all are associated with 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
- Asthma attacks reduced in half if Vitamin D level higher than 42 nanograms – RCT May 2014 intervention
- 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
click on chart to see the study
Vitamin D Life pages containing ASTHMA in title (127 pages as of July 2021)
Previous studies have failed to draw a consistent conclusion over the effect of vitamin D administration on asthma. We hypothesized that vitamin D supplementation could improve the clinical efficacy of corticosteroids in patients with asthma as measured by exacerbations, Asthma Control Test (ACT) score, and lung function in order to maintain asthma control. We searched Web of Science, PubMed, the Cochrane Library, and ScienceDirect up through January 20, 2021 for randomized controlled trials analyzing the effect of vitamin D supplementation on asthma exacerbation. Studies were limited to patients with moderate to severe asthma who were treated with corticosteroids.
We identified 12 studies involving 1,543 participants in this meta-analysis. Vitamin D supplementation significantly reduced the risk of asthma exacerbation (pooled risk ratio (RR) 0.70, 95% confidence interval (CI), 0.59, 0.83; P < .05). The pooled RR of the ACT score was 0.04 (95% CI, -0.19, 0.27; P > .05). The pooled standardized mean difference in vitamin D levels was 1.07 (95% CI, 0.77, 1.38; P < .05), and in the percentage of forced expiratory volume in one second was -0.02 (95% CI, -0.13, 0.09; P > .05). The pooled RR of adverse events was 1.06 (95% CI, 0.89, 1.25; P > .05). We performed subgroup analysis and meta-regression of serum vitamin D levels but found no source of heterogeneity. Vitamin D supplementation safely reduced the rate of asthma exacerbation but did not improve ACT score or lung function among patients with asthma treated with corticosteroids.