Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Comment
. 2021 Apr 8;20(1):34.
doi: 10.1186/s12937-021-00682-9.

Reply to: Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data

Seyyed Mostafa Arabi  1 , Golnaz Ranjbar  1 , Leila Sadat Bahrami  1 , Abdolreza Norouzy  2
Affiliations
Comment

Reply to: Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data

Seyyed Mostafa Arabi et al. Nutr J. .
No abstract available

PubMed Disclaimer

Conflict of interest statement

None of the authors have any conflict of interest to declare.

Figures

Fig. 2
Fig. 2
Forest plot showing results of a meta-analysis on the effects of vitamin D supplementation on hemoglobin. Data were reported as SMDs with 95% CIs
Fig. 3
Fig. 3
Forest plot showing results of a meta-analysis on the effects of vitamin D supplementation on ferritin. Data were reported as SMDs with 95% CIs
Fig. 4
Fig. 4
Forest plot showing results of a meta-analysis on the effects of vitamin D supplementation on transferrin saturation. Data were reported as MDs with 95% CIs
Fig. 5
Fig. 5
Forest plot showing results of a meta-analysis on the effects of vitamin D supplementation on iron levels. Data were reported as SMDs with 95% CIs
See this image and copyright information in PMC

Comment on

References

    1. Zimorovat A, Mohammadi-Sartang M, Barati-Boldaji R, et al. Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data. Nutr J. 2021;20:22. 10.1186/s12937-021-00681-w. - PMC - PubMed
    1. Arabi SM, Ranjbar G, Bahrami LS, et al. Correction to: The effect of vitamin D supplementation on hemoglobin concentration: a systematic review and meta-analysis. Nutr J. 2021;20:21. 10.1186/s12937-021-00679-4. - PMC - PubMed
    1. Higgins JP, Thomas J, Chandler J, Cumpston M, Li T, Page MJ, et al. Cochrane handbook for systematic reviews of interventions: Wiley; 2019. 16.5.4 How to include multiple 173 groups from one study. Available from: https://handbook-5-174 1.cochrane.org/chapter_16/16_5_4_how_to_include_multiple_groups_from_one... - PMC - PubMed
    1. Jackson JK, Patterson AJ, MacDonald-Wicks LK, Oldmeadow C, McEvoy MA. The role of inorganic nitrate and nitrite in cardiovascular disease risk factors: a systematic review and meta-analysis of human evidence. Nutr Rev. 2018;76(5):348–371. doi: 10.1093/nutrit/nuy005. - DOI - PubMed
    1. Mazidi M, Rezaie P, Vatanparast H. Impact of vitamin D supplementation on C-reactive protein; a systematic review and meta-analysis of randomized controlled trials. BMC Nutr. 2018;4(1):1. doi: 10.1186/s40795-017-0207-6. - DOI - PMC - PubMed