Author, Year	Title	Randomization			Double Blinding			Withdrawals and Dropouts	Total
		Is There Any Reference to Randomization? (Yes/No: 1/0)	Is the Randomization Method Appropriate? (Yes/No: 1/0)	Is the Randomization Method Inappropriate? (Yes/No: −1/0)	Is There Any Reference to Double-Blind Testing? (Yes/No: 1/0)	Is the Double-Blind Method Appropriate? (Yes/No: 1/0)	Is the Double-Blind Method Inappropriate? (Yes/No: −1/0)	Is There a Description of Participants Who Discontinued or Dropped Out (Number and Reason)? (Yes/No: 1/0)
Chiewchalermsri et al., 2024 [29]	Randomized, double-blind, placebo-controlled trial of vitamin D supplementation in the build-up phase of house dust mite-specific immunotherapy.	1	0	0	1	1	0	1	4
Guo, 2023 [16]	Vitamin D supplementation improves the therapeutic effect of mometasone on allergic rhinitis.	1	1	0	0	0	0	0	2
Bhardwaj and Singh, 2021 [28]	Efficacy of vitamin D supplementation in allergic rhinitis.	1	0	0	0	0	0	0	1
Bakhshaee et al., 2019 [19]	Therapeutic effect of vitamin D supplementation on allergic rhinitis.	1	1	0	1	1	0	1	5
Jerzynska et al., 2016 [30]	The clinical effect of vitamin D supplementation combined with grass-specific sublingual immunotherapy in children with allergic rhinitis.	1	1	0	1	1	0	1	5