en public specific review article <div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times=""><span style="font-size:10.0pt"><span style="line-height:115%">The current systematic review was conducted to investigate the effects of vitamin D supplementation on vitamin D levels, bone health, and physical performance indices in adults with spinal cord injury (SCI). </span></span><b><span style="font-size:10.0pt"><span style="line-height:115%">Methods:</span></span></b><span style="font-size:10.0pt"><span style="line-height:115%"> The PubMed, Scopus, Web of Science, and Embase databases were searched for studies published up to June 2020, with no language limits. To determine the risk of bias, the Academy of Nutrition and Dietetics Quality criteria checklist was used. <em><b>Results:</b></em><em> </em></span></span><span style="font-size:10.0pt"><span style="line-height:115%">Eight studies that met all of the inclusion criteria were identified. All of the eligible studies had a high level of heterogeneity regarding outcome measures, study design, and the dose of vitamin D. The majority of the trials showed beneficial effects of vitamin D supplementation on serum vitamin D levels and other outcome measures in patients with SCI. Three randomized controlled trials revealed a low risk of bias, whilst other studies were rated as the &nbsp;either neutral or negative risk of bias. </span></span><em><b><span style="font-size:10.0pt"><span style="line-height:115%">Conclusion</span></span></b></em><b><span style="font-size:10.0pt"><span style="line-height:115%">:</span></span></b> <span style="font-size:10.0pt"><span style="line-height:115%"><span style="color:#131413">This review suggests that vitamin D supplementation could improve vitamin D levels, bone health, and physical performance indices in individuals with SCI. However, due to the high level of heterogeneity, the results should be interpreted with caution. Further studies on this population should be performed to have sufficient power and a robust design to give definitive conclusions.</span></span></span></span></span></span><br> &nbsp;</div> Spinal cord injury, Vitamin D, Systematic review. 325 339 http://jnfs.ssu.ac.ir/browse.php?a_code=A-10-462-1&slc_lang=en&sid=1 Hamed Mohammadi 0000-0003-2046-7356 No Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran Karim Parastouei parastouei@gmail.com 0000-0002-8087-663X Yes Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran Hosein Rostami 0000-0002-3090-8138 No Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran Maryam Miraghajani 0000-0002-8265-0335 No Nottingham Digestive Disease Centre and Biomedical Research Centre, School of Medicine, University of Nottingham, Nottingham, UK Masoumeh Rafiee 0000-0001-6097-9183 No Student Research Committee, Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran Abed Ghavami 0000-0001-6817-7812 No Student Research Committee, Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran Anastasia Viktoria Lazaridi 0000-0002-4610-6770 No The Early Life Research Unit, Division of Child Health, Obstetrics and Gynaecology, School of Medicine, University of Nottingham, Nottingham, UK