Sodium restriction has been recommended in chronic heart failure for decades. However, the evidence about the benefit of this measure is not clear, and it might even increase risks. Searching in Epistemonikos database, which is maintained by screening multiple databases, we identified three systematic reviews incorporating 13 studies addressing the question of this article, 10 were randomized trials. We extracted data, combined the evidence using meta-analysis and generated a summary of findings table following the GRADE approach. We concluded sodium restriction might increase mortality and the risk of hospital admission in chronic heart failure, but the certainty of the evidence is low.