Findings In this meta-analysis of 20 randomized clinical trials (with 1878 participants) with an average 6 months of intervention, vegetarian diets were associated with significant improvements in low-density lipoprotein cholesterol by 6.8 mg/dL, hemoglobin A1c by 0.25%, and body weight by 3.4 kg., This review updated existing systematic reviews that were conducted by the 2020 Dietary Guidelines Advisory Committee and the Dietary Patterns Technical Expert Collaborative as part of the Dietary Patterns Systematic Reviews Project., We identified all relevant meta-analyses examining the association of different dietary patterns with cardiometabolic risk factors. We systematically searched PubMed and Scopus databases from their inception through October 2024 for systematic reviews and meta-analyses of RCTs., erns have demonstrated cardiovascular benefits, their comparative efectiveness remains unclear. This network meta-analysis (NM. ) systematically evaluates the impact of eight dietary, Inclusion criteria were RCTs conducted in an adult population, investigating the effects of different type of diets or dietary patterns on all-cause mortality and cardiovascular outcomes of interest. Data extraction for each study was conducted by 2 independent reviewers., Six dietary strategies were examined: energy deficit, Mediterranean-like diet, sodium reduction (salt reduction and substitution), the Dietary Approaches to Stop Hypertension (DASH) diet, alcohol reduction, and fish/fish oil consumption. Reviews were selected based on quality, recency, and relevance..