Fecha de publicación: -- Fuente: PubMed "meat" J Acad Nutr Diet. 2026 Nov 9:156929. doi: 10.1016/j.jand.2026.156929. Online ahead of print.ABSTRACTBACKGROUND: Hypertension is a global health issue, and a vegetarian diet has been represented as a key factor in blood pressure reduction by various observational studies and randomized clinical trials (RCTs).OBJECTIVE: This study aims to evaluate the impact of vegetarian diets on systolic blood pressure (SBP) and diastolic blood pressure (DBP) in adults.METHODS: A systematic review and meta-analysis of 20 RCTs were performed. PubMed, Scopus, and Web of Science were used to search for eligible RCTs up to July 7, 2025, in accordance with the PRISMA reporting guidelines and the search was rerun on March 10, 2026. Studies that compared blood pressure in adults aged 18 years or older who followed vegetarian diets devoid of meat and fish to those who followed control diets were included. Non-clinical trials were excluded. Random-effects models were used to pool data, subgroup analyses were conducted based on intervention duration and health status. Risk of bias was assessed using the Cochrane Collaboration tool, and the certainty of evidence was evaluated using the Grading of Recommendations Assessment, Development, and Evaluation approach.RESULTS: The pooled analysis of 21 effect sizes from 20 trials including 1,399 participants did not demonstrate a significant reduction in SBP (WMD: -1.08 mmHg; 95% CI: -2.58 to 0.41) or DBP (WMD: -0.35 mmHg; 95% CI: -1.47 to 0.77) with vegetarian diets consumption. Moderate heterogeneity was observed (I2 = 63.9% for SBP; 71.9% for DBP). Subgroup analysis based on trial duration or type 2 diabetes status did not alter the results. The risk of bias for most studies was unclear or low, and the certainty of evidence was rated moderate for both SBP and DBP because of inconsistency.CONCLUSIONS: There is inadequate evidence to conclude that vegetarian diets significantly reduce SBP or DBP in adults. Further well-designed, long-term randomized controlled trials with robust adherence monitoring are necessary to elucidate the role of vegetarian diets in managing blood pressure.PMID:43003386 | DOI:10.1016/j.jand.2026.156929