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META-ANALYSIS
Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Edward R Payne and others
Context The bioactive compounds found in tea from Camellia sinensis, namely theanine, caffeine, and polyphenols, can potentially improve short-term and long-term health outcomes. Objective The aim of this study was to assess the effects of tea, ...
Scoping Review
Diversity of Plant-Based Food Consumption: A Systematic Scoping Review on Measurement Tools and Associated Health Outcomes
Alice C Creedon and others
A scoping review of the literature was conducted to identify studies investigating plant-based food diversity and human health outcomes. Objectives were to (a) explore definition(s) of plant-based foods used, (b) identify assessment tools used to ...
META-ANALYSIS
A Meta-Analysis of the Effects of Gut Microbiota–Based Interventions on Gastrointestinal and Behavioral Symptoms in Children With Autism Spectrum Disorder
Xiuyan Gao and others
Context Despite an increasing body of research showing gut microbiota–based interventions can improve gastrointestinal (GI) symptoms and behavioral symptoms in both humans and animals, there are still disagreements about its impact on autism ...
META-ANALYSIS
Systematic Review and Meta-analysis of Randomized Clinical Trials Comparing Time-Restricted Eating With and Without Caloric Restriction for Weight Loss
Danielle Fernandes-Alves and others
Context Although it is well established that caloric restriction (CR) is the primary driver of weight loss, circadian-driven metabolic benefits have been recognized as possibly enhancing the effects of CR. Time-restricted eating (TRE) has emerged as ...
META-ANALYSIS
Association Among Vitamin D Receptor Gene Polymorphisms, Metabolic Control, and Inflammatory Markers in Type 2 Diabetes: A Systematic Review and Meta-Analysis
Ramara Kadija Fonseca Santos and others
Context Single-nucleotide polymorphisms (SNPs) in the vitamin D receptor (VDR) contribute to inadequate metabolic profiles in individuals with type 2 diabetes mellitus (T2DM). Objective We sought to elucidate the relationship among SNPs in the VDR ...
META-ANALYSIS
Diagnostic Value of a Global Leadership Initiative on Malnutrition Criteria in Patients with Malignant Tumors: A Systematic Review and Meta-Analysis
Zecheng Zhang and others
Context Malnutrition is a common complication of malignant tumors, and accurate diagnosis and treatment are essential. Although the Global Leadership Initiative on Malnutrition (GLIM) criteria are widely accepted for the diagnosis of malnutrition in ...
META-ANALYSIS
Community-Based Child Food Interventions/Supplements for the Prevention of Wasting in Children Up to 5 Years at Risk of Wasting and Nutritional Oedema: A Systematic Review and Meta-Analysis
Zohra S Lassi and others
Context Malnutrition poses a significant threat to child health, with millions of children worldwide affected by wasting, which increases the risk of morbidity and mortality. Objective In this study we sought to evaluate the effectiveness of ...
Systematic review
Effects of Probiotics Supplementation on Short-Chain Fatty Acids: A Systematic Review of Randomized Controlled Trials
Poliana Guiomar de Almeida Brasiel and Sheila Cristina Potente Dutra Luquetti
Context With the increased use of fermented products and probiotic foods, interest in knowing their benefits and safety of their intake is increasing. Objective The current systematic review investigated the effects of probiotics supplementation on ...
Systematic review
Effect of Time-Restricted Eating on Sleep Quality and Body Composition: A Systematic Review
Bianca A de Sousa and others
Context Time-restricted eating (TRE) is a dietary approach that consolidates energy intake in a restricted period during the day. It is an alternative approach to weight loss and might be important to sleep quality. Objective To review the current ...
META-ANALYSIS
Effects of Selenium Administration on Blood Lipids: A Systematic Review and Dose–Response Meta-Analysis of Experimental Human Studies
Teresa Urbano and others
Context Overexposure to the essential trace element selenium has been associated with adverse metabolic and cardiovascular outcomes, hypertension, and diabetes. However, dose–response meta-analyses analyzing the effects of selenium administration on ...
Letter to the Editor
Errors in a Meta-analysis on Vitamin C and COVID-19
Harri Hemilä and Elizabeth Chalker
Qin et al recently published a meta-analysis on vitamin C for COVID-19. 1 The abstract states they “searched for publications between January 2020 and December 2023 that met the inclusion criteria.” However, a relevant large randomized study 2 ...
Letter to the Editor
Author’s Reply: Letter to the Editor: Errors in a Meta-Analysis on Vitamin C and COVID-19
Maorong Qin and others
Third, the results for each of the 4 outcomes are presented individually in Figure 1 . In each of these clinically relevant outcomes, the administration of vitamin C to patients with COVID-19 may be tended toward a positive outcome or not. Although ...

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