ReviewNutrients2019
Dietary Protein and Amino Acids in Vegetarian Diets-A Review.
Review in Nutrients, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 155 papers, 4 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
155 citing papers in PubMed, 4 syntheses or guidelines pooled it.
- Vegetarian Diet and Dietary Intake, Health, and Nutritional Status in Infants, Children, and Adolescents: A Systematic Review.Nutrients · 2025Pooled it
- Reducing meat and/or dairy consumption in adults: a systematic review and meta-analysis of effects on protein intake, anthropometric values, and body composition.Nutrition reviews · 2024Pooled it
- Sustainable Diets as Tools to Harmonize the Health of Individuals, Communities and the Planet: A Systematic Review.Nutrients · 2022Pooled it
- Free-Living Dietary Intake in Tactical Personnel and Implications for Nutrition Practice: A Systematic Review.Nutrients · 2021Pooled it
- Postbiotic Supplementation Increases Amino Acid Absorption from Plant-Based Meal: A Placebo-Controlled, Randomized, Double-Blind, Crossover Study.Probiotics and antimicrobial proteins · 2025Trial
- Meals Containing Equivalent Total Protein from Foods Providing Complete, Complementary, or Incomplete Essential Amino Acid Profiles do not Differentially Affect 24-h Skeletal Muscle Protein Synthesis in Healthy, Middle-Aged Women.The Journal of nutrition · 2024Trial
- Effect of a multidisciplinary lifestyle intervention on body composition in people with osteoarthritis: Secondary analysis of the "Plants for Joints" randomized controlled trial.Osteoarthritis and cartilage open · 2024Trial
- Probiotic Administration Increases Amino Acid Absorption from Plant Protein: a Placebo-Controlled, Randomized, Double-Blind, Multicenter, Crossover Study.Probiotics and antimicrobial proteins · 2020Trial
- Physiological Adaptation to Plant-Based Diets: A Homeostatic Framework for Sustained Dietary Change.Biology · 2026Review
- Dietary patterns and mortality in clinical obesity: comparative risks of meat-based, pescatarian, and vegetarian diets.Nutrition journal · 2026Article
- Diet Quality, Food Processing, and Nutrient Adequacy in Vegan, Vegetarian, and Omnivorous Dietary Patterns: A Critical Narrative Review.Nutrients · 2026Review
- Chemical and Functional Characterization of a Novel European Black Soybean Variety.Molecules (Basel, Switzerland) · 2026Article
- Estimating Animal and Plant Protein Intakes in Diet Assessed by Automated Self-Administered 24-h Recall (ASA24) and Food Records.Current developments in nutrition · 2026Article
- Article
- Comparative Nutritional and Physicochemical Profiling of Five Quinoa (Life (Basel, Switzerland) · 2026Article
- Protein Paradox: Protein Quality Based on Amino Acids Composition is Poorly Associated with Health Outcomes.Current nutrition reports · 2026Review
- Plant-based analogues to meat and dairy for sustainable food systems.The Proceedings of the Nutrition Society · 2026Review
- Dietary protein intake in relation to metabolic syndrome reversion: findings from the Tehran lipid and glucose study.Scientific reports · 2026Article
- Urate-lowering effect of delphinidin-3-glucoside in red kidney beans via binding to the FAD site of the XO enzyme.Journal of advanced research · 2026Article
- Enhanced Antiplatelet Activity of Nitrated Fatty Acid Extracts fromMolecules (Basel, Switzerland) · 2026Article
95 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
While animal products are rich in protein, the adequacy of dietary protein intake from vegetarian/vegan diets has long been controversial. In this review, we examine the protein and amino acid intakes from vegetarian diets followed by adults in western countries and gather information in terms of adequacy for protein and amino acids requirements, using indirect and direct data to estimate nutritional status. We point out that protein-rich foods, such as traditional legumes, nuts and seeds, are sufficient to achieve full protein adequacy in adults consuming vegetarian/vegan diets, while the question of any amino acid deficiency has been substantially overstated. Our review addresses the adequacy in changes to protein patterns in people newly transitioning to vegetarian diets. We also specifically address this in older adults, where the issues linked to the protein adequacy of vegetarian diets are more complex. This contrasts with the situation in children where there are no specific concerns regarding protein adequacy because of their very high energy requirements compared to those of protein. Given the growing shifts in recommendations from nutrition health professionals for people to transition to more plant-based, whole-food diets, additional scientific evidence-based communications confirming the protein adequacy of vegetarian and vegan diets is warranted.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.