Trial reportDiabetes care2009
Effects of a protein preload on gastric emptying, glycemia, and gut hormones after a carbohydrate meal in diet-controlled type 2 diabetes.
Trial report in Diabetes care, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 191 papers, 5 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
191 citing papers in PubMed, 5 syntheses or guidelines pooled it, 382 citations in OpenAlex.
- The Impact of Macronutrient Ordering on Postprandial Glycaemic Control in Diabetes: A Systematic Review.Endocrinology, diabetes & metabolism · 2026Pooled it
- Nutrient intake order on metabolic outcomes in type 2 diabetes: a systematic review and meta-analysis.Acta diabetologica · 2026Pooled it
- Effects of supplementation with milk protein on glycemic parameters: a GRADE-assessed systematic review and dose-response meta-analysis.Nutrition journal · 2023Pooled it
- Comparative effects of intraduodenal amino acid infusions on food intake and gut hormone release in healthy males.Physiological reports · 2017Pooled it
- Dairy foods and dairy proteins in the management of type 2 diabetes: a systematic review of the clinical evidence.Advances in nutrition (Bethesda, Md.) · 2015Pooled it
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- Pea protein preload improves postprandial glucose response in healthy adults: a randomized, double-blind, controlled pilot study.European journal of nutrition · 2026Trial
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- Investigating the effects of mycoprotein and guar gum on postprandial glucose in type 2 diabetes: a double-blind randomised controlled trial.Nutrition & diabetes · 2025Trial
- Comparative efficacy of preloading plant-based versus animal-based proteins in evoking insulin and incretin responses to attenuate postprandial glucose.European journal of nutrition · 2025Trial
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- Effect of medium-chain triglycerides and whey protein isolate preloads on glycaemia in type 2 diabetes: a randomized crossover study.The American journal of clinical nutrition · 2025Trial
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- A ketone monoester drink reduces postprandial blood glucose concentrations in adults with type 2 diabetes: a randomised controlled trial.Diabetologia · 2024Trial
- Effect of vegetable consumption with chewing on postprandial glucose metabolism in healthy young men: a randomised controlled study.Scientific reports · 2024Trial
- Effect of gastric distension with concurrent small intestinal saline or glucose infusion on incretin hormone secretion in healthy individuals: A randomized, controlled, crossover study.Diabetes, obesity & metabolism · 2023Trial
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131 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
9 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveWe evaluated whether a whey preload could slow gastric emptying, stimulate incretin hormones, and attenuate postprandial glycemia in type 2 diabetes. RESEARCH DESIGN AND
methodsEight type 2 diabetic patients ingested 350 ml beef soup 30 min before a potato meal; 55 g whey was added to either the soup (whey preload) or potato (whey in meal) or no whey was given.
resultsGastric emptying was slowest after the whey preload (P < 0.0005). The incremental area under the blood glucose curve was less after the whey preload and whey in meal than after no whey (P < 0.005). Plasma glucose-dependent insulinotropic polypeptide, insulin, and cholecystokinin concentrations were higher on both whey days than after no whey, whereas glucagon-like peptide 1 was greatest after the whey preload (P < 0.05).
conclusionsWhey protein consumed before a carbohydrate meal can stimulate insulin and incretin hormone secretion and slow gastric emptying, leading to marked reduction in postprandial glycemia in type 2 diabetes.
Indexed as
Identifiers
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.