Mathews, R., & Chu, Y. (2023). The effect of whole-grain oats, oat bran, and isolated beta-glucan on indices of Satiety and short-term Energy Intake. Food Reviews International, 40(4), 1196–1216. doi:10.1080/87559129.2023.2214807

Abstract:

This review examines the totality of evidence from randomized controlled trials to answer critical questions about the satiety perception of whole-grain oats, oat bran, and isolated beta-glucan. Twenty-two randomized controlled studies were selected following stringent criteria to minimize confounding. Whole-grain oats and oat bran more effectively promoted the perception of satiety than other grain foods that were lower in fiber, higher in refined grains, or lower in viscosity. When oat products were compared with other oat products, those higher in fiber and viscosity generally resulted in increased perception of satiety. Data for isolated beta-glucan were very limited, and no clear conclusions could be drawn. Of the different indices of satiety perception (i.e. hunger, fullness, satiety, desire to eat, prospective food intake), increased fullness was found to be the most positive satiety measurement for whole-grain oat and oat bran products. However, the intake of oat products was not found to consistently reduce short-term energy intake, particularly when limited to a second-meal effect. This may be attributed to the fact that the energy intake for the entire day was typically not measured, as the impact of soluble fiber on energy intake may be delayed.