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Int J Obes Relat Metab Disord. 2000 Nov;24(11):1419-25.

Short-term effects of yoghurt containing a novel fat emulsion on energy and macronutrient intakes in non-obese subjects.

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Northern Ireland Centre for Diet and Health, University of Ulster, Coleraine, Co Londonderry, Northern Ireland.



The satiating properties of fat remain poorly understood, particularly with reference to its physicochemical characteristics.


To investigate the short-term effects of consumption of yoghurt containing either a novel fat emulsion or normal milk fat, on the energy and macronutrient intakes of non-obese subjects.


Two double-blind, placebo-controlled, within-subject crossover studies were conducted three months apart. Twenty-nine (15 F, 14 M) and thirty (16 F, 14 M) subjects participated in Study 1 and Study 2 respectively. In each study, subjects were given in random order, 7 days apart, either a 200g portion of a test (5g of a novel fat emulsion + 1 g milk fat) or control (6g milk fat) yoghurt at 1300 h. At 4h post-consumption subjects were given ad libitum access to a range of foods. Amounts of food consumed by individuals were determined by pre- and post-covert weighing of individual serving dishes.


Mean energy intakes were significantly lower after the test yoghurt compared with the control yoghurt in Study 1 (6.4 vs 7.6 MJ; P< 0.001), Study 2 (6.9 vs 7.9 MJ; P<0.001), and for both studies combined (6.7 vs 7.7 MJ; P<0.001). The corresponding fat intakes in Study 1, Study 2 and in the combined studies were all significantly reduced (P< 0.001). Protein and carbohydrate intakes were also significantly reduced in Study 1 (P< 0.05), Study 2 (P< 0.01), and for the combined studies (P< 0.001).


These results suggest that the physicochemical characteristics of small amounts of dietary fat affect short-term satiety.

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