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The effect of monosodium glutamate (MSG) supplementation in soup or broth on satiety is not well understood. In the present study, the relative effects of four chicken broths with or without added MSG on motivational ratings and energy intakes at the next meal were compared using a double-blinded, within-subject design. A total of thirty-five normal-weight women, aged 20-40 years, took part in four study sessions. The four broths were base chicken broth (63 kJ), broth with added MSG (1·19 g) and nucleotides (0·03 g), broth with added MSG (1·22 g), and broth with added fat (BAF; 681 kJ). The preloads were presented twice at 09.00 and 11.15 hours for a maximum cumulative dose of 2·44 g MSG. Motivational ratings were collected before and at 15 min intervals post-ingestion for a total of 210 min. A test lunch meal was served at 12.00 hours, and plate waste was measured. The addition of MSG to chicken broth did not increase energy intakes at lunch or affect motivational ratings over the entire testing session. Both hunger and desire to snack between the second preload exposure and the test meal were significantly reduced in the MSG condition relative to the base broth condition (both, P ¼ 0·03). However, only the BAF significantly suppressed energy intakes at lunch compared with the base broth control condition. Supplementing chicken broth with MSG can increase subjective ratings for satiety but does not alter energy intake at the next meal relative to an equal energy broth without added MSG.Key words: Satiety: Appetite: Monosodium glutamate: SodiumThe amino acid L-glutamate is primarily consumed in the form of monosodium glutamate (MSG) and is known to elicit a distinguishable fifth taste termed 'umami'. MSG has been shown to improve the sensory characteristics of many different foods (1) and is commonly used as a flavour enhancer. The highly palatable savoury umami taste can also be achieved by pairing MSG with the nucleotides inosine 5 0 -monophosphate and guanosine 5 0 -monophosphate (MSG þ ) (1,2) .Enhancing the palatability of foods could potentially lead to overeating; however, evidence that MSG is associated with excess energy intake is mixed. Whereas some short-term experimental studies on satiation in relation to MSG intake have reported that MSG supplementation could lead to a more rapid recovery of hunger, no significant differences in hunger ratings or differences in subsequent energy intake were observed (3) . Other behavioural studies have reported that adding MSG to some foods can lead to higher energy intakes at a subsequent meal compared with an equal energy control without MSG, even when no effects on hunger ratings were observed (4) . In addition, that study reported that the addition of MSG in combination with the nucleotide ionosine monophosphate-5 (IMP-5) did not lead to higher energy consumption at a subsequent meal relative to the control and concluded that further investigation into the impact of MSG, alone as well as in combination with nucleotides, was warranted (4) . The results o...

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Previous research has shown that beverages containing soluble fibers can decrease energy intake at the next meal among normal weight participants. Caffeine and green tea catechins have separately been associated with increased satiety. The present study examined the satiating power of a beverage containing soluble fiber as well as a beverage containing the same fiber, caffeine and green tea catechins. These two test beverages were evaluated in comparison to an equal calorie control beverage as well as a no‐beverage control condition. All beverage preloads were presented three times for a total of 0.28–0.35kJ and 0–30g fiber. Dependent measures were appetite ratings and calorie intake at a test meal. The no‐beverage condition was associated with the highest ratings for hunger and the lowest ratings for fullness when compared to the other 3 beverage conditions. Of the three beverage conditions, the beverage containing the fiber, green tea catechins, and caffeine created the lowest hunger and the highest fullness ratings. That condition was also associated with the lowest energy intake at the next meal. The present findings indicate that the beverage containing caffeine and green tea catechins in combination with soluble fiber decrease appetite and energy intake relative to a beverage with equal caloric content.