#488: Does Time of Day Impact Hunger, Appetite & Satiety?
Sigma Nutrition Radio
Danny Lennon
4.8 • 633 Ratings
🗓️ 11 July 2023
⏱️ 88 minutes
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Summary
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About This Episode:
The topic of whether hunger and satiety are affected by the time of day has generated considerable interest within the nutrition research community. Researchers have been particularly intrigued by the potential influence of circadian rhythms on caloric intake throughout the day.
Initially, a number of studies proposed that consuming high energy intakes in the morning could lead to significantly greater weight loss compared to evening consumption. And while much attention was placed on the hypothesis that differences in expenditure were the cause, more recent research has called that into doubt.
And so, it is crucial to consider the possibility that other factors may be contributing to the outcomes observed in the intervention trials. In recent years, a series of papers has suggested an alternative explanation; the impact of time-of-day energy intake on appetite and hunger.
In this episode, Alan and Danny take a look at the current evidence related to this connection between time-of-day, appetite, and energy intake. And then, from that, what does this mean for how calorie distribution may affect dietary intake, body composition and health.
Transcript
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| 0:00.0 | Welcome to Sigma Nutrition Radio. This is episode 488 of the podcast. My name is Danny Lennon and with me is Dr. Alan Flanagan. |
| 0:24.4 | Today we're actually going to talk about something that I think both of us find quite interesting |
| 0:28.4 | and this is something that has connections to a number of previous podcast episodes that we may |
| 0:34.5 | mention as we get through but we're going to try and focus in on the topic of does time of day impact hunger, appetite, satiety, etc. |
| 0:45.3 | And this is an area of research that I think is really interesting and has generated a lot of interest, I think, in more recent years for sure within research. And I think |
| 0:55.9 | there's going to be a lot more to come in this area. And we're going to start by maybe talking |
| 1:00.9 | about where some of these ideas come from, what current research we have at this point. |
| 1:05.7 | And I think going back to the start of this, and I'm going to get you to elaborate on this |
| 1:10.1 | in a moment, Alan, |
| 1:17.8 | we had this connection between either time of day or even how energy might be distributed in the day and certain outcomes. So there were some studies looking at weight loss, for example, |
| 1:22.9 | and started putting forward some hypotheses that there could be something to this time of day |
| 1:29.0 | when we consume nutrients or across the day where calories are placed. |
| 1:34.6 | And from that in some of our previous episodes, we discussed that maybe one of the first hypotheses |
| 1:39.1 | is that, well, maybe this is altering energy expenditure. |
| 1:43.1 | And we've also maybe in some of those episodes, |
| 1:45.4 | referenced how some more recent research has shone some light on how much of that that might |
| 1:50.6 | be playing a role or otherwise. But then there could be other explanations for some of these |
| 1:55.4 | results, of which one that we want to consider today is, is there differences in things |
| 2:00.2 | like appetite, satiety, |
| 2:01.9 | feelings of hunger, and so on. So before we get into some of the specific studies that might |
| 2:08.9 | illuminate on this, because we've talked about on this in some of our chrono-nutrition-related |
| 2:13.9 | episodes, it might be a good place to start, Alan, if you can give people an idea of where did some of these hypotheses first emerge |
... |
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